Public bug reported:

My system locked up, and stopped responding to mouse movement, keyboard,
network traffic, etc.

A few minutes later, it appeared to recover, although my X session
restarted and I had to log back in.

I found this in my kern.log:


Mar 16 09:08:33 fred kernel: [83775.521219] INFO: task jbd2/dm-1-8:1142 blocked 
for more than 10 seconds.
Mar 16 09:08:33 fred kernel: [83775.521223]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83775.521224] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83775.521226] jbd2/dm-1-8     D    0  1142      2 
0x80004000
Mar 16 09:08:33 fred kernel: [83775.521228] Call Trace:
Mar 16 09:08:33 fred kernel: [83775.521235]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83775.521238]  ? dm_process_bio+0x89/0x100
Mar 16 09:08:33 fred kernel: [83775.521240]  ? bit_wait_timeout+0xa0/0xa0
Mar 16 09:08:33 fred kernel: [83775.521241]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83775.521243]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83775.521244]  bit_wait_io+0x11/0x50
Mar 16 09:08:33 fred kernel: [83775.521246]  __wait_on_bit+0x33/0xa0
Mar 16 09:08:33 fred kernel: [83775.521248]  ? submit_bio+0x48/0x1d0
Mar 16 09:08:33 fred kernel: [83775.521250]  out_of_line_wait_on_bit+0x8d/0xb0
Mar 16 09:08:33 fred kernel: [83775.521252]  ? var_wake_function+0x30/0x30
Mar 16 09:08:33 fred kernel: [83775.521254]  __wait_on_buffer+0x34/0x40
Mar 16 09:08:33 fred kernel: [83775.521258]  
jbd2_journal_commit_transaction+0xf50/0x17e8
Mar 16 09:08:33 fred kernel: [83775.521262]  kjournald2+0xb6/0x280
Mar 16 09:08:33 fred kernel: [83775.521264]  ? wait_woken+0x80/0x80
Mar 16 09:08:33 fred kernel: [83775.521267]  kthread+0x104/0x140
Mar 16 09:08:33 fred kernel: [83775.521268]  ? commit_timeout+0x20/0x20
Mar 16 09:08:33 fred kernel: [83775.521269]  ? kthread_park+0x90/0x90
Mar 16 09:08:33 fred kernel: [83775.521271]  ret_from_fork+0x35/0x40
Mar 16 09:08:33 fred kernel: [83775.521324] INFO: task alsa-sink-USB A:3405 
blocked for more than 10 seconds.
Mar 16 09:08:33 fred kernel: [83775.521326]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83775.521327] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83775.521328] alsa-sink-USB A D    0  3405   3321 
0x00000320
Mar 16 09:08:33 fred kernel: [83775.521329] Call Trace:
Mar 16 09:08:33 fred kernel: [83775.521332]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83775.521334]  ? __switch_to_asm+0x34/0x70
Mar 16 09:08:33 fred kernel: [83775.521336]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83775.521337]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83775.521340]  wait_on_page_bit+0x11c/0x200
Mar 16 09:08:33 fred kernel: [83775.521342]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83775.521344]  wait_on_page_writeback+0x43/0x90
Mar 16 09:08:33 fred kernel: [83775.521346]  shmem_swapin_page+0x23b/0x660
Mar 16 09:08:33 fred kernel: [83775.521348]  ? xas_load+0xd/0x80
Mar 16 09:08:33 fred kernel: [83775.521349]  ? find_get_entry+0x5e/0x170
Mar 16 09:08:33 fred kernel: [83775.521351]  shmem_getpage_gfp+0x3c8/0x940
Mar 16 09:08:33 fred kernel: [83775.521354]  ? page_add_file_rmap+0xff/0x1a0
Mar 16 09:08:33 fred kernel: [83775.521355]  shmem_fault+0x79/0x210
Mar 16 09:08:33 fred kernel: [83775.521358]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83775.521359]  do_fault+0x24b/0x640
Mar 16 09:08:33 fred kernel: [83775.521361]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83775.521363]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83775.521365]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83775.521368]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83775.521369]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83775.521371]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83775.521373] RIP: 0033:0x7f94a7e13210
Mar 16 09:08:33 fred kernel: [83775.521378] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83775.521378] RSP: 002b:00007f94a0a54390 EFLAGS: 
00010206
Mar 16 09:08:33 fred kernel: [83775.521380] RAX: 00007f94a2e37000 RBX: 
0000558cba86ea00 RCX: 0000000000000001
Mar 16 09:08:33 fred kernel: [83775.521381] RDX: 0000000327d20610 RSI: 
00007f94a0a54680 RDI: 00007f94a2e37000
Mar 16 09:08:33 fred kernel: [83775.521382] RBP: 00007f94a0a54680 R08: 
0000000000000dc8 R09: 0000558cba90ca70
Mar 16 09:08:33 fred kernel: [83775.521382] R10: 0000000000000e60 R11: 
0000000000000246 R12: 000000000000485c
Mar 16 09:08:33 fred kernel: [83775.521383] R13: 0000000000000000 R14: 
0000558cba873810 R15: 0000000000000001
Mar 16 09:08:33 fred kernel: [83775.521420] Call Trace:
Mar 16 09:08:33 fred kernel: [83775.521422]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83775.521424]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83775.521425]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83775.521427]  filemap_fault+0x277/0xa50
Mar 16 09:08:33 fred kernel: [83775.521428]  ? __schedule+0x2eb/0x740
Mar 16 09:08:33 fred kernel: [83775.521430]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83775.521433]  ext4_filemap_fault+0x32/0x46
Mar 16 09:08:33 fred kernel: [83775.521434]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83775.521436]  do_fault+0x24b/0x640
Mar 16 09:08:33 fred kernel: [83775.521437]  ? __switch_to_asm+0x34/0x70
Mar 16 09:08:33 fred kernel: [83775.521439]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83775.521441]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83775.521443]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83775.521446]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83775.521447]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83775.521449]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83775.521450] RIP: 0033:0x7fb280323b50
Mar 16 09:08:33 fred kernel: [83775.521452] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83775.521453] RSP: 002b:00007fb2387f3b40 EFLAGS: 
00010286
Mar 16 09:08:33 fred kernel: [83775.521454] RAX: ffffffffffffffff RBX: 
0000000000014732 RCX: ffffffffffffff80
Mar 16 09:08:33 fred kernel: [83775.521455] RDX: 0000000000000001 RSI: 
0000000000000080 RDI: 00007fb1ec000be0
Mar 16 09:08:33 fred kernel: [83775.521456] RBP: 00000000105c287a R08: 
00007fb2387f3b88 R09: 00007fb1ec000bc0
Mar 16 09:08:33 fred kernel: [83775.521456] R10: 00007fb2387f3b60 R11: 
0000000000000246 R12: 00007fb283889880
Mar 16 09:08:33 fred kernel: [83775.521457] R13: 00007fb2387f3b80 R14: 
00000000000000ff R15: 00007fb1ec000be0
Mar 16 09:08:33 fred kernel: [83775.521464] INFO: task TIMER:4561 blocked for 
more than 10 seconds.
Mar 16 09:08:33 fred kernel: [83775.521465]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83775.521466] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83775.521467] TIMER           D    0  4561      1 
0x00004000
Mar 16 09:08:33 fred kernel: [83775.521469] Call Trace:
Mar 16 09:08:33 fred kernel: [83775.521471]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83775.521473]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83775.521474]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83775.521476]  filemap_fault+0x277/0xa50
Mar 16 09:08:33 fred kernel: [83775.521478]  ? __schedule+0x2eb/0x740
Mar 16 09:08:33 fred kernel: [83775.521479]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83775.521481]  ext4_filemap_fault+0x32/0x46
Mar 16 09:08:33 fred kernel: [83775.521482]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83775.521484]  do_fault+0x24b/0x640
Mar 16 09:08:33 fred kernel: [83775.521485]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83775.521488]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83775.521490]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83775.521492]  ? do_futex+0x10f/0x1e0
Mar 16 09:08:33 fred kernel: [83775.521494]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83775.521496]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83775.521497]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83775.521498] RIP: 0033:0x7fb27f69b680
Mar 16 09:08:33 fred kernel: [83775.521500] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83775.521501] RSP: 002b:00007fb1d57e8c58 EFLAGS: 
00010206
Mar 16 09:08:33 fred kernel: [83775.521502] RAX: 00007fb280ff8460 RBX: 
00007fb1f80b5d50 RCX: 0000000000000001
Mar 16 09:08:33 fred kernel: [83775.521503] RDX: 00007fb20002fcc0 RSI: 
0000000000000012 RDI: 00007fb1f870f140
Mar 16 09:08:33 fred kernel: [83775.521504] RBP: 0000000000014701 R08: 
00007fb1f80b5d50 R09: 000000001bfe19e6
Mar 16 09:08:33 fred kernel: [83775.521505] R10: 000000000000000e R11: 
0000000000014a78 R12: 00007fb1d57e8d70
Mar 16 09:08:33 fred kernel: [83775.521505] R13: 00000000000000ff R14: 
00007fb1d57e8ca8 R15: 00007fb1d57e8d90
Mar 16 09:08:33 fred kernel: [83785.765182] INFO: task postgres:2052 blocked 
for more than 10 seconds.
Mar 16 09:08:33 fred kernel: [83785.765186]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83785.765187] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83785.765189] postgres        D    0  2052   1787 
0x00004000
Mar 16 09:08:33 fred kernel: [83785.765191] Call Trace:
Mar 16 09:08:33 fred kernel: [83785.765197]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83785.765199]  ? __schedule+0x2eb/0x740
Mar 16 09:08:33 fred kernel: [83785.765201]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83785.765203]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83785.765206]  wait_on_page_bit+0x11c/0x200
Mar 16 09:08:33 fred kernel: [83785.765208]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83785.765210]  wait_on_page_writeback+0x43/0x90
Mar 16 09:08:33 fred kernel: [83785.765214]  shmem_swapin_page+0x23b/0x660
Mar 16 09:08:33 fred kernel: [83785.765216]  ? xas_load+0xd/0x80
Mar 16 09:08:33 fred kernel: [83785.765218]  ? find_get_entry+0x5e/0x170
Mar 16 09:08:33 fred kernel: [83785.765221]  shmem_getpage_gfp+0x3c8/0x940
Mar 16 09:08:33 fred kernel: [83785.765225]  ? page_add_file_rmap+0xff/0x1a0
Mar 16 09:08:33 fred kernel: [83785.765226]  shmem_fault+0x79/0x210
Mar 16 09:08:33 fred kernel: [83785.765229]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83785.765231]  do_fault+0x38b/0x640
Mar 16 09:08:33 fred kernel: [83785.765233]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83785.765235]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83785.765238]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83785.765240]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83785.765242]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83785.765244]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83785.765246] RIP: 0033:0x558a9313e3fc
Mar 16 09:08:33 fred kernel: [83785.765251] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83785.765252] RSP: 002b:00007ffd6473e160 EFLAGS: 
00010202
Mar 16 09:08:33 fred kernel: [83785.765254] RAX: 00007fadf4a72d40 RBX: 
0000558a93ef2000 RCX: 00007fadf7aea58a
Mar 16 09:08:33 fred kernel: [83785.765254] RDX: 0000000000000001 RSI: 
0000558a93ef2078 RDI: 0000000000000004
Mar 16 09:08:33 fred kernel: [83785.765255] RBP: 00007ffd6473e200 R08: 
00007ffd6475a090 R09: 00007ffd6473e198
Mar 16 09:08:33 fred kernel: [83785.765256] R10: 0000000000001388 R11: 
0000000000000246 R12: 0000000000000000
Mar 16 09:08:33 fred kernel: [83785.765257] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ef2000
Mar 16 09:08:33 fred kernel: [83796.001074] INFO: task postgres:2052 blocked 
for more than 20 seconds.
Mar 16 09:08:33 fred kernel: [83796.001078]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83796.001080] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83796.001081] postgres        D    0  2052   1787 
0x00004000
Mar 16 09:08:33 fred kernel: [83796.001084] Call Trace:
Mar 16 09:08:33 fred kernel: [83796.001090]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83796.001092]  ? __schedule+0x2eb/0x740
Mar 16 09:08:33 fred kernel: [83796.001093]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83796.001095]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83796.001098]  wait_on_page_bit+0x11c/0x200
Mar 16 09:08:33 fred kernel: [83796.001100]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83796.001102]  wait_on_page_writeback+0x43/0x90
Mar 16 09:08:33 fred kernel: [83796.001104]  shmem_swapin_page+0x23b/0x660
Mar 16 09:08:33 fred kernel: [83796.001106]  ? xas_load+0xd/0x80
Mar 16 09:08:33 fred kernel: [83796.001108]  ? find_get_entry+0x5e/0x170
Mar 16 09:08:33 fred kernel: [83796.001110]  shmem_getpage_gfp+0x3c8/0x940
Mar 16 09:08:33 fred kernel: [83796.001112]  ? page_add_file_rmap+0xff/0x1a0
Mar 16 09:08:33 fred kernel: [83796.001113]  shmem_fault+0x79/0x210
Mar 16 09:08:33 fred kernel: [83796.001116]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83796.001117]  do_fault+0x38b/0x640
Mar 16 09:08:33 fred kernel: [83796.001119]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83796.001121]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83796.001124]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83796.001126]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83796.001128]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83796.001130]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83796.001132] RIP: 0033:0x558a9313e3fc
Mar 16 09:08:33 fred kernel: [83796.001136] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83796.001138] RSP: 002b:00007ffd6473e160 EFLAGS: 
00010202
Mar 16 09:08:33 fred kernel: [83796.001139] RAX: 00007fadf4a72d40 RBX: 
0000558a93ef2000 RCX: 00007fadf7aea58a
Mar 16 09:08:33 fred kernel: [83796.001140] RDX: 0000000000000001 RSI: 
0000558a93ef2078 RDI: 0000000000000004
Mar 16 09:08:33 fred kernel: [83796.001141] RBP: 00007ffd6473e200 R08: 
00007ffd6475a090 R09: 00007ffd6473e198
Mar 16 09:08:33 fred kernel: [83796.001142] R10: 0000000000001388 R11: 
0000000000000246 R12: 0000000000000000
Mar 16 09:08:33 fred kernel: [83796.001143] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ef2000
Mar 16 09:08:33 fred kernel: [83796.001145] INFO: task postgres:2055 blocked 
for more than 10 seconds.
Mar 16 09:08:33 fred kernel: [83796.001147]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83796.001148] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83796.001149] postgres        D    0  2055   1787 
0x00000000
Mar 16 09:08:33 fred kernel: [83796.001150] Call Trace:
Mar 16 09:08:33 fred kernel: [83796.001153]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83796.001155]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83796.001156]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83796.001158]  wait_on_page_bit+0x11c/0x200
Mar 16 09:08:33 fred kernel: [83796.001160]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83796.001162]  wait_on_page_writeback+0x43/0x90
Mar 16 09:08:33 fred kernel: [83796.001163]  shmem_swapin_page+0x23b/0x660
Mar 16 09:08:33 fred kernel: [83796.001164]  ? xas_load+0xd/0x80
Mar 16 09:08:33 fred kernel: [83796.001166]  ? find_get_entry+0x5e/0x170
Mar 16 09:08:33 fred kernel: [83796.001168]  shmem_getpage_gfp+0x3c8/0x940
Mar 16 09:08:33 fred kernel: [83796.001169]  ? page_add_file_rmap+0xff/0x1a0
Mar 16 09:08:33 fred kernel: [83796.001171]  shmem_fault+0x79/0x210
Mar 16 09:08:33 fred kernel: [83796.001173]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83796.001175]  do_fault+0x38b/0x640
Mar 16 09:08:33 fred kernel: [83796.001176]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83796.001178]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83796.001180]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83796.001182]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83796.001184]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83796.001185]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83796.001186] RIP: 0033:0x558a9313e3fc
Mar 16 09:08:33 fred kernel: [83796.001187] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83796.001188] RSP: 002b:00007ffd6473e1b0 EFLAGS: 
00010206
Mar 16 09:08:33 fred kernel: [83796.001189] RAX: 00007fadf4a70230 RBX: 
0000558a93ee7ae8 RCX: 00007fadf7aea58a
Mar 16 09:08:33 fred kernel: [83796.001190] RDX: 0000000000000001 RSI: 
0000558a93ee7b60 RDI: 0000000000000004
Mar 16 09:08:33 fred kernel: [83796.001191] RBP: 00007ffd6473e250 R08: 
00007ffd6475a090 R09: 00007ffd6473e1e8
Mar 16 09:08:33 fred kernel: [83796.001192] R10: 000000000002bf20 R11: 
0000000000000246 R12: 0000000000000000
Mar 16 09:08:33 fred kernel: [83796.001193] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ee7ae8
Mar 16 09:08:33 fred kernel: [83806.240906] INFO: task jbd2/dm-1-8:1142 blocked 
for more than 10 seconds.
Mar 16 09:08:33 fred kernel: [83806.240909]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83806.240910] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83806.240912] jbd2/dm-1-8     D    0  1142      2 
0x80004000
Mar 16 09:08:33 fred kernel: [83806.240914] Call Trace:
Mar 16 09:08:33 fred kernel: [83806.240920]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83806.240923]  ? __switch_to_asm+0x40/0x70
Mar 16 09:08:33 fred kernel: [83806.240925]  ? __switch_to_asm+0x34/0x70
Mar 16 09:08:33 fred kernel: [83806.240927]  ? bit_wait_timeout+0xa0/0xa0
Mar 16 09:08:33 fred kernel: [83806.240928]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83806.240930]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83806.240931]  bit_wait_io+0x11/0x50
Mar 16 09:08:33 fred kernel: [83806.240933]  __wait_on_bit+0x33/0xa0
Mar 16 09:08:33 fred kernel: [83806.240935]  out_of_line_wait_on_bit+0x8d/0xb0
Mar 16 09:08:33 fred kernel: [83806.240938]  ? var_wake_function+0x30/0x30
Mar 16 09:08:33 fred kernel: [83806.240940]  __wait_on_buffer+0x34/0x40
Mar 16 09:08:33 fred kernel: [83806.240942]  
jbd2_journal_commit_transaction+0x139f/0x17e8
Mar 16 09:08:33 fred kernel: [83806.240945]  kjournald2+0xb6/0x280
Mar 16 09:08:33 fred kernel: [83806.240947]  ? wait_woken+0x80/0x80
Mar 16 09:08:33 fred kernel: [83806.240949]  kthread+0x104/0x140
Mar 16 09:08:33 fred kernel: [83806.240951]  ? commit_timeout+0x20/0x20
Mar 16 09:08:33 fred kernel: [83806.240952]  ? kthread_park+0x90/0x90
Mar 16 09:08:33 fred kernel: [83806.240954]  ret_from_fork+0x35/0x40
Mar 16 09:08:33 fred kernel: [83806.240987] INFO: task postgres:2052 blocked 
for more than 30 seconds.
Mar 16 09:08:33 fred kernel: [83806.240988]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83806.240989] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83806.240990] postgres        D    0  2052   1787 
0x00004000
Mar 16 09:08:33 fred kernel: [83806.240992] Call Trace:
Mar 16 09:08:33 fred kernel: [83806.240994]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83806.240996]  ? __schedule+0x2eb/0x740
Mar 16 09:08:33 fred kernel: [83806.240998]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83806.240999]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83806.241002]  wait_on_page_bit+0x11c/0x200
Mar 16 09:08:33 fred kernel: [83806.241004]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83806.241006]  wait_on_page_writeback+0x43/0x90
Mar 16 09:08:33 fred kernel: [83806.241008]  shmem_swapin_page+0x23b/0x660
Mar 16 09:08:33 fred kernel: [83806.241010]  ? xas_load+0xd/0x80
Mar 16 09:08:33 fred kernel: [83806.241011]  ? find_get_entry+0x5e/0x170
Mar 16 09:08:33 fred kernel: [83806.241013]  shmem_getpage_gfp+0x3c8/0x940
Mar 16 09:08:33 fred kernel: [83806.241016]  ? page_add_file_rmap+0xff/0x1a0
Mar 16 09:08:33 fred kernel: [83806.241018]  shmem_fault+0x79/0x210
Mar 16 09:08:33 fred kernel: [83806.241020]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83806.241021]  do_fault+0x38b/0x640
Mar 16 09:08:33 fred kernel: [83806.241023]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83806.241025]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83806.241027]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83806.241030]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83806.241031]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83806.241033]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83806.241035] RIP: 0033:0x558a9313e3fc
Mar 16 09:08:33 fred kernel: [83806.241039] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83806.241040] RSP: 002b:00007ffd6473e160 EFLAGS: 
00010202
Mar 16 09:08:33 fred kernel: [83806.241042] RAX: 00007fadf4a72d40 RBX: 
0000558a93ef2000 RCX: 00007fadf7aea58a
Mar 16 09:08:33 fred kernel: [83806.241042] RDX: 0000000000000001 RSI: 
0000558a93ef2078 RDI: 0000000000000004
Mar 16 09:08:33 fred kernel: [83806.241043] RBP: 00007ffd6473e200 R08: 
00007ffd6475a090 R09: 00007ffd6473e198
Mar 16 09:08:33 fred kernel: [83806.241044] R10: 0000000000001388 R11: 
0000000000000246 R12: 0000000000000000
Mar 16 09:08:33 fred kernel: [83806.241045] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ef2000
Mar 16 09:08:33 fred kernel: [83806.241047] INFO: task postgres:2055 blocked 
for more than 20 seconds.
Mar 16 09:08:33 fred kernel: [83806.241049]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
Mar 16 09:08:33 fred kernel: [83806.241050] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 16 09:08:33 fred kernel: [83806.241051] postgres        D    0  2055   1787 
0x00000000
Mar 16 09:08:33 fred kernel: [83806.241052] Call Trace:
Mar 16 09:08:33 fred kernel: [83806.241054]  __schedule+0x2e3/0x740
Mar 16 09:08:33 fred kernel: [83806.241056]  schedule+0x42/0xb0
Mar 16 09:08:33 fred kernel: [83806.241057]  io_schedule+0x16/0x40
Mar 16 09:08:33 fred kernel: [83806.241059]  wait_on_page_bit+0x11c/0x200
Mar 16 09:08:33 fred kernel: [83806.241061]  ? file_fdatawait_range+0x30/0x30
Mar 16 09:08:33 fred kernel: [83806.241062]  wait_on_page_writeback+0x43/0x90
Mar 16 09:08:33 fred kernel: [83806.241064]  shmem_swapin_page+0x23b/0x660
Mar 16 09:08:33 fred kernel: [83806.241065]  ? xas_load+0xd/0x80
Mar 16 09:08:33 fred kernel: [83806.241067]  ? find_get_entry+0x5e/0x170
Mar 16 09:08:33 fred kernel: [83806.241069]  shmem_getpage_gfp+0x3c8/0x940
Mar 16 09:08:33 fred kernel: [83806.241071]  ? page_add_file_rmap+0xff/0x1a0
Mar 16 09:08:33 fred kernel: [83806.241073]  shmem_fault+0x79/0x210
Mar 16 09:08:33 fred kernel: [83806.241075]  __do_fault+0x3c/0x130
Mar 16 09:08:33 fred kernel: [83806.241077]  do_fault+0x38b/0x640
Mar 16 09:08:33 fred kernel: [83806.241078]  __handle_mm_fault+0x4c5/0x7a0
Mar 16 09:08:33 fred kernel: [83806.241080]  handle_mm_fault+0xca/0x200
Mar 16 09:08:33 fred kernel: [83806.241082]  do_user_addr_fault+0x1f9/0x450
Mar 16 09:08:33 fred kernel: [83806.241084]  __do_page_fault+0x58/0x90
Mar 16 09:08:33 fred kernel: [83806.241086]  do_page_fault+0x2c/0xe0
Mar 16 09:08:33 fred kernel: [83806.241088]  page_fault+0x34/0x40
Mar 16 09:08:33 fred kernel: [83806.241089] RIP: 0033:0x558a9313e3fc
Mar 16 09:08:33 fred kernel: [83806.241091] Code: Bad RIP value.
Mar 16 09:08:33 fred kernel: [83806.241091] RSP: 002b:00007ffd6473e1b0 EFLAGS: 
00010206
Mar 16 09:08:33 fred kernel: [83806.241092] RAX: 00007fadf4a70230 RBX: 
0000558a93ee7ae8 RCX: 00007fadf7aea58a
Mar 16 09:08:33 fred kernel: [83806.241093] RDX: 0000000000000001 RSI: 
0000558a93ee7b60 RDI: 0000000000000004
Mar 16 09:08:33 fred kernel: [83806.241094] RBP: 00007ffd6473e250 R08: 
00007ffd6475a090 R09: 00007ffd6473e1e8
Mar 16 09:08:33 fred kernel: [83806.241095] R10: 000000000002bf20 R11: 
0000000000000246 R12: 0000000000000000
Mar 16 09:08:33 fred kernel: [83806.241095] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ee7ae8
Mar 16 09:08:39 fred kernel: [83928.308140] traps: xfsettingsd[122296] trap 
int3 ip:7fcd760100b5 sp:7ffd7572ec90 error:0 in 
libglib-2.0.so.0.6400.6[7fcd75fd4000+84000]
Mar 16 09:08:39 fred kernel: [83928.717467] traps: xfsettingsd[122307] trap 
int3 ip:7f94c19360b5 sp:7ffef2059750 error:0 in 
libglib-2.0.so.0.6400.6[7f94c18fa000+84000]
Mar 16 09:08:44 fred kernel: [83933.156936] rfkill: input handler disabled
Mar 16 09:08:56 fred kernel: [83945.709903] rfkill: input handler enabled


Any hints as to what might cause this would be appreciated.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-65-generic 5.4.0-65.73
ProcVersionSignature: Ubuntu 5.4.0-65.73-generic 5.4.78
Uname: Linux 5.4.0-65-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  rav       122285 F.... pulseaudio
 /dev/snd/pcmC1D0p:   rav       122285 F...m pulseaudio
 /dev/snd/controlC0:  rav       122285 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Tue Mar 16 10:09:17 2021
HibernationDevice:
 #RESUME=UUID=8dbbb84c-f32c-453a-821d-f37b58b59df7
 RESUME=/dev/mapper/cryptlvm-cryptswap
InstallationDate: Installed on 2016-02-27 (1844 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Dell Inc. XPS 13 9350
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-65-generic 
root=UUID=df492f2c-70a5-4489-b320-b5e3e9403a9f ro text console=ttyUSB0,115200 
console=tty0 resume=UUID=117c988b-5c85-4d03-85d6-46fa2fd2a30f 
crashkernel=512M-:192M
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-65-generic N/A
 linux-backports-modules-5.4.0-65-generic  N/A
 linux-firmware                            1.187.9
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2021-02-16 (27 days ago)
dmi.bios.date: 01/16/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.7.0
dmi.board.name: 09JHRY
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvr1.7.0:bd01/16/2018:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn09JHRY:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.family: NULL
dmi.product.name: XPS 13 9350
dmi.product.sku: 0704
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug focal

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1919307

Title:
  kernel hang

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  My system locked up, and stopped responding to mouse movement,
  keyboard, network traffic, etc.

  A few minutes later, it appeared to recover, although my X session
  restarted and I had to log back in.

  I found this in my kern.log:

  
  Mar 16 09:08:33 fred kernel: [83775.521219] INFO: task jbd2/dm-1-8:1142 
blocked for more than 10 seconds.
  Mar 16 09:08:33 fred kernel: [83775.521223]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83775.521224] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83775.521226] jbd2/dm-1-8     D    0  1142      
2 0x80004000
  Mar 16 09:08:33 fred kernel: [83775.521228] Call Trace:
  Mar 16 09:08:33 fred kernel: [83775.521235]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83775.521238]  ? dm_process_bio+0x89/0x100
  Mar 16 09:08:33 fred kernel: [83775.521240]  ? bit_wait_timeout+0xa0/0xa0
  Mar 16 09:08:33 fred kernel: [83775.521241]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83775.521243]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83775.521244]  bit_wait_io+0x11/0x50
  Mar 16 09:08:33 fred kernel: [83775.521246]  __wait_on_bit+0x33/0xa0
  Mar 16 09:08:33 fred kernel: [83775.521248]  ? submit_bio+0x48/0x1d0
  Mar 16 09:08:33 fred kernel: [83775.521250]  out_of_line_wait_on_bit+0x8d/0xb0
  Mar 16 09:08:33 fred kernel: [83775.521252]  ? var_wake_function+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83775.521254]  __wait_on_buffer+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83775.521258]  
jbd2_journal_commit_transaction+0xf50/0x17e8
  Mar 16 09:08:33 fred kernel: [83775.521262]  kjournald2+0xb6/0x280
  Mar 16 09:08:33 fred kernel: [83775.521264]  ? wait_woken+0x80/0x80
  Mar 16 09:08:33 fred kernel: [83775.521267]  kthread+0x104/0x140
  Mar 16 09:08:33 fred kernel: [83775.521268]  ? commit_timeout+0x20/0x20
  Mar 16 09:08:33 fred kernel: [83775.521269]  ? kthread_park+0x90/0x90
  Mar 16 09:08:33 fred kernel: [83775.521271]  ret_from_fork+0x35/0x40
  Mar 16 09:08:33 fred kernel: [83775.521324] INFO: task alsa-sink-USB A:3405 
blocked for more than 10 seconds.
  Mar 16 09:08:33 fred kernel: [83775.521326]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83775.521327] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83775.521328] alsa-sink-USB A D    0  3405   
3321 0x00000320
  Mar 16 09:08:33 fred kernel: [83775.521329] Call Trace:
  Mar 16 09:08:33 fred kernel: [83775.521332]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83775.521334]  ? __switch_to_asm+0x34/0x70
  Mar 16 09:08:33 fred kernel: [83775.521336]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83775.521337]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83775.521340]  wait_on_page_bit+0x11c/0x200
  Mar 16 09:08:33 fred kernel: [83775.521342]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83775.521344]  wait_on_page_writeback+0x43/0x90
  Mar 16 09:08:33 fred kernel: [83775.521346]  shmem_swapin_page+0x23b/0x660
  Mar 16 09:08:33 fred kernel: [83775.521348]  ? xas_load+0xd/0x80
  Mar 16 09:08:33 fred kernel: [83775.521349]  ? find_get_entry+0x5e/0x170
  Mar 16 09:08:33 fred kernel: [83775.521351]  shmem_getpage_gfp+0x3c8/0x940
  Mar 16 09:08:33 fred kernel: [83775.521354]  ? page_add_file_rmap+0xff/0x1a0
  Mar 16 09:08:33 fred kernel: [83775.521355]  shmem_fault+0x79/0x210
  Mar 16 09:08:33 fred kernel: [83775.521358]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83775.521359]  do_fault+0x24b/0x640
  Mar 16 09:08:33 fred kernel: [83775.521361]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83775.521363]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83775.521365]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83775.521368]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83775.521369]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83775.521371]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83775.521373] RIP: 0033:0x7f94a7e13210
  Mar 16 09:08:33 fred kernel: [83775.521378] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83775.521378] RSP: 002b:00007f94a0a54390 
EFLAGS: 00010206
  Mar 16 09:08:33 fred kernel: [83775.521380] RAX: 00007f94a2e37000 RBX: 
0000558cba86ea00 RCX: 0000000000000001
  Mar 16 09:08:33 fred kernel: [83775.521381] RDX: 0000000327d20610 RSI: 
00007f94a0a54680 RDI: 00007f94a2e37000
  Mar 16 09:08:33 fred kernel: [83775.521382] RBP: 00007f94a0a54680 R08: 
0000000000000dc8 R09: 0000558cba90ca70
  Mar 16 09:08:33 fred kernel: [83775.521382] R10: 0000000000000e60 R11: 
0000000000000246 R12: 000000000000485c
  Mar 16 09:08:33 fred kernel: [83775.521383] R13: 0000000000000000 R14: 
0000558cba873810 R15: 0000000000000001
  Mar 16 09:08:33 fred kernel: [83775.521420] Call Trace:
  Mar 16 09:08:33 fred kernel: [83775.521422]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83775.521424]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83775.521425]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83775.521427]  filemap_fault+0x277/0xa50
  Mar 16 09:08:33 fred kernel: [83775.521428]  ? __schedule+0x2eb/0x740
  Mar 16 09:08:33 fred kernel: [83775.521430]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83775.521433]  ext4_filemap_fault+0x32/0x46
  Mar 16 09:08:33 fred kernel: [83775.521434]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83775.521436]  do_fault+0x24b/0x640
  Mar 16 09:08:33 fred kernel: [83775.521437]  ? __switch_to_asm+0x34/0x70
  Mar 16 09:08:33 fred kernel: [83775.521439]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83775.521441]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83775.521443]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83775.521446]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83775.521447]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83775.521449]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83775.521450] RIP: 0033:0x7fb280323b50
  Mar 16 09:08:33 fred kernel: [83775.521452] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83775.521453] RSP: 002b:00007fb2387f3b40 
EFLAGS: 00010286
  Mar 16 09:08:33 fred kernel: [83775.521454] RAX: ffffffffffffffff RBX: 
0000000000014732 RCX: ffffffffffffff80
  Mar 16 09:08:33 fred kernel: [83775.521455] RDX: 0000000000000001 RSI: 
0000000000000080 RDI: 00007fb1ec000be0
  Mar 16 09:08:33 fred kernel: [83775.521456] RBP: 00000000105c287a R08: 
00007fb2387f3b88 R09: 00007fb1ec000bc0
  Mar 16 09:08:33 fred kernel: [83775.521456] R10: 00007fb2387f3b60 R11: 
0000000000000246 R12: 00007fb283889880
  Mar 16 09:08:33 fred kernel: [83775.521457] R13: 00007fb2387f3b80 R14: 
00000000000000ff R15: 00007fb1ec000be0
  Mar 16 09:08:33 fred kernel: [83775.521464] INFO: task TIMER:4561 blocked for 
more than 10 seconds.
  Mar 16 09:08:33 fred kernel: [83775.521465]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83775.521466] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83775.521467] TIMER           D    0  4561      
1 0x00004000
  Mar 16 09:08:33 fred kernel: [83775.521469] Call Trace:
  Mar 16 09:08:33 fred kernel: [83775.521471]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83775.521473]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83775.521474]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83775.521476]  filemap_fault+0x277/0xa50
  Mar 16 09:08:33 fred kernel: [83775.521478]  ? __schedule+0x2eb/0x740
  Mar 16 09:08:33 fred kernel: [83775.521479]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83775.521481]  ext4_filemap_fault+0x32/0x46
  Mar 16 09:08:33 fred kernel: [83775.521482]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83775.521484]  do_fault+0x24b/0x640
  Mar 16 09:08:33 fred kernel: [83775.521485]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83775.521488]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83775.521490]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83775.521492]  ? do_futex+0x10f/0x1e0
  Mar 16 09:08:33 fred kernel: [83775.521494]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83775.521496]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83775.521497]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83775.521498] RIP: 0033:0x7fb27f69b680
  Mar 16 09:08:33 fred kernel: [83775.521500] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83775.521501] RSP: 002b:00007fb1d57e8c58 
EFLAGS: 00010206
  Mar 16 09:08:33 fred kernel: [83775.521502] RAX: 00007fb280ff8460 RBX: 
00007fb1f80b5d50 RCX: 0000000000000001
  Mar 16 09:08:33 fred kernel: [83775.521503] RDX: 00007fb20002fcc0 RSI: 
0000000000000012 RDI: 00007fb1f870f140
  Mar 16 09:08:33 fred kernel: [83775.521504] RBP: 0000000000014701 R08: 
00007fb1f80b5d50 R09: 000000001bfe19e6
  Mar 16 09:08:33 fred kernel: [83775.521505] R10: 000000000000000e R11: 
0000000000014a78 R12: 00007fb1d57e8d70
  Mar 16 09:08:33 fred kernel: [83775.521505] R13: 00000000000000ff R14: 
00007fb1d57e8ca8 R15: 00007fb1d57e8d90
  Mar 16 09:08:33 fred kernel: [83785.765182] INFO: task postgres:2052 blocked 
for more than 10 seconds.
  Mar 16 09:08:33 fred kernel: [83785.765186]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83785.765187] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83785.765189] postgres        D    0  2052   
1787 0x00004000
  Mar 16 09:08:33 fred kernel: [83785.765191] Call Trace:
  Mar 16 09:08:33 fred kernel: [83785.765197]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83785.765199]  ? __schedule+0x2eb/0x740
  Mar 16 09:08:33 fred kernel: [83785.765201]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83785.765203]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83785.765206]  wait_on_page_bit+0x11c/0x200
  Mar 16 09:08:33 fred kernel: [83785.765208]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83785.765210]  wait_on_page_writeback+0x43/0x90
  Mar 16 09:08:33 fred kernel: [83785.765214]  shmem_swapin_page+0x23b/0x660
  Mar 16 09:08:33 fred kernel: [83785.765216]  ? xas_load+0xd/0x80
  Mar 16 09:08:33 fred kernel: [83785.765218]  ? find_get_entry+0x5e/0x170
  Mar 16 09:08:33 fred kernel: [83785.765221]  shmem_getpage_gfp+0x3c8/0x940
  Mar 16 09:08:33 fred kernel: [83785.765225]  ? page_add_file_rmap+0xff/0x1a0
  Mar 16 09:08:33 fred kernel: [83785.765226]  shmem_fault+0x79/0x210
  Mar 16 09:08:33 fred kernel: [83785.765229]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83785.765231]  do_fault+0x38b/0x640
  Mar 16 09:08:33 fred kernel: [83785.765233]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83785.765235]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83785.765238]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83785.765240]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83785.765242]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83785.765244]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83785.765246] RIP: 0033:0x558a9313e3fc
  Mar 16 09:08:33 fred kernel: [83785.765251] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83785.765252] RSP: 002b:00007ffd6473e160 
EFLAGS: 00010202
  Mar 16 09:08:33 fred kernel: [83785.765254] RAX: 00007fadf4a72d40 RBX: 
0000558a93ef2000 RCX: 00007fadf7aea58a
  Mar 16 09:08:33 fred kernel: [83785.765254] RDX: 0000000000000001 RSI: 
0000558a93ef2078 RDI: 0000000000000004
  Mar 16 09:08:33 fred kernel: [83785.765255] RBP: 00007ffd6473e200 R08: 
00007ffd6475a090 R09: 00007ffd6473e198
  Mar 16 09:08:33 fred kernel: [83785.765256] R10: 0000000000001388 R11: 
0000000000000246 R12: 0000000000000000
  Mar 16 09:08:33 fred kernel: [83785.765257] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ef2000
  Mar 16 09:08:33 fred kernel: [83796.001074] INFO: task postgres:2052 blocked 
for more than 20 seconds.
  Mar 16 09:08:33 fred kernel: [83796.001078]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83796.001080] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83796.001081] postgres        D    0  2052   
1787 0x00004000
  Mar 16 09:08:33 fred kernel: [83796.001084] Call Trace:
  Mar 16 09:08:33 fred kernel: [83796.001090]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83796.001092]  ? __schedule+0x2eb/0x740
  Mar 16 09:08:33 fred kernel: [83796.001093]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83796.001095]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83796.001098]  wait_on_page_bit+0x11c/0x200
  Mar 16 09:08:33 fred kernel: [83796.001100]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83796.001102]  wait_on_page_writeback+0x43/0x90
  Mar 16 09:08:33 fred kernel: [83796.001104]  shmem_swapin_page+0x23b/0x660
  Mar 16 09:08:33 fred kernel: [83796.001106]  ? xas_load+0xd/0x80
  Mar 16 09:08:33 fred kernel: [83796.001108]  ? find_get_entry+0x5e/0x170
  Mar 16 09:08:33 fred kernel: [83796.001110]  shmem_getpage_gfp+0x3c8/0x940
  Mar 16 09:08:33 fred kernel: [83796.001112]  ? page_add_file_rmap+0xff/0x1a0
  Mar 16 09:08:33 fred kernel: [83796.001113]  shmem_fault+0x79/0x210
  Mar 16 09:08:33 fred kernel: [83796.001116]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83796.001117]  do_fault+0x38b/0x640
  Mar 16 09:08:33 fred kernel: [83796.001119]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83796.001121]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83796.001124]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83796.001126]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83796.001128]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83796.001130]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83796.001132] RIP: 0033:0x558a9313e3fc
  Mar 16 09:08:33 fred kernel: [83796.001136] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83796.001138] RSP: 002b:00007ffd6473e160 
EFLAGS: 00010202
  Mar 16 09:08:33 fred kernel: [83796.001139] RAX: 00007fadf4a72d40 RBX: 
0000558a93ef2000 RCX: 00007fadf7aea58a
  Mar 16 09:08:33 fred kernel: [83796.001140] RDX: 0000000000000001 RSI: 
0000558a93ef2078 RDI: 0000000000000004
  Mar 16 09:08:33 fred kernel: [83796.001141] RBP: 00007ffd6473e200 R08: 
00007ffd6475a090 R09: 00007ffd6473e198
  Mar 16 09:08:33 fred kernel: [83796.001142] R10: 0000000000001388 R11: 
0000000000000246 R12: 0000000000000000
  Mar 16 09:08:33 fred kernel: [83796.001143] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ef2000
  Mar 16 09:08:33 fred kernel: [83796.001145] INFO: task postgres:2055 blocked 
for more than 10 seconds.
  Mar 16 09:08:33 fred kernel: [83796.001147]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83796.001148] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83796.001149] postgres        D    0  2055   
1787 0x00000000
  Mar 16 09:08:33 fred kernel: [83796.001150] Call Trace:
  Mar 16 09:08:33 fred kernel: [83796.001153]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83796.001155]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83796.001156]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83796.001158]  wait_on_page_bit+0x11c/0x200
  Mar 16 09:08:33 fred kernel: [83796.001160]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83796.001162]  wait_on_page_writeback+0x43/0x90
  Mar 16 09:08:33 fred kernel: [83796.001163]  shmem_swapin_page+0x23b/0x660
  Mar 16 09:08:33 fred kernel: [83796.001164]  ? xas_load+0xd/0x80
  Mar 16 09:08:33 fred kernel: [83796.001166]  ? find_get_entry+0x5e/0x170
  Mar 16 09:08:33 fred kernel: [83796.001168]  shmem_getpage_gfp+0x3c8/0x940
  Mar 16 09:08:33 fred kernel: [83796.001169]  ? page_add_file_rmap+0xff/0x1a0
  Mar 16 09:08:33 fred kernel: [83796.001171]  shmem_fault+0x79/0x210
  Mar 16 09:08:33 fred kernel: [83796.001173]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83796.001175]  do_fault+0x38b/0x640
  Mar 16 09:08:33 fred kernel: [83796.001176]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83796.001178]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83796.001180]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83796.001182]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83796.001184]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83796.001185]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83796.001186] RIP: 0033:0x558a9313e3fc
  Mar 16 09:08:33 fred kernel: [83796.001187] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83796.001188] RSP: 002b:00007ffd6473e1b0 
EFLAGS: 00010206
  Mar 16 09:08:33 fred kernel: [83796.001189] RAX: 00007fadf4a70230 RBX: 
0000558a93ee7ae8 RCX: 00007fadf7aea58a
  Mar 16 09:08:33 fred kernel: [83796.001190] RDX: 0000000000000001 RSI: 
0000558a93ee7b60 RDI: 0000000000000004
  Mar 16 09:08:33 fred kernel: [83796.001191] RBP: 00007ffd6473e250 R08: 
00007ffd6475a090 R09: 00007ffd6473e1e8
  Mar 16 09:08:33 fred kernel: [83796.001192] R10: 000000000002bf20 R11: 
0000000000000246 R12: 0000000000000000
  Mar 16 09:08:33 fred kernel: [83796.001193] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ee7ae8
  Mar 16 09:08:33 fred kernel: [83806.240906] INFO: task jbd2/dm-1-8:1142 
blocked for more than 10 seconds.
  Mar 16 09:08:33 fred kernel: [83806.240909]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83806.240910] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83806.240912] jbd2/dm-1-8     D    0  1142      
2 0x80004000
  Mar 16 09:08:33 fred kernel: [83806.240914] Call Trace:
  Mar 16 09:08:33 fred kernel: [83806.240920]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83806.240923]  ? __switch_to_asm+0x40/0x70
  Mar 16 09:08:33 fred kernel: [83806.240925]  ? __switch_to_asm+0x34/0x70
  Mar 16 09:08:33 fred kernel: [83806.240927]  ? bit_wait_timeout+0xa0/0xa0
  Mar 16 09:08:33 fred kernel: [83806.240928]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83806.240930]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83806.240931]  bit_wait_io+0x11/0x50
  Mar 16 09:08:33 fred kernel: [83806.240933]  __wait_on_bit+0x33/0xa0
  Mar 16 09:08:33 fred kernel: [83806.240935]  out_of_line_wait_on_bit+0x8d/0xb0
  Mar 16 09:08:33 fred kernel: [83806.240938]  ? var_wake_function+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83806.240940]  __wait_on_buffer+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83806.240942]  
jbd2_journal_commit_transaction+0x139f/0x17e8
  Mar 16 09:08:33 fred kernel: [83806.240945]  kjournald2+0xb6/0x280
  Mar 16 09:08:33 fred kernel: [83806.240947]  ? wait_woken+0x80/0x80
  Mar 16 09:08:33 fred kernel: [83806.240949]  kthread+0x104/0x140
  Mar 16 09:08:33 fred kernel: [83806.240951]  ? commit_timeout+0x20/0x20
  Mar 16 09:08:33 fred kernel: [83806.240952]  ? kthread_park+0x90/0x90
  Mar 16 09:08:33 fred kernel: [83806.240954]  ret_from_fork+0x35/0x40
  Mar 16 09:08:33 fred kernel: [83806.240987] INFO: task postgres:2052 blocked 
for more than 30 seconds.
  Mar 16 09:08:33 fred kernel: [83806.240988]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83806.240989] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83806.240990] postgres        D    0  2052   
1787 0x00004000
  Mar 16 09:08:33 fred kernel: [83806.240992] Call Trace:
  Mar 16 09:08:33 fred kernel: [83806.240994]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83806.240996]  ? __schedule+0x2eb/0x740
  Mar 16 09:08:33 fred kernel: [83806.240998]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83806.240999]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83806.241002]  wait_on_page_bit+0x11c/0x200
  Mar 16 09:08:33 fred kernel: [83806.241004]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83806.241006]  wait_on_page_writeback+0x43/0x90
  Mar 16 09:08:33 fred kernel: [83806.241008]  shmem_swapin_page+0x23b/0x660
  Mar 16 09:08:33 fred kernel: [83806.241010]  ? xas_load+0xd/0x80
  Mar 16 09:08:33 fred kernel: [83806.241011]  ? find_get_entry+0x5e/0x170
  Mar 16 09:08:33 fred kernel: [83806.241013]  shmem_getpage_gfp+0x3c8/0x940
  Mar 16 09:08:33 fred kernel: [83806.241016]  ? page_add_file_rmap+0xff/0x1a0
  Mar 16 09:08:33 fred kernel: [83806.241018]  shmem_fault+0x79/0x210
  Mar 16 09:08:33 fred kernel: [83806.241020]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83806.241021]  do_fault+0x38b/0x640
  Mar 16 09:08:33 fred kernel: [83806.241023]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83806.241025]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83806.241027]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83806.241030]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83806.241031]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83806.241033]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83806.241035] RIP: 0033:0x558a9313e3fc
  Mar 16 09:08:33 fred kernel: [83806.241039] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83806.241040] RSP: 002b:00007ffd6473e160 
EFLAGS: 00010202
  Mar 16 09:08:33 fred kernel: [83806.241042] RAX: 00007fadf4a72d40 RBX: 
0000558a93ef2000 RCX: 00007fadf7aea58a
  Mar 16 09:08:33 fred kernel: [83806.241042] RDX: 0000000000000001 RSI: 
0000558a93ef2078 RDI: 0000000000000004
  Mar 16 09:08:33 fred kernel: [83806.241043] RBP: 00007ffd6473e200 R08: 
00007ffd6475a090 R09: 00007ffd6473e198
  Mar 16 09:08:33 fred kernel: [83806.241044] R10: 0000000000001388 R11: 
0000000000000246 R12: 0000000000000000
  Mar 16 09:08:33 fred kernel: [83806.241045] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ef2000
  Mar 16 09:08:33 fred kernel: [83806.241047] INFO: task postgres:2055 blocked 
for more than 20 seconds.
  Mar 16 09:08:33 fred kernel: [83806.241049]       Tainted: G           OE     
5.4.0-65-generic #73-Ubuntu
  Mar 16 09:08:33 fred kernel: [83806.241050] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Mar 16 09:08:33 fred kernel: [83806.241051] postgres        D    0  2055   
1787 0x00000000
  Mar 16 09:08:33 fred kernel: [83806.241052] Call Trace:
  Mar 16 09:08:33 fred kernel: [83806.241054]  __schedule+0x2e3/0x740
  Mar 16 09:08:33 fred kernel: [83806.241056]  schedule+0x42/0xb0
  Mar 16 09:08:33 fred kernel: [83806.241057]  io_schedule+0x16/0x40
  Mar 16 09:08:33 fred kernel: [83806.241059]  wait_on_page_bit+0x11c/0x200
  Mar 16 09:08:33 fred kernel: [83806.241061]  ? file_fdatawait_range+0x30/0x30
  Mar 16 09:08:33 fred kernel: [83806.241062]  wait_on_page_writeback+0x43/0x90
  Mar 16 09:08:33 fred kernel: [83806.241064]  shmem_swapin_page+0x23b/0x660
  Mar 16 09:08:33 fred kernel: [83806.241065]  ? xas_load+0xd/0x80
  Mar 16 09:08:33 fred kernel: [83806.241067]  ? find_get_entry+0x5e/0x170
  Mar 16 09:08:33 fred kernel: [83806.241069]  shmem_getpage_gfp+0x3c8/0x940
  Mar 16 09:08:33 fred kernel: [83806.241071]  ? page_add_file_rmap+0xff/0x1a0
  Mar 16 09:08:33 fred kernel: [83806.241073]  shmem_fault+0x79/0x210
  Mar 16 09:08:33 fred kernel: [83806.241075]  __do_fault+0x3c/0x130
  Mar 16 09:08:33 fred kernel: [83806.241077]  do_fault+0x38b/0x640
  Mar 16 09:08:33 fred kernel: [83806.241078]  __handle_mm_fault+0x4c5/0x7a0
  Mar 16 09:08:33 fred kernel: [83806.241080]  handle_mm_fault+0xca/0x200
  Mar 16 09:08:33 fred kernel: [83806.241082]  do_user_addr_fault+0x1f9/0x450
  Mar 16 09:08:33 fred kernel: [83806.241084]  __do_page_fault+0x58/0x90
  Mar 16 09:08:33 fred kernel: [83806.241086]  do_page_fault+0x2c/0xe0
  Mar 16 09:08:33 fred kernel: [83806.241088]  page_fault+0x34/0x40
  Mar 16 09:08:33 fred kernel: [83806.241089] RIP: 0033:0x558a9313e3fc
  Mar 16 09:08:33 fred kernel: [83806.241091] Code: Bad RIP value.
  Mar 16 09:08:33 fred kernel: [83806.241091] RSP: 002b:00007ffd6473e1b0 
EFLAGS: 00010206
  Mar 16 09:08:33 fred kernel: [83806.241092] RAX: 00007fadf4a70230 RBX: 
0000558a93ee7ae8 RCX: 00007fadf7aea58a
  Mar 16 09:08:33 fred kernel: [83806.241093] RDX: 0000000000000001 RSI: 
0000558a93ee7b60 RDI: 0000000000000004
  Mar 16 09:08:33 fred kernel: [83806.241094] RBP: 00007ffd6473e250 R08: 
00007ffd6475a090 R09: 00007ffd6473e1e8
  Mar 16 09:08:33 fred kernel: [83806.241095] R10: 000000000002bf20 R11: 
0000000000000246 R12: 0000000000000000
  Mar 16 09:08:33 fred kernel: [83806.241095] R13: 0000000000000008 R14: 
0000000000000001 R15: 0000558a93ee7ae8
  Mar 16 09:08:39 fred kernel: [83928.308140] traps: xfsettingsd[122296] trap 
int3 ip:7fcd760100b5 sp:7ffd7572ec90 error:0 in 
libglib-2.0.so.0.6400.6[7fcd75fd4000+84000]
  Mar 16 09:08:39 fred kernel: [83928.717467] traps: xfsettingsd[122307] trap 
int3 ip:7f94c19360b5 sp:7ffef2059750 error:0 in 
libglib-2.0.so.0.6400.6[7f94c18fa000+84000]
  Mar 16 09:08:44 fred kernel: [83933.156936] rfkill: input handler disabled
  Mar 16 09:08:56 fred kernel: [83945.709903] rfkill: input handler enabled

  
  Any hints as to what might cause this would be appreciated.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-65-generic 5.4.0-65.73
  ProcVersionSignature: Ubuntu 5.4.0-65.73-generic 5.4.78
  Uname: Linux 5.4.0-65-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.16
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  rav       122285 F.... pulseaudio
   /dev/snd/pcmC1D0p:   rav       122285 F...m pulseaudio
   /dev/snd/controlC0:  rav       122285 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: XFCE
  Date: Tue Mar 16 10:09:17 2021
  HibernationDevice:
   #RESUME=UUID=8dbbb84c-f32c-453a-821d-f37b58b59df7
   RESUME=/dev/mapper/cryptlvm-cryptswap
  InstallationDate: Installed on 2016-02-27 (1844 days ago)
  InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: Dell Inc. XPS 13 9350
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-65-generic 
root=UUID=df492f2c-70a5-4489-b320-b5e3e9403a9f ro text console=ttyUSB0,115200 
console=tty0 resume=UUID=117c988b-5c85-4d03-85d6-46fa2fd2a30f 
crashkernel=512M-:192M
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-65-generic N/A
   linux-backports-modules-5.4.0-65-generic  N/A
   linux-firmware                            1.187.9
  SourcePackage: linux
  UpgradeStatus: Upgraded to focal on 2021-02-16 (27 days ago)
  dmi.bios.date: 01/16/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.7.0
  dmi.board.name: 09JHRY
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.7.0:bd01/16/2018:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn09JHRY:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.family: NULL
  dmi.product.name: XPS 13 9350
  dmi.product.sku: 0704
  dmi.sys.vendor: Dell Inc.

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