apport information

** Attachment added: "ProcCpuinfo.txt"
   
https://bugs.launchpad.net/bugs/1773392/+attachment/5145445/+files/ProcCpuinfo.txt

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https://bugs.launchpad.net/bugs/1773392

Title:
  zfs hangs on mount/unmount

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I am running lxd 3.0 on ubuntu 18.04 with kernel 4.15.0-22-generic and
  4.15.0-20-generic (same behaviour) with zfs backend (0.7.5-1ubuntu16;
  also tried 0.7.9).

  Sometimes lxd hangs when I try to stop / restart or "stop && move"
  some containers. Furhter investigation showed that problem is in zfs
  mount or unmount: it just hangs and lxd just wait it. Also commands
  like "zfs list" hangs to.

  It seems that it is not lxd or zfs issue, but kernel bug?
  https://github.com/lxc/lxd/issues/4104#issuecomment-392072939

  I have one test ct that always hangs on restart, so here is info:

  dmesg:
  [ 1330.390938] INFO: task txg_sync:9944 blocked for more than 120 seconds.
  [ 1330.390994]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1330.391044] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1330.391101] txg_sync        D    0  9944      2 0x80000000
  [ 1330.391105] Call Trace:
  [ 1330.391117]  __schedule+0x297/0x8b0
  [ 1330.391122]  schedule+0x2c/0x80
  [ 1330.391136]  cv_wait_common+0x11e/0x140 [spl]
  [ 1330.391141]  ? wait_woken+0x80/0x80
  [ 1330.391152]  __cv_wait+0x15/0x20 [spl]
  [ 1330.391234]  rrw_enter_write+0x3c/0xa0 [zfs]
  [ 1330.391306]  rrw_enter+0x13/0x20 [zfs]
  [ 1330.391380]  spa_sync+0x7c9/0xd80 [zfs]
  [ 1330.391457]  txg_sync_thread+0x2cd/0x4a0 [zfs]
  [ 1330.391534]  ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
  [ 1330.391543]  thread_generic_wrapper+0x74/0x90 [spl]
  [ 1330.391549]  kthread+0x121/0x140
  [ 1330.391558]  ? __thread_exit+0x20/0x20 [spl]
  [ 1330.391562]  ? kthread_create_worker_on_cpu+0x70/0x70
  [ 1330.391566]  ? kthread_create_worker_on_cpu+0x70/0x70
  [ 1330.391569]  ret_from_fork+0x35/0x40
  [ 1330.391582] INFO: task lxd:12419 blocked for more than 120 seconds.
  [ 1330.391630]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1330.391679] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1330.391735] lxd             D    0 12419      1 0x00000000
  [ 1330.391739] Call Trace:
  [ 1330.391745]  __schedule+0x297/0x8b0
  [ 1330.391749]  schedule+0x2c/0x80
  [ 1330.391752]  rwsem_down_write_failed+0x162/0x360
  [ 1330.391808]  ? dbuf_rele_and_unlock+0x1a8/0x4b0 [zfs]
  [ 1330.391814]  call_rwsem_down_write_failed+0x17/0x30
  [ 1330.391817]  ? call_rwsem_down_write_failed+0x17/0x30
  [ 1330.391821]  down_write+0x2d/0x40
  [ 1330.391825]  grab_super+0x30/0x90
  [ 1330.391901]  ? zpl_create+0x160/0x160 [zfs]
  [ 1330.391905]  sget_userns+0x91/0x490
  [ 1330.391908]  ? get_anon_bdev+0x100/0x100
  [ 1330.391983]  ? zpl_create+0x160/0x160 [zfs]
  [ 1330.391987]  sget+0x7d/0xa0
  [ 1330.391990]  ? get_anon_bdev+0x100/0x100
  [ 1330.392066]  zpl_mount+0xa8/0x160 [zfs]
  [ 1330.392071]  mount_fs+0x37/0x150
  [ 1330.392077]  vfs_kern_mount.part.23+0x5d/0x110
  [ 1330.392080]  do_mount+0x5ed/0xce0
  [ 1330.392083]  ? copy_mount_options+0x2c/0x220
  [ 1330.392086]  SyS_mount+0x98/0xe0
  [ 1330.392092]  do_syscall_64+0x73/0x130
  [ 1330.392096]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [ 1330.392099] RIP: 0033:0x4db36a
  [ 1330.392101] RSP: 002b:000000c4207fa768 EFLAGS: 00000216 ORIG_RAX: 
00000000000000a5
  [ 1330.392104] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 
00000000004db36a
  [ 1330.392106] RDX: 000000c4205984cc RSI: 000000c420a6ee00 RDI: 
000000c420a23b60
  [ 1330.392108] RBP: 000000c4207fa808 R08: 000000c4209d4960 R09: 
0000000000000000
  [ 1330.392110] R10: 0000000000000000 R11: 0000000000000216 R12: 
ffffffffffffffff
  [ 1330.392112] R13: 0000000000000039 R14: 0000000000000038 R15: 
0000000000000080
  [ 1330.392123] INFO: task lxd:16725 blocked for more than 120 seconds.
  [ 1330.392171]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1330.392220] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1330.392276] lxd             D    0 16725      1 0x00000002
  [ 1330.392279] Call Trace:
  [ 1330.392284]  __schedule+0x297/0x8b0
  [ 1330.392289]  ? irq_work_queue+0x8d/0xa0
  [ 1330.392293]  schedule+0x2c/0x80
  [ 1330.392297]  io_schedule+0x16/0x40
  [ 1330.392302]  wait_on_page_bit_common+0xd8/0x160
  [ 1330.392305]  ? page_cache_tree_insert+0xe0/0xe0
  [ 1330.392309]  __filemap_fdatawait_range+0xfa/0x160
  [ 1330.392313]  ? _cond_resched+0x19/0x40
  [ 1330.392317]  ? bdi_split_work_to_wbs+0x45/0x2c0
  [ 1330.392321]  ? _cond_resched+0x19/0x40
  [ 1330.392324]  filemap_fdatawait_keep_errors+0x1e/0x40
  [ 1330.392327]  sync_inodes_sb+0x20d/0x2b0
  [ 1330.392333]  __sync_filesystem+0x1b/0x60
  [ 1330.392336]  sync_filesystem+0x39/0x40
  [ 1330.392340]  generic_shutdown_super+0x27/0x120
  [ 1330.392343]  kill_anon_super+0x12/0x20
  [ 1330.392419]  zpl_kill_sb+0x1a/0x20 [zfs]
  [ 1330.392423]  deactivate_locked_super+0x48/0x80
  [ 1330.392427]  deactivate_super+0x40/0x60
  [ 1330.392430]  cleanup_mnt+0x3f/0x80
  [ 1330.392434]  __cleanup_mnt+0x12/0x20
  [ 1330.392438]  task_work_run+0x9d/0xc0
  [ 1330.392442]  exit_to_usermode_loop+0xc0/0xd0
  [ 1330.392445]  do_syscall_64+0x115/0x130
  [ 1330.392449]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [ 1330.392451] RIP: 0033:0x7f0f72115447
  [ 1330.392453] RSP: 002b:00007ffc5bf8f4a0 EFLAGS: 00000293 ORIG_RAX: 
0000000000000003
  [ 1330.392457] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 
00007f0f72115447
  [ 1330.392458] RDX: 0000000000000000 RSI: 0000000002422010 RDI: 
0000000000000010
  [ 1330.392460] RBP: 0000000002443e20 R08: 0000000000000000 R09: 
0000000000000000
  [ 1330.392462] R10: 0000000000000008 R11: 0000000000000293 R12: 
0000000002443e4c
  [ 1330.392464] R13: 0000000000000007 R14: 00007f0f725a7587 R15: 
00007ffc5bf8f520
  [ 1451.194003] INFO: task txg_sync:9944 blocked for more than 120 seconds.
  [ 1451.194061]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1451.194111] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1451.194168] txg_sync        D    0  9944      2 0x80000000
  [ 1451.194172] Call Trace:
  [ 1451.194181]  __schedule+0x297/0x8b0
  [ 1451.194186]  schedule+0x2c/0x80
  [ 1451.194206]  cv_wait_common+0x11e/0x140 [spl]
  [ 1451.194213]  ? wait_woken+0x80/0x80
  [ 1451.194225]  __cv_wait+0x15/0x20 [spl]
  [ 1451.194306]  rrw_enter_write+0x3c/0xa0 [zfs]
  [ 1451.194379]  rrw_enter+0x13/0x20 [zfs]
  [ 1451.194452]  spa_sync+0x7c9/0xd80 [zfs]
  [ 1451.194529]  txg_sync_thread+0x2cd/0x4a0 [zfs]
  [ 1451.194606]  ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
  [ 1451.194616]  thread_generic_wrapper+0x74/0x90 [spl]
  [ 1451.194621]  kthread+0x121/0x140
  [ 1451.194630]  ? __thread_exit+0x20/0x20 [spl]
  [ 1451.194634]  ? kthread_create_worker_on_cpu+0x70/0x70
  [ 1451.194638]  ? kthread_create_worker_on_cpu+0x70/0x70
  [ 1451.194641]  ret_from_fork+0x35/0x40
  [ 1451.194655] INFO: task lxd:12419 blocked for more than 120 seconds.
  [ 1451.194705]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1451.194754] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1451.194810] lxd             D    0 12419      1 0x00000000
  [ 1451.194814] Call Trace:
  [ 1451.194819]  __schedule+0x297/0x8b0
  [ 1451.194824]  schedule+0x2c/0x80
  [ 1451.194827]  rwsem_down_write_failed+0x162/0x360
  [ 1451.194883]  ? dbuf_rele_and_unlock+0x1a8/0x4b0 [zfs]
  [ 1451.194889]  call_rwsem_down_write_failed+0x17/0x30
  [ 1451.194892]  ? call_rwsem_down_write_failed+0x17/0x30
  [ 1451.194895]  down_write+0x2d/0x40
  [ 1451.194900]  grab_super+0x30/0x90
  [ 1451.194975]  ? zpl_create+0x160/0x160 [zfs]
  [ 1451.194979]  sget_userns+0x91/0x490
  [ 1451.194982]  ? get_anon_bdev+0x100/0x100
  [ 1451.195058]  ? zpl_create+0x160/0x160 [zfs]
  [ 1451.195062]  sget+0x7d/0xa0
  [ 1451.195065]  ? get_anon_bdev+0x100/0x100
  [ 1451.195141]  zpl_mount+0xa8/0x160 [zfs]
  [ 1451.195145]  mount_fs+0x37/0x150
  [ 1451.195151]  vfs_kern_mount.part.23+0x5d/0x110
  [ 1451.195154]  do_mount+0x5ed/0xce0
  [ 1451.195157]  ? copy_mount_options+0x2c/0x220
  [ 1451.195161]  SyS_mount+0x98/0xe0
  [ 1451.195165]  do_syscall_64+0x73/0x130
  [ 1451.195169]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [ 1451.195172] RIP: 0033:0x4db36a
  [ 1451.195174] RSP: 002b:000000c4207fa768 EFLAGS: 00000216 ORIG_RAX: 
00000000000000a5
  [ 1451.195178] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 
00000000004db36a
  [ 1451.195180] RDX: 000000c4205984cc RSI: 000000c420a6ee00 RDI: 
000000c420a23b60
  [ 1451.195181] RBP: 000000c4207fa808 R08: 000000c4209d4960 R09: 
0000000000000000
  [ 1451.195183] R10: 0000000000000000 R11: 0000000000000216 R12: 
ffffffffffffffff
  [ 1451.195185] R13: 0000000000000039 R14: 0000000000000038 R15: 
0000000000000080
  [ 1451.195197] INFO: task lxd:16725 blocked for more than 120 seconds.
  [ 1451.195245]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1451.195294] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1451.195349] lxd             D    0 16725      1 0x00000002
  [ 1451.195353] Call Trace:
  [ 1451.195358]  __schedule+0x297/0x8b0
  [ 1451.195363]  ? irq_work_queue+0x8d/0xa0
  [ 1451.195367]  schedule+0x2c/0x80
  [ 1451.195371]  io_schedule+0x16/0x40
  [ 1451.195376]  wait_on_page_bit_common+0xd8/0x160
  [ 1451.195379]  ? page_cache_tree_insert+0xe0/0xe0
  [ 1451.195384]  __filemap_fdatawait_range+0xfa/0x160
  [ 1451.195388]  ? _cond_resched+0x19/0x40
  [ 1451.195391]  ? bdi_split_work_to_wbs+0x45/0x2c0
  [ 1451.195395]  ? _cond_resched+0x19/0x40
  [ 1451.195399]  filemap_fdatawait_keep_errors+0x1e/0x40
  [ 1451.195401]  sync_inodes_sb+0x20d/0x2b0
  [ 1451.195407]  __sync_filesystem+0x1b/0x60
  [ 1451.195410]  sync_filesystem+0x39/0x40
  [ 1451.195414]  generic_shutdown_super+0x27/0x120
  [ 1451.195417]  kill_anon_super+0x12/0x20
  [ 1451.195493]  zpl_kill_sb+0x1a/0x20 [zfs]
  [ 1451.195498]  deactivate_locked_super+0x48/0x80
  [ 1451.195501]  deactivate_super+0x40/0x60
  [ 1451.195504]  cleanup_mnt+0x3f/0x80
  [ 1451.195508]  __cleanup_mnt+0x12/0x20
  [ 1451.195512]  task_work_run+0x9d/0xc0
  [ 1451.195516]  exit_to_usermode_loop+0xc0/0xd0
  [ 1451.195519]  do_syscall_64+0x115/0x130
  [ 1451.195523]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [ 1451.195525] RIP: 0033:0x7f0f72115447
  [ 1451.195527] RSP: 002b:00007ffc5bf8f4a0 EFLAGS: 00000293 ORIG_RAX: 
0000000000000003
  [ 1451.195530] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 
00007f0f72115447
  [ 1451.195532] RDX: 0000000000000000 RSI: 0000000002422010 RDI: 
0000000000000010
  [ 1451.195534] RBP: 0000000002443e20 R08: 0000000000000000 R09: 
0000000000000000
  [ 1451.195536] R10: 0000000000000008 R11: 0000000000000293 R12: 
0000000002443e4c
  [ 1451.195538] R13: 0000000000000007 R14: 00007f0f725a7587 R15: 
00007ffc5bf8f520
  [ 1451.195548] INFO: task zfs:18387 blocked for more than 120 seconds.
  [ 1451.195595]       Tainted: P           O     4.15.0-22-generic #24-Ubuntu
  [ 1451.195644] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [ 1451.195701] zfs             D    0 18387  18374 0x00000000
  [ 1451.195704] Call Trace:
  [ 1451.195709]  __schedule+0x297/0x8b0
  [ 1451.195714]  schedule+0x2c/0x80
  [ 1451.195724]  cv_wait_common+0x11e/0x140 [spl]
  [ 1451.195728]  ? wait_woken+0x80/0x80
  [ 1451.195739]  __cv_wait+0x15/0x20 [spl]
  [ 1451.195812]  rrw_enter_read_impl+0x4e/0x160 [zfs]
  [ 1451.195884]  rrw_enter+0x1c/0x20 [zfs]
  [ 1451.195952]  dsl_pool_hold+0x5a/0x80 [zfs]
  [ 1451.196011]  dmu_objset_hold+0x33/0xa0 [zfs]
  [ 1451.196089]  zfs_ioc_objset_stats+0x32/0xa0 [zfs]
  [ 1451.196167]  zfsdev_ioctl+0x1e0/0x610 [zfs]
  [ 1451.196173]  do_vfs_ioctl+0xa8/0x630
  [ 1451.196178]  ? handle_mm_fault+0xb1/0x1f0
  [ 1451.196183]  ? __do_page_fault+0x270/0x4d0
  [ 1451.196187]  SyS_ioctl+0x79/0x90
  [ 1451.196191]  do_syscall_64+0x73/0x130
  [ 1451.196195]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [ 1451.196197] RIP: 0033:0x7ff184eec5d7
  [ 1451.196198] RSP: 002b:00007ffd6bd71cb8 EFLAGS: 00000246 ORIG_RAX: 
0000000000000010
  [ 1451.196202] RAX: ffffffffffffffda RBX: 00007ffd6bd71ce0 RCX: 
00007ff184eec5d7
  [ 1451.196204] RDX: 00007ffd6bd71ce0 RSI: 0000000000005a12 RDI: 
0000000000000003
  [ 1451.196206] RBP: 00005558b3cc3430 R08: 00005558b3cc5fa0 R09: 
0000000000000000
  [ 1451.196208] R10: fffffffffffff000 R11: 0000000000000246 R12: 
00005558b3cc3430
  [ 1451.196210] R13: 00005558b3cc5380 R14: 0000000000000000 R15: 
0000000000000000


  zfs list: hangs

  # cat /proc/18387/stack    (this is "zfs list" command)
  [<0>] cv_wait_common+0x11e/0x140 [spl]
  [<0>] __cv_wait+0x15/0x20 [spl]
  [<0>] rrw_enter_read_impl+0x4e/0x160 [zfs]
  [<0>] rrw_enter+0x1c/0x20 [zfs]
  [<0>] dsl_pool_hold+0x5a/0x80 [zfs]
  [<0>] dmu_objset_hold+0x33/0xa0 [zfs]
  [<0>] zfs_ioc_objset_stats+0x32/0xa0 [zfs]
  [<0>] zfsdev_ioctl+0x1e0/0x610 [zfs]
  [<0>] do_vfs_ioctl+0xa8/0x630
  [<0>] SyS_ioctl+0x79/0x90
  [<0>] do_syscall_64+0x73/0x130
  [<0>] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [<0>] 0xffffffffffffffff


  # cat /proc/17714/stack     (this is "lxc restart ct" command)
  [<0>] futex_wait_queue_me+0xca/0x130
  [<0>] futex_wait+0x10a/0x250
  [<0>] do_futex+0x325/0x500
  [<0>] SyS_futex+0x13b/0x180
  [<0>] do_syscall_64+0x73/0x130
  [<0>] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [<0>] 0xffffffffffffffff

  # cat /proc/16725/stack     (this is "[lxc monitor] /var/lib/lxd/containers 
ct")
  [<0>] io_schedule+0x16/0x40
  [<0>] wait_on_page_bit_common+0xd8/0x160
  [<0>] __filemap_fdatawait_range+0xfa/0x160
  [<0>] filemap_fdatawait_keep_errors+0x1e/0x40
  [<0>] sync_inodes_sb+0x20d/0x2b0
  [<0>] __sync_filesystem+0x1b/0x60
  [<0>] sync_filesystem+0x39/0x40
  [<0>] generic_shutdown_super+0x27/0x120
  [<0>] kill_anon_super+0x12/0x20
  [<0>] zpl_kill_sb+0x1a/0x20 [zfs]
  [<0>] deactivate_locked_super+0x48/0x80
  [<0>] deactivate_super+0x40/0x60
  [<0>] cleanup_mnt+0x3f/0x80
  [<0>] __cleanup_mnt+0x12/0x20
  [<0>] task_work_run+0x9d/0xc0
  [<0>] exit_to_usermode_loop+0xc0/0xd0
  [<0>] do_syscall_64+0x115/0x130
  [<0>] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [<0>] 0xffffffffffffffff

  # cat /proc/12419/stack      (I don't see this process now)
  [<0>] call_rwsem_down_write_failed+0x17/0x30
  [<0>] grab_super+0x30/0x90
  [<0>] sget_userns+0x91/0x490
  [<0>] sget+0x7d/0xa0
  [<0>] zpl_mount+0xa8/0x160 [zfs]
  [<0>] mount_fs+0x37/0x150
  [<0>] vfs_kern_mount.part.23+0x5d/0x110
  [<0>] do_mount+0x5ed/0xce0
  [<0>] SyS_mount+0x98/0xe0
  [<0>] do_syscall_64+0x73/0x130
  [<0>] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [<0>] 0xffffffffffffffff

  # cat /proc/9944/stack      (this is "[txg_sync]")
  [<0>] cv_wait_common+0x11e/0x140 [spl]
  [<0>] __cv_wait+0x15/0x20 [spl]
  [<0>] rrw_enter_write+0x3c/0xa0 [zfs]
  [<0>] rrw_enter+0x13/0x20 [zfs]
  [<0>] spa_sync+0x7c9/0xd80 [zfs]
  [<0>] txg_sync_thread+0x2cd/0x4a0 [zfs]
  [<0>] thread_generic_wrapper+0x74/0x90 [spl]
  [<0>] kthread+0x121/0x140
  [<0>] ret_from_fork+0x35/0x40
  [<0>] 0xffffffffffffffff


  zpool status -v:
    pool: lxc
   state: ONLINE
    scan: none requested
  config:

          NAME        STATE     READ WRITE CKSUM
          lxc         ONLINE       0     0     0
            lxc       ONLINE       0     0     0

  errors: No known data errors
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 May 25 18:11 seq
   crw-rw---- 1 root audio 116, 33 May 25 18:11 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 18.04
  HibernationDevice: RESUME=/dev/mapper/vg00-swap
  InstallationDate: Installed on 2018-05-24 (3 days ago)
  InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 
(20180426)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lsusb:
   Bus 002 Device 003: ID 046b:ff10 American Megatrends, Inc. Virtual Keyboard 
and Mouse
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Intel Corporation S3420GP
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 mgadrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-22-generic 
root=/dev/mapper/vg00-root ro
  ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-22-generic N/A
   linux-backports-modules-4.15.0-22-generic  N/A
   linux-firmware                             1.173
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  Tags:  bionic
  Uname: Linux 4.15.0-22-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 04/29/2010
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: S3420GP.86B.01.00.0042.042920102218
  dmi.board.asset.tag: ....................
  dmi.board.name: S3420GP
  dmi.board.vendor: Intel Corporation
  dmi.board.version: E51976-405
  dmi.chassis.asset.tag: ....................
  dmi.chassis.type: 17
  dmi.chassis.vendor: ..............................
  dmi.chassis.version: ..................
  dmi.modalias: 
dmi:bvnIntelCorp.:bvrS3420GP.86B.01.00.0042.042920102218:bd04/29/2010:svnIntelCorporation:pnS3420GP:pvr....................:rvnIntelCorporation:rnS3420GP:rvrE51976-405:cvn..............................:ct17:cvr..................:
  dmi.product.name: S3420GP
  dmi.product.version: ....................
  dmi.sys.vendor: Intel Corporation

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