Public bug reported:
Binary package hint: linux-image-2.6.35-25-generic
lsb_release -rd:
Description: Ubuntu 10.10
Release: 10.10
Kernel: Linux 2.6.35-25-generic
Only happened to me when i wasn't in front of the laptop.. so i thought
it is related with powersave options but i disabled suspend and even
block screen so it shouldn't be related with that anymore. I just leave
the laptop working and (not always) when i come back the screen is black
(turned off actually) and nothing is responding. Also CPU must be 100%
cause the cooling system is working really fast.
These are the last line in /var/log/kernel before the hang (notice the
last line: system_call_fastpath+0x16/0x1b):
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487157] INFO: task dpkg:6001
blocked for more than 120 seconds.
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487160] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487163] dpkg D
00000001001c2945 0 6001 1 0x00000004
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487169] ffff880029f0bce8
0000000000000082 ffff8800ffffffff 0000000000015980
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487173] ffff880029f0bfd8
0000000000015980 ffff880029f0bfd8 ffff8800184cadc0
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487177] 0000000000015980
0000000000015980 ffff880029f0bfd8 0000000000015980
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487182] Call Trace:
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487190] [<ffffffff81588c7d>]
schedule_timeout+0x22d/0x310
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487195] [<ffffffff8104edc2>] ?
enqueue_entity+0x132/0x1b0
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487199] [<ffffffff8104f283>] ?
enqueue_task_fair+0x43/0x90
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487203] [<ffffffff81052cf7>] ?
enqueue_task+0x77/0x90
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487206] [<ffffffff8158885b>]
wait_for_common+0xdb/0x180
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487210] [<ffffffff81056a00>] ?
default_wake_function+0x0/0x20
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487214] [<ffffffff815889dd>]
wait_for_completion+0x1d/0x20
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487219] [<ffffffff81175e73>]
writeback_inodes_sb+0xb3/0xe0
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487222] [<ffffffff8117acf0>] ?
sync_one_sb+0x0/0x30
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487225] [<ffffffff8117ac9e>]
__sync_filesystem+0x4e/0xa0
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487228] [<ffffffff8117ad10>]
sync_one_sb+0x20/0x30
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487233] [<ffffffff8115550b>]
iterate_supers+0x8b/0xd0
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487236] [<ffffffff8117ad4f>]
sys_sync+0x2f/0x70
Feb 15 18:13:55 Diego-Laptop kernel: [20028.487241] [<fffffDescription:
Ubuntu 10.10
Release: 10.10
fff8100a0f2>] system_call_fastpath+0x16/0x1b
Also might be important this: the first lines on kernel log i got are (when i
boot my laptop):
Feb 15 20:22:56 Diego-Laptop kernel: [27763.688118] Corrupted low memory at
ffff880000006598 (6598 phys) = 1d0000000000
Feb 15 20:23:0Feb 15 20:24:30 Diego-Laptop kernel: imklog 4.2.0, log source =
/proc/kmsg started.
Feb 15 20:24:30 Diego-Laptop kernel: [ 0.000000] Initializing cgroup subsys
cpuset
Feb 15 20:24:30 Diego-Laptop kernel: [ 0.000000] Initializing cgroup subsys
cpu
Feb 15 20:24:30 Diego-Laptop kernel: [ 0.000000] Linux version
2.6.35-25-generic (buildd@crested) (gcc version 4.4.5 (Ubuntu/Linaro
4.4.4-14ubuntu5) ) #44-Ubuntu SMP Fri Jan 21 17:40:44 UTC 2011 (Ubuntu
2.6.35-25.44-generic 2.6.35.10)
But i checked for ram memory issues with several programs and it
shouldn't be a physical problem.
** Affects: linux-lts-backport-maverick (Ubuntu)
Importance: Undecided
Status: New
** Tags: black kernel screen
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https://bugs.launchpad.net/bugs/719621
Title:
laptop hangs randomly with high cpu usage and black screen
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