I've been testing various kernel versions including long obsolete ones -- all
seem to exhibit oopses under some system stress.
One kernel version, in particular, lucid Ubuntu-2.6.32-24.40, dated
Mon Aug 9 11:31:58 2010 produced hard locks without traces in the logs.
This was pretty strange for me since I remember to be quite happy with my
system up to November-December 2011, when this "oopsing nightmare" started. My
guess was a hardware failure. When the memory was tested for about 50 hours
without a single error, the matter became even more interesting, since I could
not find much in the net on hardware issues involving something other than
RAM (given my type of CPU that can't apparently be logged on errors). So what
was it than? My next candidate was the redeon driver (that is pretty buggy and
still has no way to resume from suspend-to-RAM). I forgot about suspend-to-disk
that I use in lieu of the former. The reason I did not check it was the fact
1) the issue came weeks (or a month) later I started using it, well, I had a
problem of unreliable hibernates, when had a system crash after a number of
successful hibernates/resumes during the process
2) pretty much all kernel versions, some going back a year or so had it.
A reason that the bug is not reported might be that pm-hibernate seems to be
less preferred compared to pm-suspend, I can't use.
Now I report that I had no oopses and/or crashes
uptime
02:13:31 up 9 days, 2:00, 10 users, load average: 0.00, 0.01, 0.05
uname -a
Linux 2.6.38-14-generic #58-Ubuntu SMP Tue Mar 27 18:48:46 UTC 2012 i686 i686
i386 GNU/Linux
One process nm-applet now has a definite memory leak and needs to be killed and
restarted every couple days (however it does not give much trouble)
-
So I am changing the subject of the bug.
# this message was sent with Mutt and composed in GNU Emacs
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/922976
Title:
pm-hibernate memory corruption - Oopses, unable to handle kernel
paging request, EIP is at kmem_cache_alloc+0x50/0x100
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