Public bug reported:
I recently upgraded a working Ubuntu desktop (host "canth") to 9.10
(karmic).
Now with the default kernel 2.6.31-14.48, the machine seems to boot up
fine, and I can log in at the X console successfully, but shortly after
I start actually using the machine interactively, it locks up
completely. The lock up is very hard, keyboard does not work, ctrl-alt-
delete does nothing, no response at all when I try to ping the machine
from another desktop. I must do a hardware reset.
However, if I tell grub to instead use the older 2.6.28-15.52 kernel,
the system appears to work just fine.
I've captured the /var/log/messages showing both the bad and working
kernel.
Note that I've run the various version (uname -a, etc.) commands you
suggest, but with the GOOD kernel, not the bad one. I will try to
reboot the machine to the bad kernel and keep it working long enough to
run those diagnostics, but it will probably lock up before I can.
[...@canth ~]$ uname -a
Linux canth 2.6.28-15-generic #52-Ubuntu SMP Wed Sep 9 10:48:52 UTC 2009 x86_64
GNU/Linux
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
After upgrade to Ubuntu 9.10, system locks up hard with kernel 2.6.31-14.48,
works fine with 2.6.28-15.52
https://bugs.launchpad.net/bugs/482586
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