[Bug 338645] [NEW] linux freezes completely since 2.6.28-7

[Martin]

Public bug reported:

Binary package hint: linux-image

Since linux-image-2.6.28-7-generic my system often completely freezes:
- screen is completely frozen, even the mouse
- audio playback stops
- keyboard is unresponsive (numlock don't change the LED state)
- sysrq doesn't work

In /etc/sysctl.conf I have:
kernel.panic_on_oops = 1
kernel.panic = 10

but after the freeze the computer never reboots. I see nothing special in the dmesg nor other logs.
The freeze occurs when computer is under heavy load, mostly CPU load (it is happening almost exclusively when I run Eclipse and it starts resolving Ivy dependencies between more than 100 projects; the same if I am resolving dependencies and compiling all projects with ant script; this takes cca 10 minutes, and sometimes it finishes without freezing the computer). I also tried cpustress utils and memtest86+, but no freeze occurred. I also watched CPU temperature while doing that critical operations and all was in normal.  With the linux-image-2.6.28-6-generic (2.6.28-6.17) there are also no freezes.

My computer is IBM ThinkPad Z60m. I am running latest Kubuntu Jaunty
(updated 2009-03-06), using opensource ATI drivers (occurs regardless of
desktop effects on/off), ext4.

Please tell me what should I try to configure to get kernel dump after
crash.

Attaching relevant files. Thanks in advance.

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

-- 
linux freezes completely since 2.6.28-7
https://bugs.launchpad.net/bugs/338645
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux-meta in ubuntu.