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Old 02-11-2009, 07:22 AM   #1
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Kernel panic when using PS/2 mouse

Recently I decided to upgrade from kernel version 2.27.7 to 2.28.4 in an effort to fix some PS/2 mouse troubles (random erratic behavior not fixed by any other method). However, when I first booted up with the new kernel, I received this error:
CPU0: Machine Check Exception: 0000000000000004
CPU0: Bank 4: 3200000000070f0f
Kernel panic - not syncing: CPU context corrupt
Now I know that this is a MCE error and that it's "correctable" by either recompiling the kernel without support for the checking, or by passing "nomce" to my kernel at the lilo prompt.

What I noticed that was strange about this was that once I booted up with the older kernel, started using a USB mouse, recompiled the kernel without some CPU options (mainly those pertaining to Athlon 64), and rebooted with that new kernel, everything worked fine. But when I plugged in my either of my PS/2 mice while the computer was running, it wouldn't work. Reloading the psmouse kernel module did nothing.

When I rebooted again with the PS/2 mouse plugged in, I got the same kernel panic as above.

I tried this several more times and indeed, it was just the PS/2 mouse being plugged in a boot time that caused the error.

The two PS/2 mice that I used are:
  • Belkin 3-button "Serial & PS/2 Mouse" (switch on bottom with the options PC AT and MS AM)
  • no-name two-button wireless mouse w/ scroll wheel

Currently I'm using an Apple mouse (with only one button!) and while usable, it's quite a pain without at least one other button.

I'm currently running on an Athlon 64 3000+, 1.25G of [working] RAM, and a Giga-byte K8NS-Ultra 939 motherboard.

So what could be causing a kernel panic when the only thing that changes is the addition of a PS/2 mouse?

I will post any other information needed.
Old 02-11-2009, 07:41 AM   #2
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I'm not sure if it will fix it, but you might make sure you have compiled in support for old-style /dev/psaux. I'm using this on a machine here running linux-2.6.27.x
Also, you might try using the latest 2.6.27.x instead of 2.6.28. The 2.6.27 series is being maintained long-term by Adrien Bunk, so the problem is more likely to be fixed (for good) in that series.
Old 02-11-2009, 07:47 AM   #3
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I'll check that out, 2.6.27.x. I'll report back here if it fixes it.

Any other ideas while I'm waiting to download/compile?

Edit: If there's one thing that using this Apple mouse is good for, it's making me learn the different keyboard shortcuts for everything. :P

Last edited by Noddegamra; 02-11-2009 at 07:50 AM.
Old 02-11-2009, 06:40 PM   #4
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So I've finally finished testing the new kernel (v2.6.27.15), and the results are not good.
No matter which mouse I used, whether it was the PS/2 or the USB, I got the same MCE error.

So I just added "nomce" to my kernel options, and everything is running fine so far.


kernel, mouse

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