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Bug#566519: [xserver-xorg-video-intel] Occasionally freezes system when using KVM switch



Jakob Lell <jakob@cs.tu-berlin.de> (23/01/2010):
> Package: xserver-xorg-video-intel
> Version: 2:2.9.1-2
> Severity: important

Hi,

> I have recently installed a KVM switch. When switching to another
> computer and back again, the xserver sometimes freezes.

that reminds me of some plug/unplug (which is I guess what happens
from a machine point of view when the KVM switch happens) issues I've
seen fixed in the 2.6.32.y stable updates.

> In this situation, switching to a console using [ctrl]+[alt]+[f1]
> doesn't work any more. The system neither reacts on keyboard input
> nor on a usb mouse any more. However, the mouse cursor does move
> when using the notebook touchpad (but mouse buttons don't work).

Having a cursor moving but buttons not responding is usually a bad
sign for X' state. :)

> The sysreq functionality is still working. I've attached a log file
> of the problem. It contains a segfault and the message "[mi] EQ
> overflowing. The server is probably stuck in an infinite loop.".

> Kernel: Linux 2.6.32-trunk-686

That means 2.6.32-5 at best, could you try with 2.6.32-9 (from sid)
and 2.6.33* (from experimental) and see whether one of those helps?

I'm not sure this particular issue is fixed in latest kernels, but I
guess it would be nice to be sure about what happens with current
kernels.


Mraw,
KiBi.

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