Bug#508859: xserver-xorg: xorg hangs randomly (+reproduceable) and uses then 98% CPU

[Peter Weil <peter.weil.2k7@googlemail.com>]

On Wed, Feb 4, 2009 at 7:50 PM, Brice Goglin <Brice.Goglin@ens-lyon.org> wrote:
> Peter Weil wrote:
>> 5 minutes ago it crashed again while viewing a pdf file in KPDF.
>>
>> So xserver-xorg-video-radeon 1:6.10.0-2 didn't fix the problem.
>>
>
> A crash and a hang are different problems. Please describe precisely
> what's happening now and what was happening in the original bug report.
>
> If it's a crash, you should get back to the login screen. Look at the
> end of the log (might be in Xorg.0.log.old if X restarted), there should
> be a backtrace there.
>
> Brice


Ok, sorry. No crash.
It hangs as described in the original bug report.
Xorg uses 100% CPU and is unkillable.

strace of xorg:
rt_sigreturn(0xe)                       = -1 EBUSY (Device or resource busy)
ioctl(10, 0x6444, 0)                    = -1 EBUSY (Device or resource busy)
--- SIGALRM (Alarm clock) @ 0 (0) ---
rt_sigreturn(0xe)                       = -1 EBUSY (Device or resource busy)
ioctl(10, 0x6444, 0)                    = -1 EBUSY (Device or resource busy)
--- SIGALRM (Alarm clock) @ 0 (0) ---
rt_sigreturn(0xe)                       = -1 EBUSY (Device or resource busy)
ioctl(10, 0x6444, 0)                    =

Peter