Xorg 7.5 freezes after Linux kernel upgrade

[Alex Deucher]

On Wed, Nov 24, 2010 at 11:02 AM, Jeremy Henty <onepoint at starurchin.org> wrote:
>
> I am currently happily running Xorg 7.5 on Linux kernel 2.6.35.8 .  If
> I upgrade  the kernel to 2.6.36  the screen goes black  (even with the
> -retro  argument)   and  the  system  locks   up.   Ctrl-Alt-F<n>  and
> Ctrl-Alt-Del  do  nothing, but  Alt-SysRq-r  followed by  Ctrl-Alt-Del
> reboots cleanly.
>
> Any ideas?  I  am attaching before/after logs.  I  created each one in
> the same way: reboot, log  in as root, run "Xorg -retro", Alt-SysRq-r,
> Ctrl-Alt-Del, reboot  again and save  a copy of  /var/log/Xorg.0.log .
> Apart from changes  of memory addresses, timestamps etc.,  the new log
> is just an initial segment of the old, suggesting that Xorg just stops
> completely while initialising.
>
> Thanks in advance for any help.

Do you have kms enabled in your kernel config?  Try booting with
radeon.modeset=0 on the kernel command line or make sure the radeon
drm is loaded before starting X.

Alex

>
> Regards,
>
> Jeremy Henty
>
>
> System details:
>
> uname -a
> Linux omphalos 2.6.35.8-0 #1 SMP PREEMPT Sun Oct 31 20:23:43 GMT 2010 i686 athlon-4 i386 GNU/Linux
>
> gcc --version
> gcc (GCC) 4.4.1
>
> Xorg: xorg-server-1.7.1
> driver: xf86-video-ati-6.12.4
> libdrm: libdrm-2.4.14
>
> Graphics card: ATI Radeon 9250 PCI
>
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