Xorg 7.5 freezes after Linux kernel upgrade

[Jerome Glisse]

On Thu, Nov 25, 2010 at 5:29 PM, Jeremy Henty <onepoint at starurchin.org> wrote:
> On Wed, Nov 24, 2010 at 11:39:18AM -0500, Alex Deucher wrote:
>> 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.
>> Do you have kms enabled in your kernel config?
>
> On both my current kernel and the new one, grepping the config for KMS
> gives:
>
> CONFIG_DRM_KMS_HELPER=y
> # CONFIG_DRM_RADEON_KMS is not set
>
> Does that  make sense?  I generated  the new kernel  config with "make
> oldconfig" and  chose default options everywhere  (except for enabling
> some of the new netfilter/iptables targets).
>
>> Try booting with radeon.modeset=0 on the kernel command line
>
> No change, I'm afraid; same result, identical X server logs.
>
>> or make sure the radeon drm is loaded before starting X.
>
> My kernel in non-modular so I think that's not an issue.
>
> Thanks for your help,
>
> Jeremy Henty

Non KMS path are kind of depreciated, we don't intend to support them,
you should better try enabling KMS and see if it works. If it doesn't
open a bug against KMS (we will most likely ignore UMS bug)

Cheers,
Jerome Glisse