BZ #198121, #197145: Re-add dropped linux-2.6-drm-cripple-r300.patch to v2.6.17

[Adam Jackson]

Chuck Anderson wrote:
> On Tue, Jul 25, 2006 at 06:16:07PM -0400, Adam Jackson wrote:
>> Chuck Anderson wrote:
>>> I'm running FC5 right now with this patch re-added, and it solves BZ 
>>> #197145 "Kernel 2.6.17-1.2139_FC5 freezes System completely".  I 
>>> looked at the rawhide kernel-2.6.17-1.2445.fc6 and noticed that the 
>>> patch is missing there too, so I'd like to bring this to the attention 
>>> of the developers so that the issue is fixed in devel/FC6 as well.
>>>
>>> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=198121
>>>
>>> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=197145
>> You do know that by doing this, you prevent DRI from ever getting fixed 
>> for that hardware, right?
> 
> Ok, you've got my attention.  What can I do to troubleshoot this issue 
> and help find the solution?  Do I need to set up GDB remote serial 
> debugging?

Serial console or ssh.  Enable drm debugging (echo 1 > 
/sys/module/drm/parameters/debug), and get your kernel messages spewing 
somewhere you can see them, either syslog or serial or whatever.

That should at least give us some idea of what's going wrong before the 
system hangs.  Of course, if it's not actually wedging the machine but 
just hanging X, then this all gets much easier.

- ajax