Radeon r6xx with KMS not working

[Mike Lothian]

2009/9/8 Mike Lothian <mike at fireburn.co.uk>:
> 2009/9/8 Alex Deucher <alexdeucher at gmail.com>:
>> On Tue, Sep 8, 2009 at 6:34 PM, Mike Lothian<mike at fireburn.co.uk> wrote:
>>> Hi
>>>
>>> When using the new drm-next branch KMS fails (see attached logs) with
>>> radeon.modeset=0 passed the computer will hard lockup when KDM is
>>> starting (I think this is when the compositing is started)
>>
>> [drm:r600_ib_test] *ERROR* radeon: fence wait failed (-16).
>> [drm:rv770_init] *ERROR* radeon: failled testing IB (-16).
>>
>> Pull the latest from the drm-next branch.
>>
>> Alex
>>
>
> Just noticed that after Perry pointed out the fix on Phoronix
>
> Thanks
>
> Will let you know how I get on
>

The good news is that KMS now works, the bad news is KDM still wont
start with compositing. Plain X works and glxgears work as does KDM
with compositing off

Glxgears says:
IRQ's not enabled, falling back to busy waits: 2 1
do_wait: drmWaitVBlank returned -1, IRQs don't seem to be working correctly.

My dmesg says:

Unpin not necessary for ffff88007c9a1600 !
Unpin not necessary for ffff88006eda6400 !
Unpin not necessary for ffff88006b14d400 !

I couldn't see anything in my Xorg.0.log file that would explain why
KDM keeps rebooting

Is there anything else that might be useful?