Bug#587999: further info

[Alex Deucher]

2010/7/6 Michel Dänzer <daenzer at debian.org>:
> On Mon, 2010-07-05 at 23:14 +0200, Ulrich Eckhardt wrote:
>> On Monday 05 July 2010 09:03:53 you wrote:
>> > On Sam, 2010-07-03 at 23:58 +0200, Ulrich Eckhardt wrote:
>> > > (EE) RADEON(0): [dri] RADEONDRIGetVersion failed to open the DRM
>> > > [dri] Disabling DRI.
>> >
>> > It should work better with the DRI enabled.
>>
>> Good catch, but shouldn't it work even without DRI?
>
> It should, if someone were to fix the problem(s) with the non-DRI big
> endian XVideo code paths. DRI is generally desirable anyway though as it
> provides significantly better performance across the board.
>
>
>> > If so, please post the output of running
>> >
>> > sudo modprobe radeon
>> >
>> > as well as the messages appearing in the dmesg output after it.
>>
>> The module is already loaded. I can unload it though, even with a running X11
>> session, "lsmod" shows that its refcount is zero. When loading it, it outputs
>> "[drm] radeon kernel modesetting enabled." in dmesg. However, when starting
>> the X server, it outputs "radeonfb 0000:00:10.0: Invalid ROM contents" there.
>
> Looks like radeonfb is preventing the radeon kernel module from working
> with kernel modesetting (KMS). Disable radeonfb or load radeon with
> modeset=0.
>
>
> P.S. To fellow upstream radeon developers: In this case it would
> probably be more useful to initialize the DRM without KMS?
>

Makes sense as that was the original behavior.

Alex