Re: Radeon KMS doesn't work.

["Justin P. Mattock" <justinmattock@gmail.com>]

On 07/05/2010 10:27 AM, Marvin wrote:
>
> Hi Wakko,
>
> as nobody seems to have answered yet, I think it's better that you file a bug
> against the radeon driver (bugs.freedesktop.org, one bug for each defect).
> There may be similar bugs already, so please check this also.
>
> Thanks
>
> Marvin
>
> Am Montag 05 Juli 2010, 01:19:26 schrieb Wakko Warner:
>> Wakko Warner wrote:
>>> I have a Dell Inspiron 5100 with an ATI Radeon Mobility M7 (7500 R100
>>> PCI ID 1002:4c57 sub 1028:0149).
>>>
>>> Immediately when radeon.ko is loaded, the screen goes blank (The
>>> backlight stays on).  I have fbcon compiled into the kernel (I also
>>> tried as module). I am unable to get the screen to work again until I
>>> reboot.  The logs did not appear to have any errors after the module
>>> loaded.  The system was still responsive on the network.
>>>
>>> I tried kernels 2.6.33 and 2.6.34.
>>>
>>> I can provide kernel output if needed.
>>
>> I need to add that if I use modeset=0, the screen does not blank.
>>
>> Also 2.6.34 (with modeset=0) doesn't do 3D very well on this system.  Some
>> objects look ok, some are garbled, some do not appear at all.  The gears
>> from xscreensaver does not show up at all.
>
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I've hit a couple of things with radeon as well.. the first was this:
http://lkml.org/lkml/2010/6/6/172
(if your hitting this issue, then the patch should work and/or it should 
already be in the main tree).

then a few days ago hit another:
https://bugzilla.kernel.org/show_bug.cgi?id=16335
(keep in mind still uncertain on a fix for this, reverting the commit 
gets me up and running(I created a patch, but an umsure if it's a right 
solution)).

if none of these are what your hitting, then maybe(if you can) do a 
bisect on this!

Justin P. Mattock