Radeon KMS doesn't work.

[Justin P. Mattock]

On 07/05/2010 07:34 PM, Xiaotian Feng wrote:
> On Tue, Jul 6, 2010 at 2:18 AM, Justin P. Mattock
> <justinmattock at gmail.com>  wrote:
>> 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)).
>
> I think this is the same cases with (http://lkml.org/lkml/2010/7/5/44)
> And the fix for this bug is in -tip tree, commit 2463eb8
>
> Could you please try following patch?
> http://git.kernel.org/tip/2463eb8b3093995e09a0d41b3d78ee0cf5fb4249
>

applied.. o.k. system started without hitting the crash I was 
experiencing!! Thanks for this.. I'll run this and let you know if I 
experience anything out of the ordinary..

>>
>> if none of these are what your hitting, then maybe(if you can) do a bisect
>> on this!
>>
>> Justin P. Mattock
>> --
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>>
>

Tested-By: Justin P. Mattock <justinmattock at gmail.com>

I'll send this info over to the bug report so they know..and if things 
go good get this thing closed..

Justin P. Mattock