Bug#839381: xserver-xorg-video-amdgpu: very long Xorg initilization time in recent kernels

[Michel Dänzer]

On 13/11/16 09:09 PM, Michael Strobel wrote:
> Hi,
> 
> i think i found the problem: it's powerplay. The bisection showed that
> 3466904d38ff1e63f0a19cb31166db67f2d05c61 is the commit which introduced
> the problem:
> 
> while the code before checked if amdgpu_powerplay > 0 now it checks
> equality. The default value is -1 so pp is enabled. I booted with
> amdgpu.powerplay=0 and the problem is gone for the testing kernel 4.7.
> 
> I tried a more recent kernel (4.9-rc5) and it seemed that it's not
> checked anymore if amdgpu.powerplay equals 0. I'm adding a patch which
> re enables the boot parameter.
> 
> Furthermore i'm not sure what causes the problem with my GPU in the
> first place. If there is anything i can do please let me know.

Adding the amd-gfx mailing list to Cc.

This bug report should be reassigned to the kernel package.


> On 10/03/2016 04:45 AM, Michel Dänzer wrote:
>> On 01/10/16 06:30 PM, Michael Strobel wrote:
>>> Package: xserver-xorg-video-amdgpu
>>> Version: 1.1.2-1
>>> Severity: normal
>>>
>>> Dear Maintainer,
>>>
>>> i'm running debian testing and for quite a while i have problems with my
>>> xserver on newer kernels. While linux-image-4.2.0-1-amd64 works fine linux-image-4.6.0-1-amd64 and linux-image-4.7.0-1-amd64 my xserver spends very long time (several minutes) on initialization. 
>>> The only problem i can spot is a lot of 
>>>
>>> Failed to send Previous Message.
>>> Failed to send Message.
>>>
>>> messages in dmesg. I'm not complete sure if the problem is even xserver
>>
>> Yeah, unless this doesn't happen with an older version of
>> xserver-xorg-video-amdgpu (and possibly related packages), it sounds
>> like an amdgpu kernel driver regression. Any chance you can bisect or at
>> least narrow down which kernel version introduced the problem?
>>
>>
> 


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer

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