[alsa-devel] [PING!] Re: HDMI audio is not working on my new desktop

[Alexander E. Patrakov]

2013/8/22 Alexander E. Patrakov <patrakov at gmail.com>:
> 2013/8/22 Wang Xingchao <wangxingchao2011 at gmail.com>:
>> cc Mengdong and Liam, we're in the same PRC audio Team.
>>
>> 2013/8/21 Alexander E. Patrakov <patrakov at gmail.com>:
>>> 2013/8/21 Wang Xingchao <wangxingchao2011 at gmail.com>:
>>>> Hi Takashi/Alexander E. Patrakov,
>>>>
>>>> 2013/8/20 Takashi Iwai <tiwai at suse.de>:
>>>>> Xingchao, could you take a look at this bug?
>>>>
>>>> sure, i will take a look at it.
>>>> But i'm afraid i cannot continue tracking from next week, i'm under
>>>> leaving process at Intel.
>>>
>>> Best wishes to you, and good luck with a new job :)
>>>
>>> But then please tell us the contact information of the person at Intel
>>> who should be contacted instead of you for any further questions
>>> related to HDMI audio on Haswell.
>>>
>>>> At first glance, i saw a lot of errors:
>>>>
>>>> [  772.822663] playback write error (DMA or IRQ trouble?)
>>>> [  782.912776] playback write error (DMA or IRQ trouble?)
>>>> [  793.002904] playback write error (DMA or IRQ trouble?)
>>>> [  803.093052] playback write error (DMA or IRQ trouble?)
>>>> [  813.183205] playback write error (DMA or IRQ trouble?)
>>>> [  823.273217] playback write error (DMA or IRQ trouble?)
>>>>
>>>> I know this issue on some Haswell ULT boards(STP/WTM1) because they
>>>> are not stable, and it's better to use latest BIOS image(V131 or
>>>> later).
>>
>> btw, did you do any suspend/resume operation before the audio playback test?
>> if not, it's a new case. i found the issue only on some particular
>> boards after suspend/resume.
>
> The issue is 100% reproducible without suspend/resume. Just in case, I
> tested after one suspend-resume cycle, it didn't fix the problem.

On IRC (#intel-gfx) ohsix said that the bug
(https://bugzilla.kernel.org/show_bug.cgi?id=60769) may be graphics
related after all, but was too scared with the interrupt handling code
there. The contents of /proc/interrupts are attached to the bug, but
he said there is nothing interesting there.

BTW I am surprised that the bug is still assigned to Jaroslav Kysela
and not to Intel specialists (who are not even in the CC list of the
bug).

-- 
Alexander E. Patrakov