[alsa-devel] snd_pcm_delay issue - How to debug?

[Sander Jansen]

Never mind. Issue not related to alsa.


On Tue, Jul 16, 2013 at 6:27 PM, Sander Jansen <s.jansen at gmail.com> wrote:

> Here the two alsa-info dumps for the hardware I'm having the problem with.
> Also a log of my music player. It reports:
>
> The 'position' the  number of frames it has written to the device (also
> reported in seconds) and the delay at that time (after writing).
> Also the 'timestamp' which is the reported playback progress in seconds
>  reported to the UI. When the second track is played (line 590), the
> problems start to become noticeable eg. playback progress is a couple of
> seconds out of sync.
>
> Any ideas?
>
> Thanks,
>
> Sander
>
>
>
> On Tue, Jul 16, 2013 at 9:28 AM, Sander Jansen <s.jansen at gmail.com> wrote:
>
>> Hi,
>>
>> I'm seeing an issue where snd_pcm_delay is returning bogus values
>> (usually a lot larger than in actuality)  in that it ultimately affects the
>> progress timer in my audio player. Both are HDA based audio cards, though
>> one connects to the HDMI output and while the other connects to analog out.
>>
>> I'm suspecting I'm seeing a driver bug since I only start noticing the
>> issue since a few kernel releases ago (though not sure which one started
>> it).
>>
>> How can i best debug this issue and find out the cause.
>>
>> Thanks,
>>
>> Sander
>>
>
>