[alsa-devel] snd_pcm_delay issue - How to debug?
s.jansen at gmail.com
Wed Sep 18 17:33:41 CEST 2013
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?
> On Tue, Jul 16, 2013 at 9:28 AM, Sander Jansen <s.jansen at gmail.com> wrote:
>> 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
>> How can i best debug this issue and find out the cause.
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