[alsa-devel] Invalid PCM pointer with CMI8738 and pcm.c buffer underuns
superquad.vortex2 at gmail.com
Sat Apr 5 08:21:27 CEST 2014
2014-04-05 0:15 GMT+08:00 andoru <andoru.blah at gmail.com>:
> Continued from here:
> After a few days now I finally got VLC to log everything that happens, and
> finally the bug reappeared, and unlike previously thought, it happens when
> watch a video as well.
> But unfortunately VLC didn't give anything specific that happened at the
> time, just some vague ALSA errors about broken pipes (at line 394) :
> At the time I added the video to VLC's queue I was doing something in the
> background (which I don't remember now unfortunately), but this has
> even when listening to something without doing anything in the background,
> and not having any background-running apps except Transmission.
> Also interestingly lately I've heard a few crackles/pops when listening to
> stuff, followed by a second or so of silence then back to normal when I
> would run CPU intensive stuff. At those points I thought the bug would be
> invoked again, but it didn't happen so.
> I still have the crackling problem, not able to change the PCM channel
> volume and screeching on audio that has clipped portions or very high
> frequency waves.
alsa debug: final HW setup:
PERIODS: (9 10)
BUFFER_TIME: (371519 371520)
does the hardware really support (16384/1764) 9.27 periods ?
does the error occur in the last period ?
> Can anyone give me any instructions on what I could do to further diagnose
> this problem?
> And more importantly, as I stated in the linked post above, how could I
> down the sound daemon/server/whatever so I could bring back the OS to
> stability without restarting.
Do the clippping occur with oss emulation which use power of 2 period size
More information about the Alsa-devel