[Earlier messages can be found at http://bugs.debian.org/536896 ] On Mon, 2010-04-12 at 01:08 +0800, James Andrewartha wrote: > On Thu, 25 Feb 2010, Moritz Muehlenhoff wrote: > > > On Tue, Jul 14, 2009 at 09:57:54PM +0800, James Andrewartha wrote: > > > Package: linux-image-2.6.26-2-amd64 > > > Version: 2.6.26-17 > > > Severity: normal > > > > > > All audio from gstreamer-using apps (eg Totem and Banshee) pops when I use a > > > 2.6.{25,26,28,30} amd64 kernel and i386 userspace. 2.6.24-etchnhalf.1-amd64 > > > does not have this problem, nor does 2.6.26-2-686. It doesn't occur when using > > > non-gstreamer apps like mplayer or mpd, nor with various gst-launch pipelines > > > suggested by #gstreamer like gst-launch playbin uri=file:///home/trs80/a.mp3 > > > > Hi, > > The next release of Debian (6.0, code name Squeeze) will be based > > on 2.6.32. Please test the current 2.6.32 from unstable/testing and tell > > us whether the problem persists. If so, we should report it upstream > > to the kernel.org developers. > > > > The 2.6.32 kernel is available from packages.debian.org and can > > be installed in both Debian stable, testing and unstable > > installations. > > I've bisected it, and the bad patch is 130755108ba03461f69da990e54e02a254accd23: Thanks for taking the time to do this. > Author: Takashi Iwai <tiwai@xxxxxxx> 2008-01-09 02:08:14 > Committer: Jaroslav Kysela <perex@xxxxxxxx> 2008-02-01 01:29:47 > Parent: d948035a928400ae127c873fbf771389bee18949 ([ALSA] Remove PCM xfer_align sw params) > > [ALSA] PCM - clean up snd_pcm_lib_read/write > > Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write > for cleaning up the code. > > Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> > Signed-off-by: Jaroslav Kysela <perex@xxxxxxxx> > > I don't know anything about this code, but I'm happy to deal with upstream > if you'd prefer me to. The above commit is supposed to be cleanup, but it has at least one semantic change: snd_pcm_mmap_control::avail_min no longer applies to non-blocking file handles. I don't know whether this is was an intentional or unintentional change, but it wasn't commented. I also don't know whether this can explain the popping, but I expect that it has changed the timing of audio I/O. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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