At Thu, 23 Jul 2009 16:33:08 +0800, Wu Fengguang wrote: > > On Thu, Jul 23, 2009 at 04:15:59PM +0800, Takashi Iwai wrote: > > At Thu, 23 Jul 2009 15:56:20 +0800, > > Wu Fengguang wrote: > > > > > > On Thu, Jul 23, 2009 at 03:30:54PM +0800, Takashi Iwai wrote: > > > > At Thu, 23 Jul 2009 15:22:53 +0800, > > > > Wu Fengguang wrote: > > > > > > > > > > On Thu, Jul 23, 2009 at 03:01:21PM +0800, Takashi Iwai wrote: > > > > > > At Thu, 23 Jul 2009 14:53:45 +0800, > > > > > > Wu Fengguang wrote: > > > > > > > > > > > > > > Hi Takashi, > > > > > > > > > > > > > > When doing multi-channel playback tests on IbexPeak, I found that the > > > > > > > following patch makes the playback enter an infinite loop, repeatedly > > > > > > > playing a range of ~0.5s audio content. (Seems that some buffer > > > > > > > pointer can never advance.) > > > > > > > > > > > > Could you set 1 to /proc/asound/card0/pcm0p/xrun_debug and give the > > > > > > messages? Also, please show /proc/.../pcm0p/sub0/hw_params, too. > > > > > > > > > > > > The change affects only the code path for the problematic hardware > > > > > > that reports wrong DMA position. So, if this change regresses, it > > > > > > means that the device has been already problematic from the > > > > > > beginning... > > > > > > > > > > I caught some messages: > > > > > > > > Is this with the patched (as is on sound git tree) kernel? > > > > > > Yes, it's unmodified latest git tree. > > > > > > > What if changing from #if 1 to #if 0? > > > > > > This makes 8-channel playback work again. > > > > OK, then could you apply the patch below, and do > > "echo 9 > /proc/../xrun_debug", then gather the messages with both > > #if 1 and #if 0? This will record the each snd_pcm_period_elpased() > > so beware that you may get flood of messages. > > OK, but for now this box is doing something else that cannot interrupted. > So I'll try the patch some time later. Sorry. Sure, no problem. Meanwhile, I'm thinking applying the debug-print patch now. Any objection? Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
