[linux-audio-user] 2.6.8-rc1-mm1 [and alsa xrun debugging]

David M eseol at tiscali.co.uk
Fri Jul 16 11:54:28 EDT 2004

I think you have to echo 2 > /proc/asound/card0/etc 

On debian they are in /var/log/messages,var/log/syslog , and a few other 

On Friday 16 July 2004 15:25, Florian Schmidt wrote:
> after reading lee's email i had to try this kernel.. so i went over to
> www.de.kernel.org, grabbed 2.6.8-rc1 and patched it up with this patch:
> http://www.ussg.iu.edu/hypermail/linux/kernel/0407.1/1453.html
> On first sight it looks very good. many of the sporadic xruns i experienced
> with jack in RT mode are gone. even a "find /" parallel to a "make bzImage"
> seems not to provoke any xruns [i use ext3]. But: i use fluxbox and it
> supports desktop wheeling [switching desktop via scrollwheel - very handy]
> and doing this excessively and rapidly provokes xruns easily. Also starting
> mozilla just provoked an xrun..
> Well to provie more detailed info i thought i'd turn on xrun tracing. So
> here are the steps i took:
> 1] enabled debugging in the alsa drivers [i did that when i built the
> 2.6.8rc1mm1 kernel and the included alsa modules.
> 2] mango:/home/tapas# echo 1 > /proc/asound/card0/pcm0p/xrun_debug
>    mango:/home/tapas# echo 1 > /proc/asound/card0/pcm0c/xrun_debug
> 3] started jackd -R -d alsa -p 512 and provoked xruns, but the traces are
> nowhere to be found.. where should i look? /var/log/messages - nothin;
> /var/log/debug - nothing; /var/log/dmesg - nothing.. Maybe i'm just
> stooopid here.. Please enlighten me.
> Thanks,
> Flo

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