diagnostic tools to trace the reason xruns are happening?

Ralf Mardorf ralf.mardorf at alice-dsl.net
Wed Jun 22 21:12:03 UTC 2011


On Wed, 2011-06-22 at 15:27 -0500, Kenneth Koym wrote:
> Ralf: does this work if I have the ppa in kstudio 10.04.02 amd64,
> which ran updates today? Am definitely not in 11.04; I have some xruns
> but not bad. It appears the magic fedora people tell about may not be
> applicable to my OS as I don't get to start. Ken

What's the output of ls /dev/snd/timer -l?

If it should be 'root audio', than AFAIK everything regarding to the
regular settings is ok.

Usage of hpet is tricky and not a regular thingy.

Btw. are the xruns audible glitches?
> 
> 
> On Wed, Jun 22, 2011 at 2:10 PM, Ralf Mardorf
> <ralf.mardorf at alice-dsl.net> wrote:
>         On Wed, 2011-06-22 at 19:56 +0200, Ralf Mardorf wrote:
>         > On Wed, 2011-06-22 at 19:24 +0200, bart deruyter wrote:
>         > > there is no access for the audio group to the high
>         precision event
>         > > timer, nor for the real-time clock.
>         >
>         > The regular timer should be automatically set to group audio
>         during
>         > startup, run
>         >
>         > $ ls /dev/snd/timer -l
>         
>         
>         PS:
>         
>         If the permissions aren't set correctly, edit something
>         regarding to the
>         timer, as I had to do for seq for Debian
>         testing /etc/udev/rules.d/50-udev-default.rules
>         
>                # sound
>                KERNEL=="seq", GROUP="audio", MODE="0660", \
>                OPTIONS+="static_node=snd/seq"
>         
>         name it 01-blabla.rules ;). The Debian systems seems to be
>         anti-multimedia :D.
>         
>         
>         >
>         > to check this.
>         >
>         > Hpet needs to be set by you for startup. Or in a terminal
>         emulation run
>         >
>         > $ sudo chgrp audio /dev/hpet
>         > $ sudo chmod g+rw /dev/hpet
>         > $ sudo modprobe snd-hrtimer
>         >
>         > to set it after startup.
>         
>         
>         
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