[LAU] Too many xruns

[Jeremy Jongepier]

On 09/05/12 06:17, Kevin Cosgrove wrote:
> Hello,
>
> I'm trying to record on a new system, and I'm getting xruns.  My
> old system produced no xruns.
>
> The problem system runs:
>
>    Fedora 17
>    Kernel 3.5.2-3.fc17.x86_64
>    Ardour 2.8.14
>    JACK 1.9.8
>    Intel i7, 16GB RAM, SATA 6Gb/s drives
>
> My user ID is a member of the "jackuser" group.
>
> Jack is running as:
>
> /usr/bin/jackd \
>    -T -ndefault -p 256 -R -P 60 -T -d alsa -n 2 -r 48000 -p 1024 -d hw:2,0
>
> In 43 minutes I've had almost 6700 xruns.
>
>
> The working system runs:
>
>    Mandriva 2010.2
>    Kernel 2.6.33.7-server-2mnb
>    Ardour 2.8.11
>    JACK 1.9.5
>    Intel Q9650, 4GB RAM, IDE drives
>
>
> Reading through the CCRMA documentation here:
>
> http://ccrma.stanford.edu/planetccrma/software/installplanetsixteen.html
>
> It looks like the kernel and jack for F17 are built for "proper
> realtime priority".  What am I missing.  Is there something
> I need to do beyond being a member of "jackuser" in order to
> operate with acceptable xruns?
>
> I think I'll go back to the old system for a while.
>
> Thanks....
>
> --
> Kevin


Hello Kevin,

Could you post the output of:
cat /proc/asound/cards
cat /proc/interrupts
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

More information on tweaking your setup: 
http://wiki.linuxmusicians.com/doku.php?id=system_configuration

Best,

Jeremy