[linux-audio-user] Trouble with 2.15.19/20 kernel

[Lee Revell]

On Fri, 2006-04-07 at 09:59 -0400, Bill Allen wrote:
> Hi,
> On my laptop, I'm running ubuntu dapper. Using the 2.15.18 kernel, all my audio applications work great OOTB. Very few xruns. With the latest two kernels (2.15.19 and 2.15.20), when I start jack using qjackctl, it immediately starts reporting xruns at the rate of about 10 per second - and this is with no applications running at all. I'm not sure about how to go about debugging this. 
> 
> Any ideas?

It's possible that they used to use realtime-lsm and recently switched
to the rlimit approach (although, shouldn't JACK bomb out if started
with -R and realtime scheduling is unavailable, rather than failing
silently?).

Try adding this to the end of /etc/security/limits.conf:

*               rtprio  hard    99
*               nice    hard    -20

Then reboot and try it again.

If it still fails please post the JACK output

Lee