Compiz does not play well with jack

[prismatic7]

Description: Ubuntu 8.04
Release: 8.04
uname: 2.6.24-16-rt #1 SMP PREEMPT RT Thu Apr 10 15:15:40 UTC 2008 i686 GNU/Linux

Package versions:

jackd:
  Installed: 0.109.2-1ubuntu1
  Candidate: 0.109.2-1ubuntu1
  Version table:
 *** 0.109.2-1ubuntu1 0
        500 http://au.archive.ubuntu.com hardy/universe Packages
        100 /var/lib/dpkg/status

compiz:
  Installed: 1:0.7.4-0ubuntu6
  Candidate: 1:0.7.4-0ubuntu6
  Version table:
 *** 1:0.7.4-0ubuntu6 0
        500 http://au.archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status

With compiz enabled, jackd reports excessive XRUNs, even with the realtime kernel.

Disabling compiz in favour of metacity improves performance but not latency. Naturally, as compiz is a significant 'wow-factor' drawcard of Ubuntu (that actually has useful features, rather than just eye-candy), it's an irritating problem. After all, OS X manages a 3D-accelerated desktop AND a low-latency audio server!

Latency in general in Hardy seem to be higher than Gutsy - I was able to run my Behringer UCA202 at 11.6ms rather than the current 69.7ms (which still XRUNs like crazy, making it virtually impossible to demonstrate to clients in a live context)

Specs on the UCA202 are available here: http://www.behringer.com/UCA202/index.cfm?lang=ENG - it's been supported by ALSA for quite some time...

[Daniel T Chen (crimsun)]

To further diagnose your symptoms, you need to enumerate precisely the configuration(s) between gutsy and hardy. Can you reproduce the symptoms in default Ubuntu Studio installations of gutsy, hardy, and intrepid?

[Pedro Villavicencio (pedro)]

Closing this bug report as no further information has been provided. Please feel free to reopen this bug if you can provide the information asked for. Thanks!.

[Andrew Hunter (rexbron)]

Closing for same reason as above.