Both jackd1 and jackd2 throw xruns constantly

[Richard Green]

I start jack via qjackctl taking all defaults. It throws xruns constantly, at about the rate of 10 per second. I tried disabling my wifi, which caused IRQ conflicts with firewire on my 8.04 system, but it didn't help. I tried installing jackd1, since my hardware is single-core, but that also exhibits the same problem.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: jackd 5
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
Date: Sun Apr 3 15:44:14 2011
Dependencies:

InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110402)
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: jackd-defaults
UpgradeStatus: No upgrade log present (probably fresh install)