I have somewhat similar hardware and have problems with crackling audio on Ubuntu Lucid when using radeon KMS. If I disable KMS the crackling goes away completely. Try booting with "radeon.modeset=0" parameter and see if that helps.
-- Crackling sound with DVD playback on Lucid https://bugs.launchpad.net/bugs/578342 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
