The error shows up clearly in the usbmon trace. It resulted from the fact that no events occurred during an 8-ms time period; normally an audio-in transfer would finish up every ms.
Why were there no events during that time? I can't tell; the two most likely explanations are a hardware bug in your OHCI USB controller, or some other driver leaving interrupts disabled for far too long. The attached patch may help. It will attempt to print some information to the system log when one of these gaps occurs. This ought to pin down where the source of the problem lies. ** Attachment added: "Diagnostic patch for OHCI interrupt gaps" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1191603/+attachment/3722124/+files/ohci-irq-info -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1191603 Title: raring-updates: regression: 3.8.0-24.35 causes sporadic failure of USB audio devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1191603/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
