Tried the patch from http://marc.info/?l=linux-usb&m=131973404328622 seems to work well so far, external sound card works in full duplex, no adverse effect. Am experimenting more.
** Patch added: "Thomas Poussevin's patch" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/889953/+attachment/2599171/+files/ehci_bugfix.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/889953 Title: bandwidth allocation problems with external USB audio device To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/889953/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs