Same problem here with Intel D54250WYK NUC box + Audiolab M-DAC which uses async USB connection for 24/96 audio.
It seems that the problem only occurs with Intel USB3 controllers. Unfortunately the internal USB2.0 headers in my NUC are controlled by the same USB3.0 controller, and there is no option in the BIOS to disable the XHCI (USB3) mode. I have indicated the problem towards Intel: https://communities.intel.com/message/255474#255474 Here is a discussion regarding the Linux xhci_hcd isochronous problem: http://www.spinics.net/lists/linux-usb/msg107264.html Last mail on 8 May 2014: "This does seem to point to an incompatibility between the driver and the Intel xHCI hardware. Figuring out what that incompability is may not be easy, though..." -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308628 Title: xhci-hda does not support isochronous streaming on usb 2.0 devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntustudio/+bug/1308628/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
