Here's another wrinkle to this bug. I don't have the BIOS option and I can't get a kernel to build for me. A friend suggested manually unbinding the xhci driver for the usb audio interface like this https://lwn.net/Articles/143397/
If I run "lspci -v | grep -i xhci" then I get 00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05) This is not the usb audio interface (because it's not a pci device) and in fact, if I fake a root account using sudo -i and then run echo -n "0000:00:14.0" > /sys/bus/pci/drivers/xhci_hcd/unbind it unbinds my keyboard and mouse, and then I have to do a hard reset. On the other lsusb gives me the following correct device: Bus 003 Device 006: ID 194f:0103 PreSonus Audio Electronics, Inc. AudioBox 1818 VSL Now, the (virtual) directory /sys/bus/pci/drivers/ contains the subdirectory xhci_hcd, but it does not contain a subdirectory ehci_hcd. There is a subdirectory ehci-pci, but that subdirectory doesn't contain any devices. So I went to the directory /sys/module/ehci_hcd/ which *does* exist and there is no devices subdirectory and no bind or unbind. ls -l just shows drwxr-xr-x 2 root root 0 Apr 25 00:02 parameters --w------- 1 root root 4096 Apr 25 00:02 uevent So I guess what I'm saying is that it doesn't even look like I have access to ehci-hcd even though it's built into the kernel. I don't really understand how xhci-hcd is related to pci devices, but is there not a way I could manually tell the kernel to use only usb2.0 drivers? -- 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
