Hi Christopher, I will not need a backport to a release prior to Saucy (I'm compiling and running the kernel 3.9.5).
I don't think the status should be changed to Invalid but to Fixed, as their is a specific fix in the kernel 3.9.5 for this issue. Here is a copy/paste from the 3.9.5 log: commit 3251317e8f0b705ca4999e4f272eb13ec5dcd6c4 Author: Alan Stern <st...@rowland.harvard.edu> Date: Wed May 8 11:18:05 2013 -0400 USB: xHCI: override bogus bulk wMaxPacketSize values commit e4f47e3675e6f1f40906b785b934ce963e9f2eb3 upstream. This patch shortens the logic in xhci_endpoint_init() by moving common calculations involving max_packet and max_burst outside the switch statement, rather than repeating the same code in multiple case-specific statements. It also replaces two usages of max_packet which were clearly intended to be max_burst all along. More importantly, it compensates for a common bug in high-speed bulk endpoint descriptors. In many devices there is a bulk endpoint having a wMaxPacketSize value smaller than 512, which is forbidden by the USB spec. Some xHCI controllers can't handle this and refuse to accept the endpoint. This patch changes the max_packet value to 512, which allows the controller to use the endpoint properly. In practice the bogus maxpacket size doesn't matter, because none of the transfers sent via these endpoints are longer than the maxpacket value anyway. Signed-off-by: Alan Stern <st...@rowland.harvard.edu> Reported-and-tested-by: "Aurélien Leblond" <blabl...@gmail.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006011 Title: 0763:2080 M-Audio Fast Track Ultra on XHCI isn't recognized To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1006011/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs