I'll test this out tonight, thanks! On Thu, Aug 1, 2013 at 2:58 PM, Alan Stern <[email protected]> wrote: > If it's xHCI then there's nothing I can do. If it's EHCI then the > attached patch ought to help. For debugging purpose it writes a warning > message to the kernel log whenever an underrun occurs, but it prevents > the underrun from causing a failure. > > It turns out there are two bugs in the snd-usb-audio driver, either of > which may be affecting you. There's a patch for one of the bugs at > <http://marc.info/?l=linux-usb&m=137288343602140&w=2>, but there's no > fix for the other bug (not enough URBs submitted). > > ** Attachment added: "Accept URB submissions during underruns, with a warning" > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1191603/+attachment/3757297/+files/ehci-iso-accept > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1191603 > > Title: > raring-updates: regression: 3.8.0-24.35 causes sporadic failure of USB > audio devices > > Status in “linux” package in Ubuntu: > Triaged > > Bug description: > The 3.8.0-24.35 kernel update in raring introduced sporadic failure of > USB audio devices. The symptoms are that the device suddenly stops > working and you get the following dmesg output: > > [ 7532.838274] cannot submit urb (err = -18) > [ 7532.838283] cannot submit urb (err = -18) > [ 7532.838291] cannot submit urb (err = -18) > [ 7532.842224] delay: estimated 288, actual 96 > [ 7532.922160] delay: estimated 432, actual 96 > > This bug has been introduced by the following commits (UHCI: implement new > semantics for URB_ISO_ASAP, OHCI: implement new semantics for URB_ISO_ASAP): > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c44b225077bb1fb25ed5cd5c4f226897b91bedd4 > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6a41b4d3fe8cd4cc95181516fc6fba7b1747a27c > > A fix has been released (USB: fix latency in uhci-hcd and ohci-hcd): > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e1944017839d7dfbf7329fac4bdec8b4050edf5e > > The fix hasn't been backported to 3.8 yet, but as this bug was > introduced to raring by pulling upstream kernel changes, it would be > nice to backport the fix to raring as soon as possible. > > For further reference: > > http://markmail.org/message/gt554vejrjkutsfw#query:+page:1+mid:gt554vejrjkutsfw+state:results > https://bbs.archlinux.org/viewtopic.php?id=163891 > http://comments.gmane.org/gmane.linux.usb.general/85343 > http://lists.opensuse.org/opensuse-bugs/2013-05/msg01617.html > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1191603/+subscriptions
-- All programmers are playwrights, and all computers are lousy actors. #define sizeof(x) rand() :wq -- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
