Sam Shepperd, while booted into a Ubuntu kernel (not mainline/third party) please execute the following command only once, as it will automatically gather debugging information, in a terminal: apport-collect 1534856
When reporting bugs in the future please use apport by using 'ubuntu- bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs. ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1534856 Title: lsusb hangs Status in linux package in Ubuntu: Incomplete Bug description: When plugging an external sound card into USB3 ports on my ASUSTeK P9X79 motherboard, lsusb hangs and the usb device no longer works. If I plug the sound card into a USB2 port, lsusb does not hang but the device is not detected and there are 0 messages printed in dmesg. bash$ strace lsusb -v munmap(0x7fa344ff3000, 4096) = 0 open("/sys/bus/usb/devices/usb3/descriptors", O_RDONLY) = 6 read(6, It hangs on this read and Ctrl-C cannot kill it until I unplug the usb device. This device was working until maybe 1-2 months ago, I believe when signed UEFI kernels started getting pushed to LTS although that is just a guess on my part. I've tried falling back but I can't find a kernel that works anymore. bash$ uname -a 3.13.0-74-generic x86_64 bash$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1534856/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
