I believe that I have the same problem, however it is my mouse that (I think) causes it. At least my mouse loses power (not mouses fault as tested by plugging into other computers/usb power outlets). Anything I can do to help?
-- 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
