lsusb hangs
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Medium
|
Unassigned |
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(
open("/
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
I just confirmed that this external USB device functions properly in Windows 10.
So this is either a problem with my motherboard's USB (unlikely since the rest of my USB devices work) or some USB driver in Ubuntu