Public bug reported:
* Ubuntu release: 17.04
* uname -r: 4.10.0-42-generic
* Expected behaviour: the USB ports run well
* What happens: the USB ports are randomly killed from time to time
* Explanation:
The xhci_hcd driver reports that the xHCI host is not responding to a stop
endpoint command. The USB host controller is then shut down and all USB ports
are left dead until a reboot is performed. This is not immediate nor
predictable --- sometimes, it can be days before it happens; sometimes it is
just hours.
If I understood correctly, there is no way to reload the kernel module
of the USB driver, because it is baked into the kernel at compile time.
Something like that? :)
When rebooting, the shutdown process completes (it reports a "shutdown
target achieved" or similar), but is unable to unmount the /home/user
partition. Therefore, the system does not shutdown unless I press the
power button (hard shutdown). I do not know if there is a way to get a
TTY at that point to manually unmount the partition. The home folder is
encrypted... I do not know if this has something to do with it, but this
error only occurs when the USB HC is killed.
I suspect the USB problem has to do with an external USB hub by TP-LINK.
It seems to only fail when this device is connected. The hub model is
UH400, by TP-LINK.
Anything I can add, just ask for it!
Thanks a lot!
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: zesty
** Attachment added: "dmesg output"
https://bugs.launchpad.net/bugs/1739386/+attachment/5025025/+files/dmesg.log
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https://bugs.launchpad.net/bugs/1739386
Title:
USB controller died, reboot necessary
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