Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.15 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc4 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** 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/1739386 Title: [xhci_hcd] HC died · USB controller died, reboot necessary Status in linux package in Ubuntu: Incomplete Bug description: * 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! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1739386/+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
