** Attachment added: "stack-trace.jpg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803929/+attachment/5214086/+files/stack-trace.jpg
-- 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/1803929 Title: Summary: Kernel bug (unhandled paging request) on "udisksctl power- off" Status in linux package in Ubuntu: Incomplete Bug description: lsb_release -rd Description: Ubuntu 16.04.5 LTS Release: 16.04 uname -a Linux metabox 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 10:58:50 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux Steps (1) to reproduce: 1) Plug in a USB3 hard drive. 2) Right click on launcher icon. 3) Select "Safely Remove". After finding this: https://askubuntu.com/a/532691 ...the following steps also reproduce the problem. Steps (2) to reproduce: 1) Plugin in a USB3 hard drive. 2) udisksctl unmount -b /dev/sdXY 3) udisksctl power-off -b /dev/sdX System completely locks and becomes unresponsive, such that even the Magic SysRq key combination does nothing. Most of the time the fans on my laptop go crazy (so the CPU must get stuck in some loop), but once they did not and the system was just locked (without the fans going nuts). I can't get a textual copy of the kernel bug log (because I have to do a hard reset to regain control of the system and the output doesn't get flushed to disk), but I did manage to get a photo of some of it (please refer to attachment). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803929/+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
