This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1886827 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Tags added: bionic -- 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/1886827 Title: Machine hangs when doing a normal reboot Status in linux package in Ubuntu: Incomplete Bug description: Hi, When booting into kernel 4.15.0-99-generic or higher and also kernel 5.3.0-53-generic or higher, the system hangs when issuing the reboot command or CTRL-ALT-DEL from console with the following console messages: ---------- snip ------------ Reached target Final Step. Starting Reboot... < following message repeats indefinetely every 120 seconds > INFO: task systemd-shutdow:1 blocked for more than 120 seconds. Not tainted 4.15.0-99-generic #100 " echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ---------- snip ------------ I did a git bisect procedure between kernels 4.15.0-96-generic and 4.15.0-99 and it reported the following: ---------- snip ------------ b52be79f3c6cc89bb3834c5174843e34f945f386 is the first bad commit commit b52be79f3c6cc89bb3834c5174843e34f945f386 ---------- snip ------------ Ubuntu version affected: Ubuntu 4.15.0-99.100-generic 4.15.18 First kernel package affected: linux-image-4.15.0-99-generic Necessary debug files will be attached as soon as possible. Quinn To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886827/+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