Given the CPU started to overheat you might want to log in remotely via SSH from another machine and leave 'top' running. Then next time the problem occurs tell us what is using all the CPU according to 'top'.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1813248 Title: Hang at screen unlock (gdm / 18.04) Status in gnome-shell package in Ubuntu: Incomplete Bug description: For two days in a row (one would have been a one-off WTF that I don't care to report) my system now hang after unlocking from the UI. I can't see any obvious hanging processes that would be the obvious reason. OVer day I have a few screen locks e.g. when going for lunch, but at least 2/2 times it only appeared when the lock was active over night. I'm not sure it if it the duration or that some job kicks in at night. I have used apport to collect the basics, and will add some more debug data. If you find a lead in there let me know, otherwise assuming I might face this every morning please let me know what to check next time it happens so that we can find the root cause. I found similar bug 1285258 - but other than there I can NOT hit cancel to get a second chance, nothing in the UI moves at all and all I can do is drop to a non UI console with CTRL+ALT+F3 and debug from there. I found that restarting gdm (systemctl restart gdm) gets me logged in, therefore I'll also attach a journal log so that you can look for issues in there. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gdm3 3.28.3-0ubuntu18.04.3 ProcVersionSignature: Ubuntu 4.18.0-13.14~18.04.1-generic 4.18.17 Uname: Linux 4.18.0-13-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 Date: Fri Jan 25 06:59:10 2019 InstallationDate: Installed on 2018-10-12 (104 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: gdm3 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1813248/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
