Another idea: You seem to be using the default Xorg session so that increases the possible set of components that could tamper with the power state. Please try logging into 'Ubuntu on Wayland' to see if the problem happens there.
And another idea: Check that you don't have 'tlp' installed. It causes random power management bugs. Assuming the issue is not tlp, please also report it upstream at: https://gitlab.gnome.org/GNOME/mutter/issues If you are feeling adventurous then it might help to figure out the exact time of day the display is waking. Like with a timelapse video next to a clock that's synchronized to the machine's clock. That could then be compared to the system log or might spark other ideas. -- 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/1882462 Title: Displays wake up pre-maturely (likely driven by notification) Status in gnome-shell package in Ubuntu: Confirmed Bug description: After a period of time, my displays go to sleep as they should. However, I often come back to find that the displays are awake, the mouse pointer is on a screen, but the screens are otherwise black. They're in this weird "awake but not fully on" mode. At that point, they will not go back to sleep as they should unless I fully awake them and let them go back to sleep. I don't know exactly what triggers the "half awake" but I suspect it's a notification. The displays shouldn't turn on without a user action. It wastes power and is clearly broken. I've attached a photo for an example. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-shell 3.36.2-1ubuntu1~20.04.1 ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34 Uname: Linux 5.4.0-33-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu27.2 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun Jun 7 16:10:20 2020 DisplayManager: gdm3 InstallationDate: Installed on 2018-07-24 (684 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180724) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash RelatedPackageVersions: mutter-common 3.36.2-1ubuntu1~20.04.1 SourcePackage: gnome-shell UpgradeStatus: Upgraded to focal on 2020-01-07 (152 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1882462/+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
