I think most likely the cause here is an event from a mouse or keyboard -- even if you're not touching them. Please try:
1. Unplug all mice and keyboards. 2. Wait for the screen to turn off. 3. Does it turn back on? Similarly spurious wakeups could come from apps (please test with no apps running), or from the kernel. -- 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/1852101 Title: Monitors keep turning on when in power saving mode, every time. Status in gnome-shell package in Ubuntu: Incomplete Bug description: Whenever I lock my computer, or it goes into power saving mode automatically, the monitors turn back on and show the lock screen a few seconds later. This has persisted now for about a year, has persisted across multiple upgrades (18.10, 19.04, 19.10) as well as complete hardware replacement (CPU intel -> AMD, GPU nVidia -> AMD). So I'm convinced this is a software bug. The first line in logging that I can find that seems to trigger this is: "gnome-shell[1967]: ../../../gobject/gsignal.c:2647: instance '0x55daa50a2920' has no handler with id '145952'" I update my system regularly, so this looks to either be a regression, or uncaught bug. I don't know if other things are causing this, but that's the first line (based on time) that is reported when it turns the monitors back on. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: gnome-shell 3.34.1-1ubuntu1 ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1 Uname: Linux 5.3.0-19-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Nov 11 09:40:42 2019 DisplayManager: gdm3 InstallationDate: Installed on 2019-03-08 (247 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) RelatedPackageVersions: mutter-common 3.34.1-1ubuntu1 SourcePackage: gnome-shell UpgradeStatus: Upgraded to eoan on 2019-11-05 (5 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1852101/+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
