The cause of this issue has to be in Xorg 1.20 then (18.04 comes with 1.19).
I assume that xserver-xorg-video-intel is still installed by default, so please check if removing this driver package has any effect (the generic modesetting driver will be used instead). For reference the greeter code: https://git.launchpad.net/lightdm-gtk-greeter/tree/src/lightdm-gtk-greeter.c#n2830 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1801609 Title: Fails to deactivate dpms off mode after user initiated wake-up events(not system-suspended, just locked and dpms active) Status in xorg-server package in Ubuntu: Confirmed Bug description: Xubuntu 18.10 with Xubuntu.desktop session running. System will lock and turn-off monitors(automatically or manually), but--will not wake- up monitors upon keyboard or mouse activity. I can type unlock password, blindly and then the monitors will wake and show unlocked session. WORKAROUND: I uninstalled light-locker, then, I installed gnome- screensaver. Xfce4(Xubuntu.desktop) will fallback on gnome-screensaver if light-locker is not found or installed. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: light-locker (not installed) ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12 Uname: Linux 4.18.0-10-generic x86_64 ApportVersion: 2.20.10-0ubuntu13 Architecture: amd64 CurrentDesktop: XFCE Date: Sun Nov 4 13:01:36 2018 InstallationDate: Installed on 2018-11-03 (0 days ago) InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2) SourcePackage: light-locker UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1801609/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
