Public bug reported: I upgraded an old HP laptop with Intel 965GM (X3100) graphics from a previous non-Wayland Ubuntu version to 24.10 which is using GNOME/Wayland. The display is correctly blanked and locked according to the timeout set in gnome-power-manager but is not turned off completely - the backlight is left on, both wasting power and accumulating hours which degrades the backlight.
XWayland does not offer a DPMS extension so there's no way to use traditional settings and tools to turn off power to the display, or any apparent alternative to gnome-power-manager for this purpose. gnome-power-manager version is 3.32.0-2build2 according to dpkg. ** Affects: gnome-power-manager (Ubuntu) Importance: Undecided Status: New ** Summary changed: - Laptop LCD backlight left on when screen turns off in 24.10 + LCD-equipped laptop backlight left on when screen locked/blanked in 24.10 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/2093278 Title: LCD-equipped laptop backlight left on when screen locked/blanked in 24.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/2093278/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs