I encountered this issue also. But I see what is happening. There are two settings screens that allow modification of this behavior and I would say that is an inconsistency that could be fixed.
Screen Lock (Settings-> Privacy & Security) seems to control both blank screen delay AND also automatic screen lock. blank screen leaves on the display backlights. Lock screen turns off the display backlights. But Settings-> Power also tries to get involved and offers a Screen Blank setting. This Screen Blank setting does not turn off the display backlights. equipment: 12th gen N100 intel mini pc and I'm running 24.04 LTS. an older HP 1920x1084 monitor and an older Del 1920x1200 are connected by HDMI. What I found is that if I ask for Screen Blank in the settings, but not screen lock, both screens blank, but the backlight on the displays stays on. If I then go to Settings->Privacy & Security and ask that automatic screen lock kicks in then the backlights are turned off. ** Attachment added: "one screen shot" https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1971434/+attachment/5833495/+files/Screenshot%20from%202024-10-31%2010-58-02.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1971434 Title: Display powersave only blanks, but does not turn off To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1971434/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
