Just wanted to link to the following to comments I made for reference: - https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1998716/comments/19 - https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1971434/comments/42
I believe that for some people the KMS module may be the culprit. If I connect an external monitor, this bug appears, but on my laptop monitor everything works fine. If anyone could share how to dig deeper into this I'd be grateful. -- 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/1975557 Title: blank screen does not turn off display backlight Status in gnome-shell package in Ubuntu: Expired Bug description: I updated a system from 21.10 to 22.04 and noticed that when the screen is blanked by no keyboard or mouse activity that the backlight in the VGA monitor is still on. The "settings->Displays" has "Unknown Display" which I assume means the system does not know what commands to send to the monitor to shut it off. I booted a live DVD of 21.10 and the settings has the VGA display as 'AOC 22" ' which is correct and the screen blanking works correctly. So it seems that the definition for the AOC displays have been removed from 22.04. This behavior is different on Ubuntu 21.10, the VGA display is blank and the backlight is off. A minor nit is on 21.10 the "settings->Displays" shows the VGA display manufacture name, on 22.04 the VGA display manufacture name is "Unknown Display". I have discovered that the settings have the following options "settings->Power->Screen Blank" with a time value to be selected and the following text on the next line "Turns the screen off after a period of inactivity" "settings->Privacy->Screen->Blank Screen Display" with a time value to be selected and the following text on the next line "Period of inactivity after which the screen will go blank" The two options have different actions but seem to be connected because changing the time on one changes the time on the other. My guess is that the update changed the action for Ubuntu 22.04. I would like the 21.10 behavior, that is to turn off the VGA display not just blank the display when selecting the "settings->Power->Screen Blank" for 22.04. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1975557/+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
