"some message back to the computer" is probably a hotplug (or unplug) event. That's why the first workaround works for you, because the monitor is no longer doing a logical disconnection when it goes to sleep.
If we could reproduce this reliably in development then it might be possible to just ignore events for a monitor reported as being unplugged while sleeping. Although you'd then have to deliver those events much later on wakeup so that in the case of a real unplug the desktop gets rearranged to match the new layout. We could also just blindly ignore all unplug events if they're suspiciously close to when the monitor was put to sleep. But again, the bug needs to be reproducible in development. Speculation like this is probably better discussed upstream (currently https://gitlab.gnome.org/GNOME/mutter/-/issues/1607) so that all GNOME developers can see it. -- You received this bug notification because you are a member of Desktop Packages, 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 Status in Mutter: New Status in gnome-settings-daemon package in Ubuntu: Triaged Status in mutter package in Ubuntu: Triaged Bug description: [ Impact ] On some machines when the screen blanks, the LCD backlight stays on. [ Workarounds (reported to work by some people) ] * Configure the monitor (in its own menus) to not auto-switch inputs. * Change from HDMI to DisplayPort cables. * Disable HDMI audio output. [ Test Plan ] 0. Make sure you're using an LCD (not OLED) so you can see if the backlight is on. 1. In Settings -> Power -> Screen Blank, set the inactivity period to 1 minute. 2. Verify after 1 minute that the screen is blank and the backlight is also visibly off. [ Where problems could occur ] [ Other Info ] To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1971434/+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
