@Daniel .. Thanks. * I think brightness-controller is a thin UI around xrandr. If something in Ubuntu is improperly changing "Brightness" and xrandr is the only cure, why remove brightness-controller? Or, do your comments about it apply equally to xrandr -- namely that I should avoid xrandr, too? * I rebooted and chose "GNOME" (one of two identically-named options); I'll report back when (if) the screens go dim again. If things stay stable, I will report back later to help close (and blame MATE). I did not notice whether one login option said "on Xorg"; I'll look for that next time. * Thinking back, I wonder if a screensaver was implicated in the problem. * (Unrelated) I liked the GNOME UI on 20.10; MATE 21.10 has some annoying differences, so I am happy to learn how to go back to GNOME while staying with the same version Ubuntu.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1960569 Title: Screen goes dim To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1960569/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
