I can add that the same behavior happens under xorg, gnome shell ubuntu 17.10 latest update. editing monitors.xml also is ignored it seems. the bug affects GDM mmonitors.xml as well.
** Summary changed: - Method ApplyConfiguration is not implemented on interface org.gnome.Mutter.DisplayConfig + Can't change display configuration, Method ApplyConfiguration is not implemented on interface org.gnome.Mutter.DisplayConfig -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1714410 Title: Can't change display configuration, Method ApplyConfiguration is not implemented on interface org.gnome.Mutter.DisplayConfig Status in gnome-control-center package in Ubuntu: Confirmed Bug description: Since last night's updates, I can no longer change screen resolution or monitor alignment in gnome-control-center anymore (in gnome-shell running under Wayland). gnome-control-center fails silently in the GUI but reports this from the command line: (gnome-control-center:5887): display-cc-panel-WARNING **: Error applying configuration: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Method ApplyConfiguration is not implemented on interface org.gnome.Mutter.DisplayConfig All the available display modes are listed in gnome-control-center (you just can't select them). On the initial login, xrandr only showed two screen resolutions, one for screen XWAYLAND0 of 3840x2160 and another for XWAYLAND1 of 1920x1080, but after unplugging the external monitor and re-plugging it, now xrandr shows eDP-1 with all available modes and HDMI-1 with all available modes (you just can't select them from g-c-c). ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-control-center 1:3.24.3-0ubuntu6 Uname: Linux 4.13.0-041300rc7-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Sep 1 11:47:50 2017 InstallationDate: Installed on 2017-08-16 (15 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) JournalErrors: Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system. Users in the 'systemd-journal' group can see all messages. Pass -q to turn off this notice. No journal files were opened due to insufficient permissions. SourcePackage: gnome-control-center UpgradeStatus: Upgraded to artful on 2017-08-17 (15 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1714410/+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
