Arch GDM wiki suggests that if you
need to change some config for
gdm, that must be done on
gdm user. As a
first option, it’s suggested that you run the command below to get shell access
# machinectl shell [email protected]
That’s unfortunally is not working:
Connected to the local host. Press ^] three times within 1s to exit session. /sbin/nologin: invalid option -- 'l' Try 'nologin --help' for more information. Connection to the local host terminated.terminated
A bug has been filed on
upstream already, so that should be a matter of time to get it fixed on next
An alternative for that is running
su enforcing a different shell:
# su gdm -s /bin/sh -c 'gsettings set org.gnome.desktop.interface scaling-factor 2'
However, it fails me:
(process:10904): dconf-WARNING **: 04:08:52.321: failed to commit changes to dconf: Cannot autolaunch D-Bus without X11 $DISPLAY
su gdm -s /bin/sh -c 'dbus-launch gsettings set org.gnome.desktop.interface scaling-factor 2'
This should do the trick.