How do I set the default window manager under Fedora 21?

Asked 7/2, 2015 at 19:34 Answered 5/6, 2015 at 21:22

Fedora 21 comes with the ugly Gnome 3, and I installed XFCE and MATE, but I don't know, how to set either of them as a default X window manager. After I logout from Gnome 3, I don't see any selection from installed window managers.

Cuttler answered 7/2, 2015 at 19:34 Comment(2)

If you are using GDM, after a reboot/restart, when you select the user to login, there is not a choice (pull-down, etc.) of Desktop Environments? – Dost 9/2, 2015 at 13:36

no, unfortunately, not.. at least I didn't find it... Gnome 3 and GDM... really shame – Cuttler 9/2, 2015 at 19:57

As I interpret your question, you want to install switchdesk

$ yum install switchdesk switchdesk-gui

and run that. You can also try changing settings in /etc/sysconfig/desktop as described here.

If you want to simply try out a different desktop environment at login time, try installing lightdm or kdm (from the fine folks who bring us KDE) and pick one before you log in.

EDIT The advice above maybe outdated.

GDM does not seem to allow you to choose your desktop environment the way KDM and lightdm (and others probably) do. Using my favourite DM, lightdm, as an example (use sudo or switch to root):

$ sudo yum install lightdm
...
$ sudo systemctl reboot

It is possible to do this without rebooting

$ sudo systemctl stop gdm  # this will abruptly halt your session and take you to a text console

$ systemctl start lightdm

When I change DM, I like to reboot to make sure my changes persist. If (like mine did) your machine does not boot to a graphical screen, then log in as root and type:

$ systemctl start lightdm

Both KDM and lightdm allow you to select a DE from a pulldown menu.

If you want to revert back to Gnome's display manager:

$ sudo systemctl enable gdm
$ sudo systemctl disable lightdm

Polysyndeton answered 8/2, 2015 at 2:42 Comment(2)

I already tried switchdesk...I already installed mate and xfce, but it is not shown in switchdesk: either Gnome or System defaults... and etc/sysconfig/desktop doesn't exist in the filesystem :( – Cuttler 8/2, 2015 at 10:32

Thx, John, this worked out :) both lightdm and kdm :) just don't know which to use :) – Cuttler 9/2, 2015 at 19:51

GDM does support choosing at login time, but it is sort of hidden.

When I type my login, press Return and before I enter my password a small gear appears. It is a pull-down to choose the desktop environment.

Unfortunately, it is not sticky. I must do it every time. If I get my password wrong the first time, it resets to GDM.

Forefoot answered 5/6, 2015 at 21:22 Comment(0)

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