Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. ×
Red Hat Software

Journal stoolpigeon's Journal: GDM/KDM Weirdness 2

Something has been bugging me for a bit. I have 2 Fedora 16 machines - 1 is a 64 bit desktop and the other a 32 bit laptop. I have done too much different between the 2 but I like the login box on the one better than the other. I wasn't sure how they came to be different - but they are. So I tried to get them to match. This led to the realization that the changes I made in the System Setting -> Login Screen menu had no effect. I googled around but couldn't find anything that helped. A lot of what I found was outdated.
It seemed to me that the most obvious reason that the changes didn't show up was that I was using GDM and the interface in System Settings is to change KDM. So I set out to get that switched. ( That it would be using GDM is no surprise as I just do a regular Fedora install, include KDE and switch to that as the default. ) That took a while because the KDE documentation doesn't work. I installed the program system-switch-displaymanager-gnome and I ran it. I chose KDM. Doing so created a file /etc/sysconfig/desktop that contained one line - DISPLAYMANAGER=KDE. This did not change the behavior. I just kept on digging - finally I ran across a fedorforum.org thread that mentioned changing the fallback order in /etc/X11/prefdm I took a look at that file on my system. To me it looked like what was in /etc/sysconfig/desktop should do what I wanted, but just for fun I switched the fallback order to have KDM first. When I did - my system started using KDM and now the changes in System Settings take effect.
I'm guessing if I installed from the KDE spin of Fedora, this might not be a problem. But I'm still at a loss as to why my desktop file had no effect. The first part of prefdm looks like this:

# Run preferred X display manager
if [ -f /etc/sysconfig/desktop ]; then
                . /etc/sysconfig/desktop
                if [ "$DISPLAYMANAGER" = GNOME ]; then
                elif [ "$DISPLAYMANAGER" = KDE ]; then
                elif [ "$DISPLAYMANAGER" = WDM ]; then
                                splash_quit_command="plymouth quit"
                elif [ "$DISPLAYMANAGER" = XDM ]; then
                                splash_quit_command="plymouth quit"
                elif [ -n "$DISPLAYMANAGER" ]; then
                                splash_quit_command="plymouth quit"

It seems to me that ought to work - but for whatever reason it does not. Now I have it working the way I'd like by setting KDM as the first fallback and that makes me happy. I think I'll file a bug report - though I hope it is a bug and not something I am missing.

This discussion has been archived. No new comments can be posted.

GDM/KDM Weirdness

Comments Filter:
  • by Chacham ( 981 ) *

    Make sure you look at both system and user settings. Sometimes the other one is being used.

    • Good point - and I did consider it - though I just don't know enough about how it all works to follow that path. Basically I would just search on stuff like "KDM changes not saving" or "switching from gdm to kdm" and so on, with various extra info. thrown in.

      So I was looking all over the place for anything that would put me on the right track. My one guess in this regard though - was that in a way this seems like it would have to be a system wide choice as it comes into effect before any user is logged in -

Life in the state of nature is solitary, poor, nasty, brutish, and short. - Thomas Hobbes, Leviathan