I just upgraded from FC6 to FC7 and, now, the GLmatrix screensaver won't work but all the other screensavers work fine. Clicking on the Setup or Test buttons does nothing - not even an hourglass - and, when it comes on, the screen just goes black.
I've tried manually installing it: no luck. I'm running KDE at 1280 x 1024 with an nVidia card: yes...closed drivers.
So...any ideas? Thanks.

Not sure how the packages are named in Fedora but those GL screensavers come with the xscreensaver package.

On Debian if things go badly with them I reinstall them with aptitude. You would use yum or add/remove (pirut) to do the same.

I need to reinstall 2 things when this happens, xscreensaver and xscreensaver-gl.

Then you can open either the use the KDE KControl to set it up again (they should work after reinstalling them) or turn those controls off and use the xscreensaver control panel itself, which is what they recommend.

While in KDE I had no problem controlling them with the KDE controls, plus that way I'd get the KDE screensavers too.

I just went through something like this on Debian. I had installed on my own the Gnome Screensaver package, which supersedes xscreensavers but does not contain the screensavers from there. Since those are also nice I didn't mind, but the new Compiz Fusion was making them herky-jerky and the xscreensavers did not suffer from that.

I had to purge gnome screensavers and reinstall both the xscreensaver packages to get that to take control of things again.

KDE controlling this is nicer since it includes access to the xscreensavers as well, and regardless of the xscreensaver documentation I had no problems using the KDE Screensaver controls to use them.

On Gnome, if I want them I lose the ones included in the Gnome Screensaver package. I found that they do not coexist well. Using the Gnome Screensaver broke the ability of the xscreensaver to work.

Battling programs, sheesh!

That's got it. Removed ALL screensavers, reinstalled all EXCEPT the Gnome and now we're in business. Thanks mate.
This one's CLOSED.