Screensaver in F11 loses horizontal sync

[Bob McConnell]

I searched both Google and the archives of this list, but could not find 
the magic keys to produce useful answers.

I downloaded the Fedora 11(*) live CD and used it to install on two 
boxen. Both are showing the same problem. Everything works well until 
the screen saver kicks in. At that point the display loses sync and 
shows torn jagged diagonal lines across the screen. Any normal input 
triggers a recovery and returns to my regularly scheduled programs.

Fedora 11, KDE

Box 1:
   Dell GX270 SFF
   P-4/Xeon 2.6 GHz
   512 MB DDR RAM
   20 GB IDE drive
   Intel 865 Video Chip

Box 2:
   White box
   P-4/Celeron 1.0 GHz
   512 MB DDR RAM
   60 GB IDE drive
   Apollo ProMedia PLE133T/a Video chip

Both boxes are talking to a Dell E173FP display through a Compaq KVM. 
Display resolution is 1280x1024.

Where can I find instructions on how to re-configure the screen saver so 
it inherits the correct video settings?

Where are the rest of the video settings saved so I can enable some of 
the options that don't show up? For example, in System Settings->Dislay 
the second box only shows a 60 Hz Refresh option. I need to enable and 
select 75 Hz. The file I was expecting, /etc/X11/xorg.conf, is not there.

Where can I find instructions on how to install and switch to XFCE?

Bob McConnell
N2SPP

(*) I am trying out Fedora 11 for several reasons. First, at work we 
just switched hosting providers which also means we switched our servers 
from Red Hat to CentOS. After the switch, IT will no longer be managing 
our external or internal servers. So I need to learn enough about the 
environment to keep the development and QA servers in sync with the 
hosted servers. Second, Slackware 13 does not play well with the Intel 
video chips in most of my Dell computers. i.e. both the live CD and 
install CD produce unusable configurations even in CLI modes. I have 
been using Slackware since 1993, when it replaced my original Soft 
Landing Systems 1.02 system (kernel 0.99pl12). But I have not been happy 
with many of the recent choices made by that group. These two reasons 
finally shoved me past the tipping point to begin leaving Slackware.