I've been using the Gnome fallback mode in F15 x86_64; old hardware and preference. However it seems to not agree with my crt monitor, and has been lately causing the monitor to go blank on context switches between console and X. The only solution has been to turn it off and wait for a while. I thought it was hardware failure, but I've been testing xfce and it doesn't seem to cause this problem. But the switch between workspaces is taking 5 to 10 seconds in some cases, and never less than 2 to 3 seconds. In Gnome fallback, switches of workspace are basically instantaneous. Since I use workspaces to group and organize usage, the slow switch is a real annoyance. I have found no web noise about this problem, so I assume is is only me and there is some setting that is causing this. But I can't find anything. Does anyone have a suggestion of what might be causing this slow workspace switching in xfce and how to fix it?