There is a bug in xorg that causes the screen to blank at random while the system is in use. See for example http://www.redhat.com/archives/fedora-list/2004-May/msg07823.html This is a generic xorg bug, not one particular to Fedora: http://freedesktop.org/bugzilla/show_bug.cgi?id=792 I have discovered a work-around you might like to try. In the ServerLayout section of xorg.conf I have added: Option "StandbyTime" "30" Option "SuspendTime" "0" Option "OffTime" "0" This appears to solve the problem on my system. Once logged in to X, it is possible to change the DPMS settings using xset (or the KDE Control Centre) and everything continues to behave as expected. I hope this might be of use to anyone else who had the same problem! Jonathan
