Hi Troy: Unfortunately the changing repository stuff didn't work, any other suggestion... The second question is related to change the screen resolution. We recently moved from Debian Sarge to Scientific Linux 5.0. We installed SL in a Pentium III Celeron at 1 GHz and everything works fine, except the screen resolution. The Monitor is a Compaq MV-540 and was working fine at 1024x768 resolution, with SL 5.0 the maximum resolution is 800x600. Then we try to change using the GUI interface on System/Administration/Display and it doesn't change the resolution. Also we try changing by hand in /etc/X11/xorg.conf, but it doesn't work too. Any suggestion will be appreciate. Thanks in advance Ricardo