On Wed, 2006-09-06 at 23:07 -0500, Barry Brimer wrote:

Dell Inspiron 600M w/ Radeon 9000 card. This worked with CentOS 4.3, also works with Knoppix 4.0.2. Graphical installation succeeds, but upon reboot, and all subsequent rebbots, graphical mode does not work, the screen becomes black. In addition to the 2.6.9-42 kernel, we have also tried the 2.6.9-42.0.2 kernel. Same problem exists on both kernel. Running system-config-display --reconfig exits with the error "fatal IO error 104" Connection reset by peer.

Any ideas would be greatly appreciated.

If you <Ctl-Alt-F1> can you get a login prompt? If so, look at /var/log/dmesg, /var/log/messages and /var/Xorg.0.log (IIRC).

There may be some clues in there. Comparing the Xorg log to a previous version might yield a clue.

An lsmod to see if a radeon module has been loaded? Keep an eye out for radeonfb as well. DRI is supposed to be unstable with radeons (although I run it NP). Keep an eye out for that and make sure the Xorg log shows it is disables.

Go to /etc/X11 and see if an Xorg.conf exists. If so, look at it and sett any resolutions to lowest/plain vanilla to start with.

Thanks, Barry

<snip sig stuff>

I'm a novice at this stuff, but I have the time to reply.

HTH -- Bill