Hi,
My apologies in advance if this is the wrong place to enter this note.

I'm running Slackware 12.2 on an old T22. It has a savage video chip. I was having a problem that whenever I exited X11, or used <ctl><alt><Fn>, the X system would hang and the screen would go black. Sometimes I could see a brief instance of text from the terminal. Only a power cycle would bring the computer back.

Checking /var/log/Xorg.0.log, there were no errors being reported by X11.
The nice thing about the new X system is that it generally autodetects everything, so no configuration is necessary. At least in most cases, so I ran xorgconfig, and got a simple xorg.conf file. This performed more poorly than the autodetect method.

I'd used the latest revision of Knoppix, and found the X11 behavior to be quite acceptable, with no hang-ups.

I booted to that disk, and checked to see if it had specified xorg.conf, and it did. Copying it over to the hard disk, I had to edit one line to include a driver module which Knoppix would ordinarily autodetect.
This xorg.conf is performing well, no issues with hang-ups or switching to alternate TTYs.

At some point I will dig into the configuration to see what options actually fixed my issue. In the meantime, maybe this will be helpful advice for someone.

Using xorgsetup is very easy, and I can tell you that for me, personally, it worked perfectly. I checked the manual for my monitor, etc. and it worked perfectly. No problems.