I finally solved the problem, thanks to the help of those who responded. I am running kernel version 2.6.18, and I installed afbinit using: "apt-get install afbinit". Unfortunately, the version of afbinit I got was 1.0-1, and the bug fix is in the newer version 1.0-1.1, for which there does not appear to be a .deb package. I had to download the source code for version 1.0-1.1 from ftp.debian.org and compile it.
My X server starts now. Evidently, you must have afbinit version 1.0-1.1 to make it work. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]