The problem was probably caused by dist-upgrade, or not booting between upgrade and dist upgrade.
I installed from scratch using "Ubuntu Dapper Flight 6 i386 install CD", then ran "sudo apt-get update && sudo apt-get -y upgrade", rebooted, and gdm screen came up. After showing gdm screen, for about 20 s the computer did not react to mouse or keyboard, then started working. -- Complete freeze on boot https://launchpad.net/malone/bugs/38856 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs