[ubuntu] X crashes IBM T20 every second bootup

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http://ubuntuforums.org – I have commandline Ubuntu (originally I think it was Xubuntu) 8.10 installed on an IBM T20, and I it freezes right after "starting Gnome Display manager" every time I start it up. I have to do a hard reboot, and it usually starts successfully right afterwards. I installed fluxbox and removed gdm and xdm, so I boot right into a command line with no problem. However, when I typed "startx" the computer freezes again until I do a hard reboot! The nature of the terms of the problem, "computer freezes every other bootup," "X crashes half the time," etc, make this very difficult to Google. Can someone help me at least obtain the crash information so I can research this a little more and put an end to it? It's driving me crazy! (Hardware)