I have a Compaq ProLiant 1600 that was running the stock 3.0r1 kernel
(2.2.20-idepci).
I upgraded it via apt-get to 2.4.21-5-686-smp.
While using 2.2.20-idepci, the mouse worked fine in X (using icewm).
Since upgrading to 2.4.21-5-686-smp, the mouse no longer works. I have
tried two different PS/2 mice and a serial mouse.
I have ran 'dpkg-reconfigure xserver-xfree86' about 50 times.
I ran 'modconf' and made sure the PS/2 input device module was loaded.
There is no error. As a matter of fact, the mouse ~pointer~ is there in
the middle of the screen... it just doesn't move.
If I use the LILO menu to boot back into the old kernel, the mouse works
again.