I'm not sure if it would be helpful to mention this here as well, but I believe I've found a bug in the standard PS/2 wheel mouse driver.
I have done this on numerous hardware platforms and it does the same on all. The only common thread here I believe is I'm using Microsoft wheel mouse. Currently I'm testing with a PS/2 Intellimouse. During Mandrake installation if you select a standard PS/2 wheel mouse it is fine until reboot after installation is complete. Then the mouse doesn't work and it goes crazy. Jumping all over and causing erratic behavior. If I install using just the standard PS/2 mouse driver then it works fine after reboot. Then I can go into Hard drake and change it to a wheel mouse and all is fine. This has been this way all the way back into mandrake 7x days. I am using a Belkin KVM switch at work and I have discovered that switching from the linux box and back again, causes the same behavior. the mouse cursor drops to the lower left corner and goes crazy when you move the mouse. I have found that if I do a CTRL-ALT-F1, and then ALT-F7 the mouse driver is fine. I believe the two incidents are related but I don't know what is causing it. The reason I bring this up is that I have seen many many complaints about mouse driver problems and I suspect it may be related. Just my 2 cents worth.
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