I have similar problem after installing Mandrake 10.1. It's simply freeze after boot.
Solution (temporary of course), disable acpi!
If you still can't access your linux, during LILO, edit your command-line and simply add this word "ACPI=off" (without that " " thing)
Then in your Xwindows, goto configuration, autoboot, and make sure uncheck ACPI.
Hope it'll help.
Any solution for MODEM anyone?