Im running knoppix 6.5 HD on a Asus Eee PC, i usually boot with acpi=off or aspi_osi=linux (or else screen will go blank), and the system boots and works for a while, but then programs start closing, and menu's stop working, and the system won't let me shutdown.
It also sometimes opens a black screen with some options something like
Code:
Module Loader present

Markers: (--) probed, (**) from config file, (==) default setting,

        (++) from command line, (!!) notice, (II) informational,

        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
Any idea whats going on?