I recently tried a live CD of Ubuntu which might have caused this? When the computer goes into the standby, haven't tried it from shut down yet. But i get the error message "Warning! Now system is in safe mode. Please re-setting CPU frequency in CMOS setup." I usually go into BIOS look around and exit, and then its fine. THis problem just started happening so i don't know ... I'll experiment around a bit more but any thoughts?