This is a little strange... I have an iMac G5 / 2.0 / 17". It has been a champion thus far. I have it set to require a password to wake from sleep. I tried for kicks installing Vista under QEMU. This was probably a stupid idea. The installation was slow and laborious and never really finished. While I wasn't paying attention, the computer shut down the screen, I think while Q had control of the mouse. I could not get the screen to unblank. I had to force power-down. Since then, the computer has failed to wake properly the majority of the times... It starts up, but the screen never wakes and I never get to the password window. Any thoughts?