Weird Bug

[dpaanlka]

On my Mac Pro, I have my normal account and a guest account setup for friends who come in my room that may want to use my computer. My screen saver is set up to automatically come on after ten minutes, and it is password protected, but if somebody wants to use my computer they can click "Switch User" as I have fast user switching enabled.

Anyway when they click this, the screen goes all crazy for a moment as the Quartz Extreme cube action happens, then it goes back to normal.

This does this with every screen saver I have tried.

Is there a reason it does this? Does it do this for anybody else?

 

[lancestraz]

I have a iMac G5 that did the same thing. Apparently it had a faulty logic board. Got it replaced and the problem is gone.
Now, I kinda doubt this is what is wrong with your Mac Pro; thought I would throw it out there anyway...

 

[mad jew]

Whaddya mean by crazy?

 

[dpaanlka]

Whaddya mean by crazy?

All sorts of random colors and lines and artifacts just appear out of nowhere and fill the entire screen.

 

[wrldwzrd89]

All sorts of random colors and lines and artifacts just appear out of nowhere and fill the entire screen.

Hmm... this sounds like a Quartz Extreme bug. Do you have the preliminary support for Quartz 2D Extreme enabled in Quartz Debug? If you do, disable it.