[Macpartners] iMac Graphic Artifacts with Leopard 10.5.5

[Brian Bulmer]

So this is just a poll to see if others are experiencing my same issue.

I've had two instances of iMacs, the newer Aluminum 2.x Ghz ones, that  
have slight problems with graphics following updates to 10.5.
Issues are lines across the screen, all vertical of varying colors,  
like a straight rainbow. When moving over them with the mouse they  
will eventually disappear, but sometimes the machine will lock-up.
A simple reboot usually resolves the issue, and sometimes the issue  
never comes back. However, I'd feel safer knowing I have determined  
the issue and fix, rather than just disregarding it as a fluke.

I've found posts about faulty ATI Radeon chipsets, that are supposedly  
fixed with the graphics firmware updates 1.1, and 1.2; and other  
people reverting to an earlier graphics driver manually to resolve the  
issue, but none seem to be a 100% fix.

Any other sightings or success/failure stories out there with these  
iMacs?

Brian Bulmer
DITR Information Technology Consultant
Information Services and Technology, MIT
Office: (617) 253-2163
bbulmer at mit.edu
http://web.mit.edu/ist/teams/ditr
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