Currently Being ModeratedJul 2, 2012 2:59 AM (in response to TimQ)
I have the same problem - freezes, screen break up and crashes, again and again. Most recently this morning, when just scrolling up a screeen.
This is lion 10.7.4 - and a 24" early 2009 iMac. It's been here since lion arrived.
There's now talk that this might be fixed in 11.00. I certainly hope so.
I can't even sell my iMac when it has this problem, to get an upgrade - it wouldn't be fair to the buyer. I'm just stuck with it.
A guy from Apple called a while back saying that they were working on this - but it turned out they were only working on the problem with 2011 iMacs - it's exactly the same thing, though NVDA OpenGL Channel Exception GR: SW Notify Error lots of times in the logs.
Currently Being ModeratedJul 2, 2012 1:39 PM (in response to Fustbariclation)
I'd definately be reporting this one to Apple. It seems that of those of us with newer hardware that the graphics issues were fixed with 10.7.2 update.
You can report OSX issues with apple via http://www.apple.com/feedback/macosx.html
Don't forget to include your system information using apple=>about this mac so that they can look for a fix for your particualr model. And of course if you have any friends with this same issue and models get them to report it too.... the more people with the issue, the more likely it is to be looked as a a priority.