What is this and how can it be fixed/avoided?

[NStocks]

Hi,

Every so often when I'm in safari and change between applications, parts of the webpage remain on screen, either when I change application or open another tab. The issue usually goes away when I go into Exposé but today I had to restart.

I'm not to worried about it but I wasn't sure if it's hardware or software issue. I've ran the Apple Hardware test and No problem where found...Would disabling "auto graphics switching' change it ?

My spec is in my Signature.

Thank You

 

[Grannyville7989]

Hmmm...

Have you tried creating and working in another account to see if it happens then?

The only real way to know if it's software related would be to do a clean install of the operating system.

 

[NStocks]

Hmmm...

Have you tried creating and working in another account to see if it happens then?

The only real way to know if it's software related would be to do a clean install of the operating system.

No I haven't tried that... It's only a month or so old (it was a replacement). Again, it doesn't happen that often so by creating another account could take a long time before I see it...

Do you know what it is exactly? Is it software related?

 

[Grannyville7989]

I haven't seen anything like that before, no.

 

[creative78]

Just noting I've had this exact same problem. It's probably happened twice since I got this new machine (also a replacement). I've not managed to figure out what causes it.

 

[mulo]

I haven't seen anything like that before, no.

this used to appear on my old mac when changing into safari, it usually helped to clear the cache.

 

[noire anqa]

If the AHT says no problems then yes it could well be software.
However i fried a powerbook once and the AHT still said everything was fine ..

If you can get a copy of TechToolDeluxe (provided free if your ordered extended AppleCare) that can test your GPU vRAM.

I'd highly recommend you use that to test your system. If TechTool also says everything is fine then it indeed looks like a software glitch.

You could try reinstalling the OS. That should be easy to do - you can install straight over the top of your current installation (no need to erase first) and it will preserve all your user data and applications. It only overwrites the system folder.

Failing that, the problem may well be down to a rare bug in the video drivers - in which case none of the above steps will make any difference. You'd just have to wait until they get updated in a future system update.

Good luck!

 

[NStocks]

I've just selected the auto switching graphics and when checked, the screen goes crzty (Intel HD Chip) but when unchecked, the screen goes fine. I may just leave it unchecked... I'm always plugged into a outlet anyway.

 

[noire anqa]

I've just selected the auto switching graphics and when checked, the screen goes crzty (Intel HD Chip) but when unchecked, the screen goes fine. I may just leave it unchecked... I'm always plugged into a outlet anyway.

Sure, as long as you're happy doing that. Doesn't tell you what the actual problem was (software vs hardware) but at least it won't bug you anymore.