Weird display artifacts after disconnecting from external monitor

I have the same issue, with MacBook Pro 13-inch, Mid 2009 and External Apple 23" CHD on lion 10.7.3.

Having the same problem. 😟

I found a solution on another thread which is described by this video:

http://youtu.be/gmoWoeNrkOs

Essentially the problem is caused by the kext file:

/System/Library/Extensions/AppleGraphicsPowerManagement.kext

So if you move it out of the way as follows (copy and paste the below text to your terminal, and then type your password at the password prompt):

And then reboot. You should no longer have a video problem. Apparently, the Graphics power management makes changes to the video card parameters that cause the video artifacts.

If you decide that moving the file was a mistake simply type the command (copy and paste the below text to your terminal, and then type your password at the password prompt):

I hope this helps.

Cheers,

David

not sure... Just tried it and everything was fine... Until I connected it to my Apple Display. But after switching the Colour Profile to the last on the list and back to LED Cinema Display it was gone... Good solution, not sure if definitive thou, but thanks for the tip 😀

cassiofm,

In total I did two things:

1. I put the com.apple.ColorSyncCalibrator directory from ~/Library/Caches into the trash. (Since this is a cache directory, anything important can be rebuilt from the settings)

2. I renamed the AppleGraphicsPowerManagement.kext to AppleGraphicsPowerManagement.disabled

I'm guessing that step 1 will fix your colour profile problem, and step 2 will fix the problem of the OS trying to fiddle with the GPU settings inappropriately.

Cheers,

David

It doesn't help unfortunately ...

I have had luck for two days now, with the solution of trashing the ~/Library/Caches/com.apple.ColorSyncCalibrator

*fingers crossed*

Hi,

I have Macbook pro late 2009, Lion,

but I dont ahev this file or dirrectory on my system. How is that possible?

regards

tomas zeman

That's no problem. Then you haven't used the Color Calibration procedure (accessible via System Preferences -> Displays -> Color tab).

I just want to add that ever since I got the 10.7.3 update I've only seen graphical distortions a few times and they were very minor. I'd say I see distortion 90% less after this update.

FWIW, I've been dealing with this by opening display prefs and picking another profile. Usually puts things back for a while, but I've noticed some serious glitches in the Display Pref Panel. Some profiles help, some go back to the dark color glitch mess, some help then glitch out the next time I pick them.

System details:

Mac OS X Lion 10.7.3

Displays:

Color LCD:

Cinema HD:

Just to add weight to the thread and the problem. I'm having the same issues. Weird colors in some windows sometimes and almost always in the application switcher and the dock. The problems occur when switching external monitors. The colors revert to normal if you reboot with the monitor that you intend to work with (which is annoying).

The problems seem to have started with the update to Lion (or perhaps to 10.7.2 or 10.7.3 incremental updates). I've experienced none of these problems with either Leopard or Snow Leopard before on this computer (MBP4,1; GeForce 8600M GT 256MB).

Have an issue I don't know is related to those above but definitely display related. Have a brand new 2.3ghz i5 Mac Mini connected to a 27 inch Samsung LCD monitor/HDTV via HDMI cable. All the fonts, from icons to the dock, etc. have a white outline that's very bright and distracting. Almost like an outline shadow. Had the machine hooked up via DVI to a 19 inch Lenovo monitor previously and didn't notice this. Is this a display driver issue, a system issue or just something the newer, higher detail monitor is showing? Any way to turn this off?

@JPHuff

this should be the same issue. i'm also having this with the other graphic artifacts.