Static / snow on external display when waking up Mac
I have a Philips 222E display connected via a mini-DP to DVI adapter and DVI cable to a Macbook Air (mid-2011).
Every time that the MBA wakes from sleep, the display shows this static:
The static is replaced with the proper desktop image after around 20 seconds, or after a power cycling the display (which could take only 10 seconds but is highly annoying just the same.)
Things I tried and their results:
- A different display (LG) - no static
- A different computer (Mac Mini) - no static
- Different adapter and DVI cable - static remains
- When booting the MBA (not rebooting) - no static
- When disconnecting and reconnecting the 222E to the MBA - no static
Solution 1:
I've been investigating a little bit and would be good for you guys have a try with this steps. The steps are written for a different type of Display, but can get the idea:
Under "SIZE & POSITION" menu, go to "Image Size" and set to "Screen Fit"
Under "SETUP & RESET" menu (down on the second page with my model), go to "Auto Source" and set to "Manual"
Finally,still under the same "SETUP & RESET" menu page, go to "PC/AV Mode" and set to "AV"
Bingo! Now when the computer wakes up from sleep, the screens are going back on like a charm!
Here's the source:
https://discussions.apple.com/message/13221480#13221480