When I connect an external monitor to my new MacBook Air via Mini DisplayPort to HDMI, I see the extended desktop but there are snow-like artifacts. When I change the resolution to 720p, the screen looks normal.
- MacBook: 13" i7 MacBook Air (late 2011)
- Monitor: 23" ASUS VH236H LCD
- Adapter: non-Apple Mini DisplayPort to HDMI
I have tried other standard resolutions (1024×768 and higher) with the same effect. I have also tried toggling between 50hz and 60hz, 1080i and 1080p, each of which causes the same issue.
I get the feeling it has something to do with my relatively cheap adapter cable, but am unsure. Thoughts?
Best Answer
Likely to be the adaptor cable if it's cheap - might not be able to handle the HD throughput (although outputting to HDMI, you'd think it'd be able to).
While this sounds counter-intuitive, try moving around the alignment of the second screen as this might ditch the 'snow'.
Also, have you tried the screen with any other HD inputs?