I got my retina Macbook Pro this week and have been waiting for my Thunderbolt to DVI adapters to get here so I can hook them up to my external displays. In the meantime, I am using an HDMI to DVI cable to hook up to my monitor.
I've noticed every once in a while, the monitor I am using will sometimes go blank for a second and then back. It doesn't happen very often, but I'm not sure if this has to do with the cable, monitor, or my retina Macbook Pro.
I've tried multiple cables, and have been using this monitor previously to the retina Macbook Pro, so I don't think the monitor is the issue.
Do you think this is an issue with the laptop? Something graphics card related? I can't seem to figure out why this randomly happens.
I was able to catch this happening on video…
Best Answer
Try disabling Automatic Graphics Switching in the System Preferences-Energy Saver. This may be working for me, though I haven't figured out how to reproduce the 1-2 second blanking, so only time will tell.
I'm running 10.8.2 on a new rMBP and have the same issue - The external display goes blank for 1-2 seconds when connected to a 1680 x 1050 display via the HDMI connector and the rMBP is closed and in a stand. There is no movement of the rMBP, the HDMI cable or monitor when this happens.
I have not experienced the same momentary blanking of the rMBP's display when using only the native display.
It doesn't happen often (2-3 times per day) so it's more of an irritation that I don't expect from a nearly $3,000 piece of hardware.