Comment 28 for bug 1313539

I'm also experiencing this problem.
I had the following configuration:

MacbookPro 8,1 13" laptop (2011)
Dell UltraSharp U2715H LED monitor
Ubuntu 14.04
Mini-Displayport (computer) to Displayport (monitor) connector

I had those annoying 2-3 second unpredictable intermittent blanks, driving me crazy.

I used to have the problem with a Dell 24in monitor 2408WFP as well (same computer).
I figured it was something to do with the monitor and bought the new monitor (since we needed a second one anyhow).

But the problem persisted with the U2715H.

I figured it might be something to do with the computer (anecdotally it seemed to occur more often when it heats up, though I'm not certain).
I needed to change that old computer anyhow, so I bought an Intel NUC to replace the laptop.

New configuration:
Intel NUC NUC6i5SYH w/ 32GM of RAM
Dell UltraSharp U2715H LED monitor
Ubuntu 16.04
Mini-Displayport (computer) to Displayport (monitor) connector (same cable).

Lo and behold... same problem!

All that leaves is
- the cable, or
- the software.

Now I just got myself an HDMI to HDMI cable to the Intel NUC.
Just began testing. Hopefully the problem will be gone.

Happy to test again later if someone fixes the bug--contact me <email address hidden>