I have a U2415 connected to a Latitude E6440 via the HDMI port, and the display periodically goes blank for a second or two and then restarts. The laptop has the Radeon 8690M add-on GPU, and I have updated to the latest Dell-supported drivers. I *think* there is some correlation to how busy the computer is, but would not swear to it.
I have seen a number of posts regarding blanking by this display in a number of other configurations, but none with plain HDMI connection. Is there anything I can try to make this stop?
Also, I have a second (non-Dell) computer with an Nvidia GPU that works just fine with the monitor - no blanking.
Thanks