08-15-2018 11:52 PM
For a couple of years I've my Yoga 900 laptop with 2(!) Dell P2415Q 4K monitors using a USB-C to MiniDP dongle. I was shocked the laptop could handle both of these monitors (combined resolution 7680x2160!), but it did just fine. I recently sold them and am now using the laptop with a single Dell U3417W widescreen monitor (resolution 3440x1440). For some reason, even though the new monitor has FAR fewer pixels that the two 4K monitors did combined, the laptop will now frequently get into a state (often after a sleep/wake cycle) where the screen starts blanking out every 3-5 seconds. Usually I can't get it to stop until I do a shutdown and cold restart of the laptop.
I have the latest display driver available on Lenovo.com for this laptop. What's going on here, and how can I fix it?
Thanks in advance for any help!