Comment 29 for bug 1634449

On my new desktop machine I'm having dual monitor setup. Sometimes one of monitors gets black for a second and then shows image again - this happens when mouse cursor goes from one display to another. Also, when running an OpenGL application, if it starts on one specific monitor, the whole screen flickers quite badly with random rectangles starting at mouse cursor position. If same app starts on another monitor, no flashing occurs. Vulkan demo apps also don't exhibit flashing. This happened when one monitor is connected to DP, while the other on HDMI. Using different connections, e.g. DP 1.2 with two monitors chained, I couldn't reproduce the flashing, but still, each of them can go black intermittently.

OS: Ubuntu 16.10 64-bit
Kernel: 4.8.0-26-generic
CPU: Intel Core i7 6700K
GPU: HD Graphics 530 (Skylake GT2)
Multi-monitor setup, where one monitor is in portrait orientation.

Note that I haven't experienced any of this issues on exactly same monitor setup, but Haswell 4790K setup and Xenial (Xenial on my Skylake machine doesn't work with aforementioned monitor setup at all).