I think this Bug is related to https://bugzilla.redhat.com/show_bug.cgi?id=1353008 but it have got the problem under Fedora 26 alpha, so I submit it a a new one. Under Fedora 26 alpha in 4k resolution the screen is flickering/shaking around. When I move the mouse, the problem disappears. When starting glxgears, there is at least less screen shaking. When I set the resolution to 1920x1080 the problem is gone away. this is my uname -a output: 4.11.0-0.rc6.git0.1.fc26.x86_64 My hardware: Lenovo Yoga 910 with a 4k screen. I have set this, but this doesn't resolbe the issue: /etc/modprobe.d/i915.conf options i915 enable_psr=0 enable_fbc=0 enable_rc6=0
Screen does not flicker and shake with an external FullHD Monitor attached, where the FullHD is in normal DPI mode (window scaling 1 automatically applied) and the built-in 4k monitor is in 4k resolution and HiDPI mode (window scaling 2 automatically applied). Have to test again with external monitor not attached, later this day.
More testing: - screen does not flicker with any resolution other than the native 3840x2160. - screen does not flicker with older 4.10.10 kernel.
*** This bug has been marked as a duplicate of bug 1353008 ***