First this stupid bug crops up in 4.2 kernels and pulls a
gauze film over my screen at home where I use Intel
graphics and a Samsung TV as a display:
https://bugs.freedesktop.org/show_bug.cgi?id=92206
I can work around this by using the old 4.1 kernel
in fedora 22, but there is no 4.1 kernel for
fedora 23.