On Fri, 2016-08-26 at 09:10 -0400, James Bottomley wrote:
We seem to have an xrandr regression with skylake now. What's happening is that I can get output on to a projector, but the system is losing video when I change the xrandr sessions (like going from a --above b to a --same-as b). The main screen goes blank, which is basically a reboot situation. Unfortunately, I can't seem to get the logs out of systemd to see if there was a dump to dmesg (the system was definitely responding).
I fell back to 4.6.2 which worked perfectly, so this is definitely some sort of regression. I'll be able to debug more fully when I get back home from the Linux Security Summit.
Sorry, ignore the logs: they're from a previous bug; as I said I'll try to gather logs when I get back to a more controlled environment over the weekend.
James