(In reply to Robby Engelmann from comment #8) > Oh, I have to mention that I am using kernel 4.6 rc7 from kernel:HEAD. With > kernel 4.5.3 I got system hangs upon plugin a second monitor to the HDMI > port. With 4.6rc7 it was solved for me. Ok, great! If you bisect this and find the patch that fixes this, I will backport it to 4.5.3. I can't - I don't have Skylake.