On Tue, Jun 30, 2015 at 10:13:35PM +0200, Michal Hocko wrote:
On Tue 30-06-15 18:59:29, Daniel Vetter wrote: [...]
I looked at dmesg, nothing out of the ordinary there. Unfortunately also no hints why the pipe is somehow off when we think it's on. Can you please test the below patch and grab a new dmesg?
Attached.
I'm still baffled - looking at the code intel_crtc->active should be set, but somehow the real hw pipe is dead. Or at least we don't get a vblank irq for it somehow. Confusing.
Also it might be time to start bisecting this if you can readily reproduce it.
Yes, I can reproduce it just by switching to the text console. Sometimes it is the first attempt already but sometimes it takes several attempts. I will try to go back to 4.0 and bisect it then.
Yes please do, since this is a confusing regression I think the bisect result will be the fastest way forward. -Daniel