Possibly related to other bugs posted on the nuveau driver.

Hardware is a brand new Gigabyte P17 v3 laptop. CPU is a i7-4710MQ which has
integrated Intel 3D graphics. Also present is a Nvidia GTX 950M GPU.

I was unable to install openSUSE Leap 42.1 until I realised I had to disable
the Nvidia GPU in firmware. It kept giving lots of kernel messages from nuveau
and then ultimately it would randomly freeze and that's it, system is locked,
no capslock light toggle nothing.

I got all the way to a working system with the Nvidia chip disabled. Pain in
the butt though as I paid extra for it and I need it later. I was not
successful with the proprietary drivers either. X detects the drivers in a
certain order, and picks up intel before nvidia, and I think from memory it
then dies.

So I left it using the intel driver. I had to turn off compositing in KDE
because of horrible graphics bugs. Windows not rendering at all, etc.

So now I have a usable system. I am now running the latest 4.4.0 kernel from
obs:stable. But I think recently it was 4.3.3.

Sadly I pulled in a stack of updates maybe yesterday, and now the following
happens. When I suspend and resume, I get a blank screen. When the screen saver
kicks in after a few min of activity and locks the screen, I get a blank
screen.

I can't ctrl-F1 out to a virtual console. I can't ctrl-alt-backspace to kill
the X server. It's well and truly permanent and I end up powering off.

So I'm posting this as a fresh bug because I think my system is sufficiently
different, and because I can pin it down to whichever kernel or X updates were
posted in the last day or two.