Comment # 1 on bug 905565 from Jochen Schroeder

I'm affected by this bug as well. This is HP Zbook 14 (which is officially
supported by SuSE enterprise. 

sudo lspci |grep -i vga
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 09)
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars
[Radeon HD 8730M]


I also find that if I try to use vgaswitcheroo to switch to the discrete
graphics card with:

echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch

results in 
Dec 01 14:12:19 linux-fa1o.site kernel: vga_switcheroo: client 0 refused switch

this seems to be because pulse audio is using the integrated card for audio. 

If I kill pulseaudio, the same command results in an unresponsive screen after
restarting X however. By that I mean I only see the cursor on the top left
(without it blinking) and I can't switch to any other VT. However I can push
the power button and the laptop shuts down. However I don't have any error
related to this in the logs.