Comment # 4 on bug 1186423 from Luquet

Hello.

Ok, to test, i try a live usb of manjaro ==> same problem.
So it's not related to opensuse.

But, i found a solution, if i set my display not to choose the source
"automatic", but in HDMI only, the display turn off.

So it's seems it's something problematic between a firmware (bios related? Or
amd microcode?) and the display. 
I think the display switch to display then back to hdmi, and so the computer
find the display and display back the picture, so the display does not go to
suspend mode.

It could be a display bug but, it works in automatic with other computer with
intel igp, so i would say it probably is an amd bug but could not be sure.

Perhaps we could close has there is a workaround and that it's not related
directly too openSuse.




To conclude, the solution: "Disable automatic source, and set it to HDMI only
in the display OSD".