[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

Bernd Steinhauser <linux at bernd-steinhauser.de> changed:

           What    |Removed                     |Added
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                 CC|                            |linux at bernd-steinhauser.de

--- Comment #4 from Bernd Steinhauser <linux at bernd-steinhauser.de> ---
Can confirm, I see this, too:

kernel: [drm:radeon_dp_link_train] *ERROR* displayport link status failed
kernel: [drm:radeon_dp_link_train] *ERROR* clock recovery failed
kernel: [drm:radeon_dp_link_train] *ERROR* displayport link status failed
kernel: [drm:radeon_dp_link_train] *ERROR* clock recovery failed

The screen is an Eizo EV2455. GPU is an AMD Kaveri on Linux 4.4.0.

What I noticed is, that I only get this, if I set
Option      "TearFree" "Off"

and maybe (didn't test explicitely, but it was set at the time):
Option      "DRI" "3"

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