[Bug 97031] Pentium N3700, after boot DisplayPort signal blank/black (edit: for some resolutions, it seems)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97031

mattias.slabanja at gmail.com changed:

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--- Comment #6 from mattias.slabanja at gmail.com ---
Created attachment 130169
  --> https://bugs.freedesktop.org/attachment.cgi?id=130169&action=edit
dmesg from drm-nightly kernel

I uploaded a new dmesg dump from a run with kernel option "drm.debug=0x1e".

Summary:
I booted computer (in this case, two monitors attached, one DP and one HDMI)
with drm.debug=0x1e.
After boot, when reaching gdm login, DP-monitor goes black (similar as before).
Logging in to the computer via ssh, and, using xrandr, changing DP mode to
1920x1080, make DP-monitor start showing gdm login screen.


Kernel version used:
"""commit d2ceef096ea6215af6a46a98ad5103d4d98bcb58
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Sat Mar 11 11:52:09 2017 +0100

    drm-tip: 2017y-03m-11d-10h-51m-17s UTC integration manifest
"""

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