[Bug 208573] Black screen on boot if two displays plugged in with NAVI 10

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=208573

--- Comment #5 from Thomas Langkamp (thomas.langkamp at medicalschool-hamburg.de) ---
Created attachment 290817
  --> https://bugzilla.kernel.org/attachment.cgi?id=290817&action=edit
reproducable error messages after suspend, then reboot

This error message is reproducable if I boot
- with 1 display
- on KDE connect second display
- suspend, then wakeup (both screens work normal until this point)
- then reboot => error message, then black screen on one and green screen on
secondary display.

Because my Mainboard got a new Bios I tried that with no effect. But I
realized, that I get the black screen only if I dial in the 3200 Mhz XMP
Profile of my RAM. If not - there is no black screen with 2 displays on the new
BIOS. On the old BIOS XMP Profile or not made no difference. Thus the mainboard
may be part of the problem.

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