[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 #6 from Thomas Langkamp (thomas.langkamp at medicalschool-hamburg.de) ---
(In reply to Thomas Langkamp from comment #5)
> Created attachment 290817 [details]
> 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.

Still, Mainboard being part of the problem or not - all was fine til I switched
the Fury X to the 5700 XT (first an ASROCK, now a Gigabyte one).

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