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

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

--- Comment #9 from Thomas Langkamp (thomas.langkamp@xxxxxxxxxxxxxxxxxxxxxxxx) ---
Yes. With the new BIOS this is reproducible only with XMP enabled.

In the other bugreport I read about

amdgpu.ppfeaturemask=0xffffbffd

I just tried it. Until now this seems to fix it, even with XMP profile 
enabled! I will report back if I get a black screen again.
As far as I know with 2 monitors attached the VRAM is always clocked 
high, so it makes sense that disabling the VRAM power management through 
this featuremask works around the issue. But surely a proper fix would 
be appreciated.

Am 10.08.20 um 16:33 schrieb bugzilla-daemon@xxxxxxxxxxxxxxxxxxx:
> https://bugzilla.kernel.org/show_bug.cgi?id=208573
> 
> --- Comment #8 from Alex Deucher (alexdeucher@xxxxxxxxx) ---
> Do you only get the MCE errors when you set the XMP profile?
>

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