Comment # 3
on bug 109122
from Matej Lach
I can confirm this bug is indeed present. Worth noting that the screen is only blank on the laptop built-in display, (after KMS), external monitors work fine. Adding `amdgpu.dc=0` to the kernel parameters resolves the issue for me, but this was not necessary before kernel 4.19.9, so it seems like a regression. [1] seems related. 1 - https://bugzilla.kernel.org/show_bug.cgi?id=200695
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