[Bug 200695] Blank screen on RX 580 with amdgpu.dc=1 enabled (no displays detected)

https://bugzilla.kernel.org/show_bug.cgi?id=200695

wevsty (ty@wevs.org) changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |ty@wevs.org

--- Comment #46 from wevsty (ty@wevs.org) --- I have the same problem.

Kernel version 5.4.0-39-generic on ubuntu. Graphics card: AMD RX580. Motherboard: ASRock Z87. Monitor: Compaq x22LED (Using HDMI to DVI-D adapter connected)

If you use the default configuration the startup will quickly black screen, if you use amdgpu.dc=0 it will display normally.

I'll post the demsg that provides when the dc is 0 and 1 to help diagnose the problem.