AMDGPU Failed to read EDID from display

Submitted by Michael Lindman

Assigned to Default DRI bug account

Link to original bug (#108806)

Description

Created attachment 142526
boot log showing EDID failure

When connecting one of my monitors to the system it defaults to 1024x768 and not the native resolution and grepping through the kernel logs shows that AMDGPU fails to read the EDID of the display.

[ 5.054779] [drm:dc_link_detect [amdgpu]] ERROR No EDID read.

The display was working fine as of kernel 4.18.18 with the issues arising upon 4.19.2.

I am using a POLARIS 10 GPU and both displays are connected to DisplayPort with the Asus PG2780 having the issues with failing to grab the EDID.

DisplayPort-0 LG 25UM65-P
DisplayPort-1 ASUS PG278Q

Attachment 142526, "boot log showing EDID failure":
dmesg.log