Bug 212959

Summary:	[drm:dm_helpers_dp_write_dpcd [amdgpu]] ERROR Failed to find connector for link! - Exclusively an issue by booting from mounted ISOs of respective OS.
Product:	Drivers	Reporter:	tob88570
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	NEW ---
Severity:	normal	CC:	alexdeucher, tob88570
Priority:	P1
Hardware:	Other
OS:	Linux
Kernel Version:	5.4, 5.8	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Dmesg output

Description tob88570 2021-05-06 00:23:18 UTC

This error occurs on all distros based on Ubuntu 20.04 with Linux Kernel 5.4 as well as Kernel 5.8, that attempt to load a GUI, upon booting from a mounted iso into said Operating Systems installations.

This error occurs at least for AMD RYZEN 7 4700U Apus with AMD VEGA 7 RENOIR graphics.

Comment 1 tob88570 2021-05-06 00:25:16 UTC

Little correction *as well as Linux Distros with Kernel 5.8 not necessarily based on Ubuntu 20.04.

Comment 2 Alex Deucher 2021-05-06 02:20:07 UTC

Please attach the dmesg output for your system.  Other than the error, is the GPU otherwise working correctly?

Comment 3 tob88570 2021-05-10 23:58:44 UTC

Created attachment 296713 [details]
Dmesg output

Comment 4 tob88570 2021-05-11 00:01:00 UTC

(In reply to Alex Deucher from comment #2)
> Please attach the dmesg output for your system.  Other than the error, is
> the GPU otherwise working correctly?

The GPU otherwise is working correctly. On other Operating Systems.

Also this issue is exclusive to attempting to boot the live systems or installations from a mounted version of the respective downloaded ISO file.

If you flash it to USB, the installation works fine, despite somewhat the same errors. I am writing this currently from a working PopOS installation.