[Bug 212959] New: [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed to find connector for link!

[Bug 212959] New: [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed to find connector for link!

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

            Bug ID: 212959
           Summary: [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed
                    to find connector for link!
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4, 5.8
          Hardware: Other
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: tob88570@gmail.com
        Regression: No

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.

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[Bug 212959] [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed to find connector for link!

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

tob88570@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tob88570@gmail.com

--- Comment #1 from tob88570@gmail.com ---
Little correction *as well as Linux Distros with Kernel 5.8 not necessarily
based on Ubuntu 20.04.

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[Bug 212959] [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed to find connector for link!

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

Alex Deucher (alexdeucher@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #2 from Alex Deucher (alexdeucher@gmail.com) ---
Please attach the dmesg output for your system.  Other than the error, is the
GPU otherwise working correctly?

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[Bug 212959] [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed to find connector for link!

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

--- Comment #3 from tob88570@gmail.com ---
Created attachment 296713
  --> https://bugzilla.kernel.org/attachment.cgi?id=296713&action=edit
Dmesg output

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[Bug 212959] [drm:dm_helpers_dp_write_dpcd [amdgpu]] *ERROR* Failed to find connector for link!

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

--- Comment #4 from tob88570@gmail.com ---
(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.

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[Bug 212959] [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.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

tob88570@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[drm:dm_helpers_dp_write_dp |[drm:dm_helpers_dp_write_dp
                   |cd [amdgpu]] *ERROR* Failed |cd [amdgpu]] *ERROR* Failed
                   |to find connector for link! |to find connector for link!
                   |                            |- Exclusively an issue by
                   |                            |booting from mounted ISOs
                   |                            |of respective OS.

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[Bug 212959] [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.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212959

tob88570@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|blocking                    |normal

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