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#1 2018-11-29 20:32:50

sbskas
Member
Registered: 2018-11-29
Posts: 2

Generic Résolution with 4.19 kernel - 'No EDID Read'

After upgrading kernel to 4.19-1 trough 4.19-4 version, framebuffer is set to 1024x768 generic resolution.

In the kernel logs, an error is shown :

dmesg wrote:

[    2.133074] [drm] Display Core initialized with v3.1.59!
[    2.148452] [drm:dc_link_detect [amdgpu]] *ERROR* No EDID read.

Reverting back to 4.18.16.arch1-1 fixes the problem.

It seems something is subtly wrong with monitor communication.

This problem has already happened with a previous kernel.

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#2 2018-11-29 21:02:48

loqs
Member
Registered: 2014-03-06
Posts: 6,370

Re: Generic Résolution with 4.19 kernel - 'No EDID Read'

Welcome to the arch linux forums sbskas.  Is 4.19.5.arch1-1 in testing affected?

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#3 2018-12-01 01:31:27

sbskas
Member
Registered: 2018-11-29
Posts: 2

Re: Generic Résolution with 4.19 kernel - 'No EDID Read'

Kernel 4.19.5.arch1-1 has the same bug.

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#4 2018-12-01 13:43:41

loqs
Member
Registered: 2014-03-06
Posts: 6,370

Re: Generic Résolution with 4.19 kernel - 'No EDID Read'

Next I would suggest trying 4.20-rc4 using the linux-mainline package from AUR or miffe's unofficial repository.
If that is still affected I would suggest trying linux-amd-staging-drm-next-git if that is still affected then I would suggest bisect between 4.18 and 4.19.

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