[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c

CC Stefan Bader -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2070096 Title: [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]]

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c

I suspect I experience the same problem with a Vivobook Go. I got messages like "[174397.518333] [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c" in dmesg and the screen go black and stay like that for a while regularly. -- You

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c

And that commit did go back to stable: https://git.kernel.org/stable/c/6266b3a312b7f69c883c2d7c82d85772464421d2 So I guess Canonical team missed it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c

Here's at least part of the problem. commit 15c983d0cbb5a158eafb9cb88e6d8dfc4477d9c2 Author: Melissa Wen Date: Fri Dec 29 15:25:00 2023 -0100 drm/amd/display: fix bandwidth validation failure on DCN 2.1 BugLink: https://bugs.launchpad.net/bugs/2059068 commit

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c

** Summary changed: - [amdgpu] Graphics driver issue: Display goes black for a second at random + [amdgpu] Graphics driver issue: Display goes black for a second at random: [drm:link_enc_cfg_validate [amdgpu]] *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c -- You

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random

Daniel, I'm seeing this same issue on the Lenovo Z13 gen2, which is certified by Canonical to work with 22.04 (and that is indeed what I'm running): https://ubuntu.com/certified/202310-32232 I logged a dupe at https://bugs.launchpad.net/ubuntu/+source/linux- signed-oem-6.5/+bug/2070960 before

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random

Update: The problem occurred again with the changed firmware, so please ignore my earlier message about the firmware. I will run with the older 6.5.0-1023-oem for now to see if it works.

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random

Hi, I believe the blank screen always corresponds with a dmesg entry: *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c This is not necessarily accompanied by a call trace. It appears my hardware is similar to nikhilkaushik, they're both fairly new thinkpads (AMD) I have

[Bug 2070096] Re: [amdgpu] Graphics driver issue: Display goes black for a second at random

Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: linux-oem-6.5 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2070096