CC Stefan Bader
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Title:
[amdgpu] Graphics driver issue: Display goes black for a second at
random: [drm:link_enc_cfg_validate [amdgpu]]
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.
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You
And that commit did go back to stable:
https://git.kernel.org/stable/c/6266b3a312b7f69c883c2d7c82d85772464421d2
So I guess Canonical team missed it.
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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
** 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
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You
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
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.
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
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-oem-6.5 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2070096