This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1999189
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1999189
Title:
Displayport monitors hang on blanking and must REISUB my 20.04.5
system
Status in linux package in Ubuntu:
Incomplete
Bug description:
I've been getting issues with my 2 DP monitors (and system) not
recovering from blanking (possibly 100% of the time). If I disable
blanking, the issue never occurs. I am forced to REISUB the system to
regain access.
As I'm using amdgpu from the HWE kernel, my best guess is thats where
the issue lies.
When the issue occurs I am completely unable to access the system due
to a softlock and CPU getting maxed by Xorg. SSH barely works and the
system doesn't respond to request to perform dumps like Alt-
PrintScreen-1.
The only relevant output I have seen (as a user) is in syslog, and
possibly dmseg. I am not sharing anything yet until I get some clear
directions on exactly what is required and how I can share it.
In addition, when I try to submit an apport-bug it fails (multiple
times). Here is the Error ID: OOPS-108b77945d65b4a0f23eba000f0d8a8e
while trying to wait for the launchpad page to process my data.
As of now I have no way to share any data other than pasting it in a
bug report. Unless there is another way to automate the data
collection. Which I'd prefer by far.
Finally, as I'm more of a user, I can only likely manage to test
anything with some decent instructions. This issue has been going on
for a few weeks, and due to a recent hardware change I cannot confirm
if there was a time when my current system did not have the issue.
OS: Description: Ubuntu 20.04.5 LTS
Release: 20.04
System: Asus PN51-E1 (minipc), 32 GB RAM, AMD Ryzen 7 5700U with Radeon
Graphics
2 DP monitors
DP to DP cable
USB-C to DP cable (tested without this connected and it makes no difference)
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