Bug 2227427 - External monitor don't work since kernel 6.4.4
Summary: External monitor don't work since kernel 6.4.4
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 38
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-07-29 15:45 UTC by bc5548e7-9fdd-4463-9964-4bd4809fe0dd
Modified: 2023-08-12 17:23 UTC (History)
19 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

Attachments (Terms of Use)
Output of `journalctl -b --no-hostname -k > dmesg.txt` command (149.50 KB, text/plain)
2023-07-29 15:47 UTC, bc5548e7-9fdd-4463-9964-4bd4809fe0dd 		no flags Details
Output of `journalctl -b --no-hostname -k > dmesg.txt` command after plugging screen in and out (114.08 KB, text/plain)
2023-08-12 13:25 UTC, Stephan Kusch 		no flags Details
View All

Description bc5548e7-9fdd-4463-9964-4bd4809fe0dd 2023-07-29 15:45:52 UTC 
I have external monitor connected via display port to dell WD19TB dock station. After upgrading kernel to 6.4.4 it stays blank after boot. Everything works fine if I select kernel 6.3.12 during boot.

Reproducible: Always

Steps to Reproduce:
1. boot kernel 6.4.4
2. there is no step 2

Actual Results:  
external monitor stays blank

Expected Results:  
external monitor should work
Comment 1 bc5548e7-9fdd-4463-9964-4bd4809fe0dd 2023-07-29 15:47:03 UTC 
Created attachment 1980607 [details]
Output of `journalctl -b --no-hostname -k > dmesg.txt` command
Comment 2 Stephan Kusch 2023-08-12 13:22:29 UTC 
I see a similar or the same issue. Laptop sits on a Lenovo ThinkPad Pro Dock 135W, external monitor is connected with DP. Since kernel 6.4 the external monitor instantly goes to sleep after GRUB, but is still available from terminal or Gnome settings (but still sleeping). Unluckily when trying to change the primary monitor in Gnome settings the internal screen goes blank while the external monitor stays blank either.
Comment 3 Stephan Kusch 2023-08-12 13:25:04 UTC 
Created attachment 1983142 [details]
Output of `journalctl -b --no-hostname -k > dmesg.txt` command after plugging screen in and out
Comment 4 bc5548e7-9fdd-4463-9964-4bd4809fe0dd 2023-08-12 17:23:42 UTC 
Yes, sounds like exact same issue. Looks like we are both running amd vega gpu.
Note You need to log in before you can comment on or make changes to this bug.