No external USB-C monitor detection on my Thinkpad T14s AMD Gen3 powered by Fedora 38, maybe after firmware updates

stephaneklein · August 21, 2023, 9:07pm

Hello,

USB-C external monitor detection no longer works on my Fedora 38.

At the end of July, detection was working well.

Here’s all the information:

Laptop : Thinkpad T14s AMD Gen3
Monitors tested:
- Dell 24 Ultra HD 4K : P2415Q
- 23.8" Dell P2421DC
Connection : USB-C to DisplayPort
Kernel : Linux t14s 6.4.11-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Aug 16 17:42:12 UTC 2023 x86_64 GNU/Linux
lshw output: lshw.txt · GitHub
fwupdmgr get-history output: fwupdmgr get-history.txt · GitHub
Desktop Gnome : 44
Display manager : Wayland, version 1.22

I have a feeling that the problem occurred after the firmware Lenovo (ThinkPad) ThinkPad X13/T14s Gen 3 AMD was installed, I have upgraded from version 0.1.25 to 0.1.31

These two external monitors are detected when I connect the Thinkpad via USB-C to HDMI.

Question: have you had this problem in the last 3 weeks following a firmware or kernel update?

Best regards,
Stéphane

stephaneklein · September 1, 2023, 10:38am

Problem corrected this morning.

This may be due to the upgrade of Kernel 6.4.11 to 6.4.12 (changelog).