Kernel cannot detect HDMI connection
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-signed-hwe-6.2 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
Hie,
I have the same problem than
https:/
with my computer HP 17-cn2119 under Kubuntu 22.04. I tried also Kubuntu 23.04 and 23.10, xorg and wayland, same problem. I also tested openSuse 15.5 and there was the same issue.
Screen and HDMI cable worked with the previous computer HP 17-p128nf, and work actually on Windows 11 (dualboot).
Seems to be a Linux problem.
Thank you for your help
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-
ProcVersionSign
Uname: Linux 6.2.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: KDE
Date: Sun Dec 3 15:09:53 2023
InstallationDate: Installed on 2023-12-03 (0 days ago)
InstallationMedia: Kubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.1)
SourcePackage: linux-signed-
UpgradeStatus: No upgrade log present (probably fresh install)
I have been helping troubleshoot the same issue where HDMI stopped working on a Ubuntu 22.04 that had just been upgraded (also HP hardware). You beat me to reporting it.
The issue was finally determined to be caused by a kernel version upgrade. Booting from the previous kernel (as selected on GRUB) the problem is gone.
guillaume2a, try installing linux-image- 6.2.0-36- generic and *booting* that kernel version (it will probably not be chosen as default). I expect your HDMI screen will work with that one.
TL;DR: linux-image- 6.2.0-36- generic works, linux-image- 6.2.0-37- generic fails