Public bug reported:
After upgrading from kernel 6.14.0-29-generic to 6.14.0-32-generic on
Ubuntu 24.04, my USB-C external monitor is no longer detected. The
display still receives power over USB-C, but it does not appear in
xrandr or display any output. The display is not detected by the system
at all.
When I boot back into kernel 6.14.0-29, the external display works
normally again.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.14.0-32-generic 6.14.0-32.32~24.04.1
ProcVersionSignature: Ubuntu 6.14.0-32.32~24.04.1-generic 6.14.11
Uname: Linux 6.14.0-32-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: enarde 2058 F.... wireplumber
/dev/snd/controlC0: enarde 2058 F.... wireplumber
/dev/snd/seq: enarde 2054 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 30 13:15:31 2025
InstallationDate: Installed on 2025-08-31 (30 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
MachineType: LENOVO 83GS
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-32-generic
root=UUID=393bc376-e413-4b9c-9839-dbb3723db5ac ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.14.0-32-generic N/A
linux-backports-modules-6.14.0-32-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.17
SourcePackage: linux-hwe-6.14
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/10/2024
dmi.bios.release: 1.34
dmi.bios.vendor: LENOVO
dmi.bios.version: NECN34WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76463 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: LOQ 15IAX9
dmi.ec.firmware.release: 1.34
dmi.modalias:
dmi:bvnLENOVO:bvrNECN34WW:bd04/10/2024:br1.34:efr1.34:svnLENOVO:pn83GS:pvrLOQ15IAX9:rvnLENOVO:rnLNVNB161216:rvrSDK0T76463WIN:cvnLENOVO:ct10:cvrLOQ15IAX9:skuLENOVO_MT_83GS_BU_idea_FM_LOQ15IAX9:
dmi.product.family: LOQ 15IAX9
dmi.product.name: 83GS
dmi.product.sku: LENOVO_MT_83GS_BU_idea_FM_LOQ 15IAX9
dmi.product.version: LOQ 15IAX9
dmi.sys.vendor: LENOVO
** Affects: linux-hwe-6.14 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2126060
Title:
6.14.0-32 - USB-C display stops working after upgrading kernel
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