Public bug reported:
Ubuntu 26.04 LTS, Lenovo laptop, Wayland/GNOME.
Hardware: AMD Krackan Radeon 840M/860M + NVIDIA RTX 5070 Max-Q.
NVIDIA driver: 580.173.02 open.
Kernel 7.0.0-29 was installed by unattended upgrades on 2026-08-06.
With 7.0.0-29, the external HDMI monitor is not detected and nvidia-smi fails.
With 7.0.0-28, NVIDIA loads and the monitor works normally.
Expected: external monitor detected.
Actual: only the internal display is available.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-29-generic 7.0.0-29.29
ProcVersionSignature: Ubuntu 7.0.0-29.29-generic 7.0.12
Uname: Linux 7.0.0-29-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 7 07:49:16 2026
InstallationDate: Installed on 2026-07-09 (29 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 83F1
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-29-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/20/2025
dmi.bios.release: 1.28
dmi.bios.vendor: LENOVO
dmi.bios.version: RYCN28WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76574 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Legion 5 15AKP10
dmi.ec.firmware.release: 1.27
dmi.modalias:
dmi:bvnLENOVO:bvrRYCN28WW:bd11/20/2025:br1.28:efr1.27:svnLENOVO:pn83F1:pvrLegion515AKP10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76574WIN:cvnLENOVO:ct10:cvrLegion515AKP10:skuLENOVO_MT_83F1_BU_idea_FM_Legion515AKP10:pfaLegion515AKP10:
dmi.product.family: Legion 5 15AKP10
dmi.product.name: 83F1
dmi.product.sku: LENOVO_MT_83F1_BU_idea_FM_Legion 5 15AKP10
dmi.product.version: Legion 5 15AKP10
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2163010
Title:
[regression] External monitor missing on kernel 7.0.0-29, works on
7.0.0-28
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