Public bug reported:
Ubuntu 26.04.1 LTS
Kernel 7.0.0-31-generic
HP ZBook Studio 15.6 inch G8 Mobile Workstation PC
System cannot detect monitor connected via hdmi to mini display port
adapter after automatic update to kernel version 7.0.0-31-generic. If
7.0.0-30-generic is manually picked via GRUB then everything works well
7.0.0-31-generic:
$ xrandr --listmonitors
Monitors: 1
0: +*eDP-1 1920/340x1080/190+0+0 eDP-1
7.0.0-30-generic:
$ xrandr --listmonitors
Monitors: 2
0: +*eDP-1 1920/340x1080/190+0+0 eDP-1
1: +DP-6 1920/480x1080/270+1920+0 DP-6
Actual Results: System cannot detect monitor connected via hdmi to mini display
port adapter
Expected Results: Monitor is successfully detected
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-31-generic 7.0.0-31.31
ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: dynetskov-ajax 5196 F.... pipewire
dynetskov-ajax 5217 F.... wireplumber
/dev/snd/controlC0: dynetskov-ajax 5217 F.... wireplumber
/dev/snd/seq: dynetskov-ajax 5196 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 15 12:11:53 2026
InstallationDate: Installed on 2026-08-01 (45 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: HP HP ZBook Studio 15.6 inch G8 Mobile Workstation PC
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-31-generic
root=UUID=ace75b89-d551-41ec-8d60-fe847db156e3 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: 06/12/2026
dmi.bios.release: 25.0
dmi.bios.vendor: HP
dmi.bios.version: T92 Ver. 01.25.00
dmi.board.name: 8873
dmi.board.vendor: HP
dmi.board.version: KBC Version 53.40.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.ec.firmware.release: 83.64
dmi.modalias:
dmi:bvnHP:bvrT92Ver.01.25.00:bd06/12/2026:br25.0:efr83.64:svnHP:pnHPZBookStudio15.6inchG8MobileWorkstationPC:pvrSBKPFV3:rvnHP:rn8873:rvrKBCVersion53.40.00:cvnHP:ct10:cvr:sku314G8EA#A2Q:pfa103C_5336ANHPZBook:
dmi.product.family: 103C_5336AN HP ZBook
dmi.product.name: HP ZBook Studio 15.6 inch G8 Mobile Workstation PC
dmi.product.sku: 314G8EA#A2Q
dmi.product.version: SBKPFV3
dmi.sys.vendor: HP
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2167319
Title:
Cannot detect mini display port monitor after upgrading to kernel
7.0.0-31-generic
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