Public bug reported:
Kernel 6.8.0-50 and Kernel 6.8.0-51 both create a second display device
on my intel laptop (12th gen Thinkpad X1C with meteorlake ultra7 155U,
integrated graphics). This phantom display is using the simpledrm
driver. This phantom display prevents the laptop from sleeping when the
lid is closed. Rolling back to 6.8.0.39 solves the problem.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-51-generic 6.8.0-51.52
ProcVersionSignature: Ubuntu 6.8.0-51.52-generic 6.8.12
Uname: Linux 6.8.0-51-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/seq: mikey 3842 F.... pipewire
/dev/snd/controlC0: mikey 3842 F.... pipewire
mikey 3845 F.... wireplumber
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 20 19:04:13 2024
InstallationDate: Installed on 2024-05-13 (221 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
MachineType: LENOVO 21KCCTO1WW
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
ProcFB:
0 simpledrmdrmfb
1 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-51-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.8.0-51-generic N/A
linux-backports-modules-6.8.0-51-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.6
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/04/2024
dmi.bios.release: 1.36
dmi.bios.vendor: LENOVO
dmi.bios.version: N3YET71W (1.36 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21KCCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76530 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.24
dmi.modalias:
dmi:bvnLENOVO:bvrN3YET71W(1.36):bd09/04/2024:br1.36:efr1.24:svnLENOVO:pn21KCCTO1WW:pvrThinkPadX1CarbonGen12:rvnLENOVO:rn21KCCTO1WW:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21KC_BU_Think_FM_ThinkPadX1CarbonGen12:
dmi.product.family: ThinkPad X1 Carbon Gen 12
dmi.product.name: 21KCCTO1WW
dmi.product.sku: LENOVO_MT_21KC_BU_Think_FM_ThinkPad X1 Carbon Gen 12
dmi.product.version: ThinkPad X1 Carbon Gen 12
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
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https://bugs.launchpad.net/bugs/2092322
Title:
Extra Display - 35 inch Unknown Display
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