Public bug reported:
I don't know much about the essue but my brighness control is not
working. slider works but no effect on the screen. I have a lenovo p51s
laptop.
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
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: shubham-mamodiya 4744 F.... wireplumber
/dev/snd/seq: shubham-mamodiya 4731 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 5 21:46:50 2026
InstallationDate: Installed on 2026-07-06 (30 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 20JY0009US
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-ghostty
ProcFB: 0 i915drmfb
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: 07/14/2023
dmi.bios.release: 1.54
dmi.bios.vendor: LENOVO
dmi.bios.version: N1VET64W (1.54 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20JY0009US
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.18
dmi.modalias:
dmi:bvnLENOVO:bvrN1VET64W(1.54):bd07/14/2023:br1.54:efr1.18:svnLENOVO:pn20JY0009US:pvrThinkPadP51sW10DG:rvnLENOVO:rn20JY0009US:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20JY_BU_Think_FM_ThinkPadP51sW10DG:pfaThinkPadP51sW10DG:
dmi.product.family: ThinkPad P51s W10DG
dmi.product.name: 20JY0009US
dmi.product.sku: LENOVO_MT_20JY_BU_Think_FM_ThinkPad P51s W10DG
dmi.product.version: ThinkPad P51s W10DG
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute
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https://bugs.launchpad.net/bugs/2162919
Title:
after updating to the latest kernel my brightness controling is not
working. I run the bug report commant to se if does something I think
it might be related to that.
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