Thank you for the bug report.
Could you try this solution from the forums?
https://askubuntu.com/a/1315513
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: xorg (Ubuntu)
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https://bugs.launchpad.net/bugs/2090798
Title:
Display dimming
Status in linux package in Ubuntu:
New
Bug description:
On a Lenovo B50 there are two problems:
1. F11 and F12 are meant to lower the display bightness and brighten
it respectively. They work the wrong way round. F11 makes the screen
brighter, F12 makes it darker.
2. When the display would naturally dim after some time, instead it
brightens. Pushing a key 'wakes' the machine and the display dims
again to the previously selected brightness.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-49.49-generic 6.8.12
Uname: Linux 6.8.0-49-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Dec 1 22:21:13 2024
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display
[8086:0f31] (rev 0e) (prog-if 00 [VGA controller])
Subsystem: Lenovo Atom Processor Z36xxx/Z37xxx Series Graphics & Display
[17aa:3986]
InstallationDate: Installed on 2024-12-01 (0 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 003: ID 13d3:5727 IMC Networks Lenovo EasyCamera
Bus 001 Device 008: ID 0cf3:3004 Qualcomm Atheros Communications AR3012
Bluetooth 4.0
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
MachineType: LENOVO 80ES
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-49-generic
root=UUID=b846d8e3-1041-4b23-8faf-9a1f7c676f60 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/13/2014
dmi.bios.release: 1.28
dmi.bios.vendor: LENOVO
dmi.bios.version: 9CCN28WW(V2.06)
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Lenovo B50-30
dmi.board.vendor: LENOVO
dmi.board.version: SDK0F82993WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo B50-30
dmi.ec.firmware.release: 1.28
dmi.modalias:
dmi:bvnLENOVO:bvr9CCN28WW(V2.06):bd10/13/2014:br1.28:efr1.28:svnLENOVO:pn80ES:pvrLenovoB50-30:rvnLENOVO:rnLenovoB50-30:rvrSDK0F82993WIN:cvnLENOVO:ct10:cvrLenovoB50-30:skuLENOVO_BI_IDEAPAD9C_BU_idea_FM_LenovoB50-30:
dmi.product.family: IDEAPAD
dmi.product.name: 80ES
dmi.product.sku: LENOVO_BI_IDEAPAD9C_BU_idea_FM_Lenovo B50-30
dmi.product.version: Lenovo B50-30
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.9-0ubuntu0.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.17-2build1
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