[HP Victus 15-fb0xxx] Can't change screen brightness

[Tomasz Woźniak]

HP Victus with Radeon 6500 graphics, Ubuntu 22.04.3. When pressing functions key, a brightness popup appears, but the brightness is still maximum. I tried to update GRUB with adding "acpi_osi=Linux acpi_backlight=vendor" but after that even the popup doesn't show by pressing functions key, nothing really happens.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 6.5.0-14.14~22.04.1-generic 6.5.3
Uname: Linux 6.5.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
BootLog: Error: [Errno 13] Brak dostępu: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Jan 20 13:35:33 2024
DistUpgraded: Fresh install
DistroCodename: jammy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Subsystem: Hewlett-Packard Company Device [103c:8a3f]
 Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [1002:1638] (rev c6) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Cezanne [103c:8a3f]
InstallationDate: Installed on 2024-01-20 (0 days ago)
InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
MachineType: HP Victus by HP Gaming Laptop 15-fb0xxx
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.5.0-14-generic root=UUID=82abbfb4-55a4-49f1-aaf8-f00a4d56e35f ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/11/2023
dmi.bios.release: 15.18
dmi.bios.vendor: AMI
dmi.bios.version: F.18
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 8A3F
dmi.board.vendor: HP
dmi.board.version: 35.44
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 35.44
dmi.modalias: dmi:bvnAMI:bvrF.18:bd08/11/2023:br15.18:efr35.44:svnHP:pnVictusbyHPGamingLaptop15-fb0xxx:pvr:rvnHP:rn8A3F:rvr35.44:cvnHP:ct10:cvrChassisVersion:sku9Q377EA#AKD:
dmi.product.family: 103C_5335M7 HP VICTUS
dmi.product.name: Victus by HP Gaming Laptop 15-fb0xxx
dmi.product.sku: 9Q377EA#AKD
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 23.0.4-0ubuntu1~22.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1