If you install and boot with 6.8.0-generic kernel, does this issue still happen?
** Changed in: linux-signed-hwe-6.11 (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-6.11 in Ubuntu. https://bugs.launchpad.net/bugs/2111484 Title: HP Probook 445 g11 AMD Ryzen 7 7735U with Radeon Graphics Backlight not controllable Status in linux-signed-hwe-6.11 package in Ubuntu: Triaged Bug description: I already tried the following grub configs: acpi_backlight=vendor acpi_backlight=native acpi_backlight=amdgpu amdgpu.backlight=0 nomodeset lsb_release -rd: No LSB modules are available. Description: Ubuntu 24.04.2 LTS Release: 24.04 I expect to be able to control the backlight. Also, waking up after hibernation, the pc seems to be working, but nothing is displayed (probably also linked to the backlight problem). I cannot attach any files described in the wiki article as this form only allows one attachment but i will try to add them after posting this. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.11.0-26-generic 6.11.0-26.26~24.04.1 ProcVersionSignature: Ubuntu 6.11.0-26.26~24.04.1-generic 6.11.11 Uname: Linux 6.11.0-26-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.3 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu May 22 11:29:46 2025 InstallationDate: Installed on 2025-05-21 (0 days ago) InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215) ProcEnviron: LANG=de_DE.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: linux-signed-hwe-6.11 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.11/+bug/2111484/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp