Would it be possible for you to test a comparable mainline kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the v6.14.11 kernel[0] and the 6.15.6 kernel[1] and let me know if the problem happens with those kernels too.
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream' and let us know which one it worked on. [0]: https://kernel.ubuntu.com/mainline/v6.14.11/ [1]: https://kernel.ubuntu.com/mainline/v6.15.6/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2116781 Title: On Ubuntu 25.04, whenever I lock the screen and log back in or suspend and log back in, the screen brightness increases sharply, ignoring previously set brightness levels. Status in linux package in Ubuntu: Triaged Bug description: Steps to reproduce: 1. Set brightness to a comfortable level (e.g., 40) 2. Lock the screen or suspend 3. Login again 4. Brightness jumps to maximum (or a much higher level Expected behavior: Brightness should remain unchanged across lock/unlock cycles. Actual behavior: Brightness increases significantly after login. You can observe the increase in the brightness in the lockscreen when it prompts for the password. More details: ubuntu-25.04 linux-6.14.0-23-generic gnome-48 ProblemType: Bug DistroRelease: Ubuntu 25.04 Package: linux-image-6.14.0-23-generic 6.14.0-23.23 ProcVersionSignature: Ubuntu 6.14.0-23.23-generic 6.14.5 Uname: Linux 6.14.0-23-generic x86_64 ApportVersion: 2.32.0-0ubuntu5.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: shanjiv 3613 F.... pipewire shanjiv 3617 F.... wireplumber /dev/snd/seq: shanjiv 3613 F.... pipewire CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Sat Jul 12 18:35:18 2025 InstallationDate: Installed on 2025-07-09 (3 days ago) InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3) MachineType: LENOVO 83JM ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/usr/bin/zsh TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-23-generic root=UUID=f4d48a9b-2869-4ff6-a423-0a39ab2efbf0 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-6.14.0-23-generic N/A linux-backports-modules-6.14.0-23-generic N/A linux-firmware 20250317.git1d4c88ee-0ubuntu1.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/06/2025 dmi.bios.release: 1.49 dmi.bios.vendor: LENOVO dmi.bios.version: PZCN49WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0T76485 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: IdeaPad Pro 5 16IAH10 dmi.ec.firmware.release: 1.49 dmi.modalias: dmi:bvnLENOVO:bvrPZCN49WW:bd06/06/2025:br1.49:efr1.49:svnLENOVO:pn83JM:pvrIdeaPadPro516IAH10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76485WIN:cvnLENOVO:ct10:cvrIdeaPadPro516IAH10:skuLENOVO_MT_83JM_BU_idea_FM_IdeaPadPro516IAH10: dmi.product.family: IdeaPad Pro 5 16IAH10 dmi.product.name: 83JM dmi.product.sku: LENOVO_MT_83JM_BU_idea_FM_IdeaPad Pro 5 16IAH10 dmi.product.version: IdeaPad Pro 5 16IAH10 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2116781/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
