While I may have screwed up something , I think I'm running 7.0.0-31-generic and there is no difference, still stuck on max brightness:
$ hostnamectl Static hostname: Cirrus Icon name: computer-laptop Chassis: laptop 💻 .... Operating System: Ubuntu 26.04 LTS Kernel: Linux 7.0.0-31-generic Architecture: x86-64 Hardware Vendor: LG Electronics Hardware Model: 16Z90SP-A.ADB8U1 Hardware SKU: EVO Hardware Version: 0.1 Firmware Version: M2ZI0450 X64 Firmware Date: Mon 2024-06-10 Firmware Age: 2y 2mont After installing 7.0.0-31-generic - it kept booting the 7.0.0-2018-nvidia-bos kernel. I removed it anyway with apt and killed my machine. editing the grub boot parameters by hand seems to have worked, but I trust nothing now. audio down/up keys still work fine. On 8/21/26 14:04, Pavol wrote: > To fellow Ubuntu/Kubuntu users affected by this issue: > > As mentioned above, this bug is resolved starting with kernel version > linux-image-7.0.0-31-generic. > > This fix is currently available in the `-proposed` repository for > testing. Testing this pre-release build and providing your feedback here > is very important for Canonical and Ubuntu developers—it helps them > verify that the patch works reliably across different hardware > configurations before releasing it to everyone in standard updates (and > passing feedback upstream to the Linux kernel). > > If you are a regular user and run into any difficulties during the > process, you can easily use modern AI tools (such as Gemini with > reasoning enabled). If something goes wrong, simply copy the terminal > output into the AI to analyze and guide you through the solution. > > Here is a step-by-step guide to safely install ONLY the proposed kernel > without upgrading the rest of your system: > > --- > > ### Step 0: Check your system info (to include in your feedback comment) > Run: > hostnamectl > > --- > > ### Step 1: Enable the `-proposed` repository > Open your terminal (e.g., Konsole) and run: > > SUITE=$(lsb_release -cs) > sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu/ > ${SUITE}-proposed main restricted" > sudo apt update > > --- > > ### Step 2: Install ONLY the new kernel from `-proposed` > (Do NOT run `sudo apt upgrade`, as that would pull other untested system > packages. Install only the kernel): > > sudo apt install -t ${SUITE}-proposed linux-image-generic linux-headers- > generic > > (APT will automatically download the `...-31-generic` kernel image and > all required modules). > > --- > > ### Step 3: Safely disable the `-proposed` repository > Once the installation finishes, remove the proposed archive to keep your > system stable: > > sudo add-apt-repository -r -y "deb http://archive.ubuntu.com/ubuntu/ > ${SUITE}-proposed main restricted" > sudo apt update > > --- > > ### Step 4: Reboot and verify > 1. Reboot your machine: > sudo reboot > > 2. After booting, verify that you are running kernel version 31: > uname -r > > --- > > If your brightness controls and suspend/resume are now working properly, > please leave a comment with your hardware model (from `hostnamectl`) to > confirm verification! > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161309 Title: Backlight regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161309/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
