Also affects Dell 7490 with identical reported behavior. ### Hardware
* Distro: Ubuntu 26.04 LTS (Resolute Racoon) * Laptop: Dell Latitude 7490 * BIOS: 1.41.0 * GPU: Intel Kaby Lake-R GT2 [UHD Graphics 620] (i915) * Internal display: AU Optronics AU0223D 1920x1080 --- ### Kernel versions Working: ``` 7.0.0-27-generic ``` Broken: ``` 7.0.0-28-generic ``` My full brightness values are different for the working (7.0.0-27) kernel: ``` $ cat /sys/class/backlight/intel_backlight/max_brightness 7500 $ cat /sys/class/backlight/intel_backlight/brightness 7500 $ cat /sys/class/backlight/intel_backlight/actual_brightness 7500 ``` Happy to add additional metadata if requested. This is also reported on LinuxMint forums here: https://forums.linuxmint.com/viewtopic.php?t=471670 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161102 Title: Regression: Intel TigerLake eDP backlight broken after Linux 7.0.0-27 (Dell Latitude 5420) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161102/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
