Also affected by this bug. As described, screen brightness did not respond to hotkeys or brightness slider, and screen stayed dark after returning from sleep mode.
ThinkPad T480 i5-8350U running Kubuntu 26.04 LTS on a fresh install, kernel version 7.0.0-29-generic 64-bit, Intel UHD Graphics 620 integrated card with no discrete graphics. As described by Tyson-lambert (#7), appending "i915.enable_dpcd_backlight=0" to boot parameters fixed this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161359 Title: linux-modules-7.0.0-28-generic breaks backlight control on some laptops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161359/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
