I see the same on a Thinkpad X1 Carbon 5th with kernel 7.0.0-28-generic. Max brightness is set to 1023, and changing the brightness setting of the lcd doesn't actually change anything, just the numbers go down and up, but no visible change on the screen.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161797 Title: [regression 7.0.0-27 -> 7.0.0-28] i915 derives wrong backlight PWM period on Kaby Lake-R (max_brightness 1023 instead of 7500), panel ignores all brightness changes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161797/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
