Found work around for -28: add "i915.enable_dpcd_backlight=0" to boot parameters
steps, as root or sudo edit /etc/default/grub adding the parameter to the end of this line, like so: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_dpcd_backlight=0" run update-grub -- 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
