Please use "i915.enable_dpcd_backlight=0" for WA, or use 5.13.0-1012-oem kernel instead.
I will try to fix it in hirsute kernel. ** Changed in: linux (Ubuntu) Assignee: (unassigned) => AaronMa (mapengyu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1944435 Title: Backlight on P17 Gen 1 not working Nvidia 470 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1944435/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs