Here is a new test kernel which not only revert the quirk, but introduce a new way to quirk the panels which support DPCD backlight https://people.canonical.com/~acelan/bugs/lp1861521/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1858844 Title: [Dell XPS 15 9575] Screen brightness stopped working with linux- image-5.4.0-9-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1858844/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
