I rebooted into Eoan's 5.3.0-29.31 kernel, with Focal's userspace, and verified that the screen brightness is still adjustable under that kernel. Additionally, it is worth noting that I saw the same "hp_wmi: Unknown event_id" warnings mentioned in comment 2 so they probably don't have anything to do with this bug.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861521 Title: [FOCAL][REGRESSION] HP EliteBook 840 G5 screen brightness cannot be controlled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-5.4/+bug/1861521/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
