I performed a test with linux-image-5.6.0-1007-oem from focal-proposed. The brightness control works without problem on that version. So the problem seems to be fixed on linux-oem-5.6.
Is the version going to make it to the focal release? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871330 Title: Dell XPS 13 (7390) brightness is not adjustable with recent kernel update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oem-5.4/+bug/1871330/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs