[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

Upgrade to 5.4.0-18-generic fixed this for me. -- 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

[Bug 1656830] Re: Ubuntu MATE 17.04: No DNS resolution caused by systemd-resolved

At least here it's because systemd-resolved insists on doing DNSSEC validation: ~$ sudo journalctl -u systemd-resolved | tail -5 Mar 27 13:30:55 ubuntu systemd-resolved[1083]: DNSSEC validation failed for question ubuntu.pool.ntp.org IN SOA: no-signature Mar 27 13:30:55 ubuntu systemd-resolved[10