the solution is to edit files in `/etc/default/grub.d/` instead of editing the file `/etc/default/grub` .
Dunno why they changed it, there's no mention of it in the docs. ** Changed in: linux-signed (Ubuntu) Status: New => Fix Released ** Changed in: linux-signed (Ubuntu) Assignee: (unassigned) => Alberto (muaddibber) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771859 Title: Cgroup swap support not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1771859/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs