Looks like I was wrong! GNOME Screenshot worked fine. Attached are both the full-resolution unedited screenshot, and a screenshot with several of the exact same icons overlaid pixel-doubled properly as an example of how it should look.
** Attachment added: "Unedited Settings Screenshot" https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1638417/+attachment/4771322/+files/settings.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1638417 Title: Icons fuzzy on HiDPI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1638417/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs