oh ok, not a bug then but rather a known gtk limitation, their scaling factor is an int...
** Changed in: gtk+3.0 (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1546756 Title: scale factor is broken Status in gtk+3.0 package in Ubuntu: Invalid Bug description: The scale factor is broken, apparently only the text is scaling and not the widgets. On my 1080p X1 Carbon, all the UI widgets look very small, please see attached samples. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: libgtk-3-0 3.10.8-0ubuntu1.6 ProcVersionSignature: Ubuntu 4.2.0-28.33~14.04.1-generic 4.2.8-ckt3 Uname: Linux 4.2.0-28-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 CurrentDesktop: Unity Date: Thu Feb 18 02:05:16 2016 InstallationDate: Installed on 2016-02-11 (6 days ago) InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Beta amd64 (20160211) SourcePackage: gtk+3.0 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1546756/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp