Reverting to both 100% and 200% works fine, without issues. g-c-c now requires a further "apply" to turn it off, and mutter reacts properly when setting it back to both 200% and 100%.
marco-ThinkPad-X1-Carbon-7th ~ 13:22:00 ❯ apt-cache policy libmutter-6-0 libmutter-6-0: Installed: 3.36.4-0ubuntu0.20.04.2 Candidate: 3.36.4-0ubuntu0.20.04.2 Version table: *** 3.36.4-0ubuntu0.20.04.2 500 500 http://it.archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages 100 /var/lib/dpkg/status 3.36.3-0ubuntu0.20.04.1 500 500 http://it.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 3.36.1-3ubuntu3 500 500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages marco-ThinkPad-X1-Carbon-7th ~ 13:22:02 ❯ apt-cache policy gnome-control-center gnome-control-center: Installed: 1:3.36.4-0ubuntu1 Candidate: 1:3.36.4-0ubuntu1 Version table: *** 1:3.36.4-0ubuntu1 500 500 http://it.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 100 /var/lib/dpkg/status 1:3.36.1-1ubuntu5 500 500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages ** Tags removed: verification-needed verification-needed-focal ** Tags added: verification-done verification-done-focal -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1876894 Title: Scaling is not reverted properly (appears shrunk) when disabling fractional scaling Status in gnome-control-center package in Ubuntu: Fix Released Status in mutter package in Ubuntu: Fix Released Status in gnome-control-center source package in Focal: Fix Released Status in mutter source package in Focal: Fix Committed Bug description: * Impact Scaling is not reverted properly (appears shrunk) when disabling fractional scaling * Test Case Do this in an Ubuntu/Xorg session: 0. Be on a "clean" system wrt. fractional scaling, i.e. disabled & scaling at 100% 1. Open gnome-control-center → displays 2. Turn on fractional scaling 3. Select 125% 4. Press apply (the scaling should correctly change now) 5. Turn off fractional scaling by changing the toggle Now everything is shrunk - it's not been returned to 100% properly. See the attached screenshot where the text is tiny instead of regular 100% size. If you do this instead of step 5: 5. Select 100% scaling 7. Press apply 8. Turn off fractional scaling by changing the toggle Then everything returns to the normal size. Repeat the same selecting 200% at 5., (or 100% if 200% was your default) and ensure it's applied. I'm on nvidia(-440), but Séb said that he saw this on his Intel machine too. * Regression potential Verify that scaling changes are correctly applied on different setup ProblemType: BugDistroRelease: Ubuntu 20.04 Package: mutter 3.36.1-3ubuntu3 ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30 Uname: Linux 5.4.0-28-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: GNOME Date: Tue May 5 10:57:40 2020 InstallationDate: Installed on 2012-10-07 (2766 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20121007)SourcePackage: mutter UpgradeStatus: Upgraded to focal on 2020-01-16 (109 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1876894/+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