Thank you Cas. Let me answer to your suggestions. Check all updates are installed? Try proposed updates? I always install all updates.
Is this with mouse or trackpad? I only use the trackpad. Have you checked what gsettings is reporting? gsettings get org.gnome.desktop.peripherals.mouse left-handed true Perhaps try a booting with a livecd ubuntu and test mouse there. I don't have a CD with Ubuntu 18.04. I started using Ubuntu with version 12.04 and I have updated it to versions 14.04 and 16.04. The left-handed mode always worked fine. A couple of weeks ago, I was offered to install version 18.04. The bug started after the installation of this new version. I must say it is very annoying. -- 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/1758306 Title: Cannot switch mouse primary button to Right (left-handed) in Settings Status in gnome-control-center package in Ubuntu: Fix Released Status in xserver-xorg-input-libinput package in Ubuntu: Invalid Bug description: Prior to yesterday's (March 22/18) Bionic update, I had my mouse configured for left handed use. That is the mouse primary button being switched to the right. GCC doesn't seem to work for this now. I don't know if it's related to evdev or what. Held back reporting this in case it was fixed by changes overnight. Updated this morning and problem persists. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-control-center 1:3.28.0-0ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-36201803011620.0+mediatree+hauppauge-generic 4.13.13 Uname: Linux 4.13.0-36201803011620-generic x86_64 ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 CurrentDesktop: GNOME Date: Fri Mar 23 07:07:02 2018 InstallationDate: Installed on 2018-01-19 (62 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170920) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1758306/+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