This seems to be a bigger bug and applies to software-properties-qt and perhaps pkexec. As it turns out, one cannot launch "sofware-properties- qt" from within plasma-discover either. Even though it calls pkexec to launch it, it fails every time even if the user is a system admin.
** Changed in: ubuntustudio-default-settings (Ubuntu Jammy) Status: Fix Released => In Progress ** Summary changed: - Driver manager KCM can no longer launch + software-properties-qt can no longer launch ** Summary changed: - software-properties-qt can no longer launch + software-properties-qt can no longer launch when called by pkexec ** Also affects: software-properties (Ubuntu) Importance: Undecided Status: New ** Also affects: policykit-1 (Ubuntu) Importance: Undecided Status: New ** Changed in: policykit-1 (Ubuntu Jammy) Status: New => Confirmed ** Changed in: software-properties (Ubuntu Jammy) Status: New => Confirmed ** Changed in: policykit-1 (Ubuntu Jammy) Importance: Undecided => Critical ** Changed in: software-properties (Ubuntu Jammy) Importance: Undecided => Critical ** Changed in: ubuntustudio-default-settings (Ubuntu Jammy) Importance: Critical => High ** Changed in: kubuntu-settings (Ubuntu Jammy) Importance: Undecided => High ** Description changed: + See description below. As the driver manager is done inside software- + properties-qt, it's basically the same bug, but now it's affected by + something we can't exactly get into the mechanism of: plasma-discover's + "Software Sources" link. + + + Earlier description: + The driver manager for both Ubuntu Studio and Kubuntu can no longer launch due to some updated security measures in PolicyKit. The original behavior was that systemsettings would open /usr/bin/ubuntustudio-driver-manager (or /usr/bin/kubuntu-driver-manger) via pkexec, which would then open software-settings-qt. Unfortunately, the new behavior does not act correctly to pkexec and pkexec does not see the user as available in the sudoers file. The only way around this was to pass "export DISPLAY=:0" inside the appropriate driver manager executable with the command "sudo software- properties-qt". The KCM itself needs to execute the driver-manager via xterm, which then prompts for a password. It's ugly, but it works. I will attach a debdiff for the kubuntu-settings package. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: ubuntustudio-default-settings 22.04.19 [modified: usr/share/sddm/themes/ubuntustudio/theme.conf] ProcVersionSignature: Ubuntu 5.15.0-22.22-lowlatency 5.15.19 Uname: Linux 5.15.0-22-lowlatency x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu79 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Thu Mar 17 12:19:44 2022 InstallationDate: Installed on 2021-03-20 (361 days ago) InstallationMedia: Ubuntu-Studio 21.04 "Hirsute Hippo" - Alpha amd64 (20210320) PackageArchitecture: all SourcePackage: ubuntustudio-default-settings UpgradeStatus: Upgraded to jammy on 2021-11-07 (130 days ago) modified.conffile..etc.skel..local.share.konsole.Profile: [deleted] -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-settings in Ubuntu. https://bugs.launchpad.net/bugs/1965439 Title: software-properties-qt can no longer launch when called by pkexec To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-settings/+bug/1965439/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs