Workaround typed into a terminal: xhost +si:localuser:root then 'sudo synaptic' works as usual
** Description changed: With the today packages upgrade, switching from X11 to wayland, synaptic refuse to load/open: from the icon into the dash-to-dock, nothing happen from the terminal: sudo synaptic - [sudo] password for oem: + [sudo] password for oem: Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect: Connection refused (synaptic:2154): Gtk-WARNING **: cannot open display: :0 Previous days already have switching some packages to wayland, but synaptic was still working. Its only with the today upgrades, after a cold reboot, that synaptic gui is broken. + + Today possibly sources problem: + + Unpacking console-setup-linux (1.142ubuntu7) over (1.142ubuntu5) ... + + Unpacking console-setup (1.142ubuntu7) over (1.142ubuntu5) ... + + Unpacking keyboard-configuration (1.142ubuntu7) over (1.142ubuntu5) ... + + Unpacking gnome-session-bin (3.24.1-0ubuntu22) over (3.24.1-0ubuntu21) + ... + + Unpacking gdm3 (3.25.90.1-0ubuntu2) over (3.25.90.1-0ubuntu1) ... + + Unpacking libgdm1 (3.25.90.1-0ubuntu2) over (3.25.90.1-0ubuntu1) ... + + Unpacking gir1.2-gdm-1.0 (3.25.90.1-0ubuntu2) over (3.25.90.1-0ubuntu1) + ... + + Unpacking ubuntu-session (3.24.1-0ubuntu22) over (3.24.1-0ubuntu21) ... + + Unpacking gnome-session (3.24.1-0ubuntu22) over (3.24.1-0ubuntu21) ... + ... + Unpacking gnome-session-common (3.24.1-0ubuntu22) over (3.24.1-0ubuntu21) ... + Setting up keyboard-configuration (1.142ubuntu7) ... ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: synaptic 0.84.2 ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8 Uname: Linux 4.12.0-12-generic x86_64 ApportVersion: 2.20.6-0ubuntu6 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Aug 21 16:21:47 2017 EcryptfsInUse: Yes SourcePackage: synaptic UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1712089 Title: Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect: Connection refused To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/synaptic/+bug/1712089/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs