This usually happens for me when I login and the X session is started, which sends me back to the login. I have made the observation that this doesn't happen if a stable network connection is already present.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1673649 Title: Xorg crashed with SIGABRT in OsAbort() Status in xorg-server package in Ubuntu: Confirmed Bug description: Crashed on connecting with VNC Client. Using vnc4server. ProblemType: Crash DistroRelease: Ubuntu 17.04 Package: xserver-xorg-core 2:1.18.4-1ubuntu9 ProcVersionSignature: Ubuntu 4.10.0-13.15-generic 4.10.1 Uname: Linux 4.10.0-13-generic x86_64 ApportVersion: 2.20.4-0ubuntu2 Architecture: amd64 CrashCounter: 1 Date: Fri Mar 17 12:28:21 2017 ExecutablePath: /usr/lib/xorg/Xorg InstallationDate: Installed on 2017-02-06 (38 days ago) InstallationMedia: Ubuntu-MATE 17.04 "Zesty Zapus" - Alpha amd64 (20170125) ProcCmdline: /usr/lib/xorg/Xorg -core :1 -seat seat0 -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch ProcEnviron: PATH=(custom, no user) Signal: 6 SourcePackage: xorg-server StacktraceTop: OsAbort () ?? () FatalError () xf86PostProbe () InitOutput () Title: Xorg crashed with SIGABRT in OsAbort() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1673649/+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