Public bug reported: I did get this error wile changing the setings in mate tweak!
ProblemType: Crash DistroRelease: Ubuntu 16.04 Package: mate-panel 1.12.2-1 ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4 Uname: Linux 4.4.0-12-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CurrentDesktop: MATE Date: Sun Mar 13 19:10:30 2016 ExecutablePath: /usr/lib/mate-panel/clock-applet InstallationDate: Installed on 2016-03-13 (0 days ago) InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160313) ProcCmdline: /usr/lib/mate-panel/clock-applet SegvAnalysis: Segfault happened at: 0x7f392ad8d2cb <g_type_check_instance_is_a+59>: testb $0x4,0x16(%rdx) PC (0x7f392ad8d2cb) ok source "$0x4" ok destination "0x16(%rdx)" (0x00007382) not located in a known VMA region (needed writable region)! SegvReason: writing NULL VMA Signal: 11 SourcePackage: mate-panel StacktraceTop: g_type_check_instance_is_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 gtk_widget_queue_resize () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 ?? () g_cclosure_marshal_VOID__STRINGv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 Title: clock-applet crashed with SIGSEGV in g_type_check_instance_is_a() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo ** Affects: ubuntu-mate Importance: Undecided Status: New ** Affects: mate-panel (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-crash need-amd64-retrace xenial ** Information type changed from Private to Public ** Also affects: ubuntu-mate Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1556640 Title: clock-applet crashed with SIGSEGV in g_type_check_instance_is_a() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1556640/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs