Problem reproduced with old version: gert@gert-laptop:~$ dpkg -s libmutter-2-0 | grep Version Version: 3.28.3-2~ubuntu18.04.2
Apr 19 14:41:11 gert-laptop gnome-shell[991]: CoglError set over the top of a previous CoglError or uninitialized memory. This indicates a bug in someone's code. You must ensure an error is NULL before it's set. The overwriting error message was: Sliced texture size of 2560 x 1024 not possible with max waste set to -1 Apr 19 14:41:11 gert-laptop org.gnome.Shell.desktop[991]: double free or corruption (fasttop) Apr 19 14:41:11 gert-laptop org.gnome.Shell.desktop[991]: == Stack trace for context 0x1ab5838 == Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: (EE) Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: Fatal server error: Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: (EE) failed to read Wayland events: Broken pipe Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: (EE) Apr 19 14:41:47 gert-laptop gnome-session-binary[983]: WARNING: Application 'org.gnome.Shell.desktop' killed by signal 6 After installation from proposed, the problem was solved: root@gert-laptop:/etc/apt# dpkg -s libmutter-2-0 | grep Version Version: 3.28.3+git20190124-0ubuntu18.04.2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1790525 Title: gnome-shell assert failure: double free or corruption (fasttop) in g_free() from g_error_free() from cogl_error_free() from cogl_texture_new_with_size() from clutter_offscreen_effect_real_create_texture() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1790525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs