That's weird. You should just be able to: sudo mir_demo_server --vt 1
and it will recognise what vt 1 means. However I recall I have seen the same bug you describe where Mir 'forgot' what "--vt 1" means. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1497547 Title: Mir on X11 server crashed: mir_proving_server: ../../src/xcb_io.c:274: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1497547/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs