$ mir_demo_server --arw-file
[2017-03-21 10:57:22.803284] mirplatform: Found graphics driver: mir:mesa-kms (version 0.26.1)
[2017-03-21 10:57:22.805047] mirplatform: Found graphics driver: mir:mesa-x11 (version 0.26.1)
[2017-03-21 10:57:22.805218] mirplatform: Found graphics driver: throw-on-creation (version 0.26.1)
[2017-03-21 10:57:22.805279] mirplatform: Found graphics driver: mir:stub-graphics (version 0.26.1)
[2017-03-21 10:57:22.806619] mirserver: Starting
[2017-03-21 10:57:22.806861] mircommon: Loading modules from: /usr/lib/x86_64-linux-gnu/mir/server-platform
[2017-03-21 10:57:22.806921] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-mesa-kms.so.12
[2017-03-21 10:57:22.806946] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/server-mesa-x11.so.12
[2017-03-21 10:57:22.807526] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/input-evdev.so.6
[2017-03-21 10:57:22.808405] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-throw.so
[2017-03-21 10:57:22.808596] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-dummy.so
[2017-03-21 10:57:22.809027] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/input-stub.so
[2017-03-21 10:57:22.810352] mirplatform: Found graphics driver: mir:mesa-kms (version 0.26.1)
[2017-03-21 10:57:22.811152] mirplatform: Found graphics driver: mir:mesa-x11 (version 0.26.1)
[2017-03-21 10:57:22.811250] mirplatform: Found graphics driver: throw-on-creation (version 0.26.1)
[2017-03-21 10:57:22.811278] mirplatform: Found graphics driver: mir:stub-graphics (version 0.26.1)
[2017-03-21 10:57:22.811591] mirserver: Selected driver: mir:mesa-kms (version 0.26.1)
ERROR: /build/mir-sajBv9/mir-0.26.1+16.04.20170209.1/src/server/graphics/default_configuration.cpp(133): Throw in function mir::DefaultServerConfiguration::the_graphics_platform()::<lambda()>
Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >
std::exception::what: Exception while creating graphics platform
ERROR: /build/mir-sajBv9/mir-0.26.1+16.04.20170209.1/src/platforms/mesa/server/kms/linux_virtual_terminal.cpp(220): Throw in function int mir::graphics::mesa::LinuxVirtualTerminal::find_active_vt_number()
Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >
std::exception::what: Failed to find the current VT
$ mirrun neverball
Failure to initialize SDL (Failed to connect to the Mir Server)