unity8@xps:~$ DESKTOP_SESSION=unity8-mir MIR_SOCKET=$XDG_RUNTIME_DIR/mir_socket MIR_SERVER_PROMPT_FILE=1 MIR_SERVER_HOST_SOCKET=/run/lightdm-mir-0 MIR_SERVER_FILE=$XDG_RUNTIME_DIR/mir_socket MIR_SERVER_NAME=session-0 UNITY_INDICATOR_PROFILE=desktop QT_QPA_PLATFORM=mirserver MESA_DEBUG=1 EGL_LOG_LEVEL=debug /usr/bin/unity8
[1442589557.886428] mirplatform: Found graphics driver: mesa-kms
qtmir.mir: MirServer created
[1442589557.904911] mirserver: Starting
[1442589557.905140] mircommon: Loading modules from: /usr/lib/x86_64-linux-gnu/mir/server-platform
[1442589557.905265] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-mesa-kms.so.3
[1442589557.905345] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/server-mesa-x11.so.4
[1442589557.906295] <WARNING> mircommon: Failed to load module: /usr/lib/x86_64-linux-gnu/mir/server-platform/server-mesa-x11.so.4 (error was:/usr/lib/x86_64-linux-gnu/mir/server-platform/server-mesa-x11.so.4: undefined symbol: _ZN3mir6events10make_eventElNSt6chrono8durationIlSt5ratioILl1ELl1000000000EEEEj16MirPointerActionjffff)
[1442589557.906436] mircommon: Loading module: /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-mesa-kms.so.4
[1442589557.907121] mirplatform: Found graphics driver: mesa-kms
[1442589557.907214] mirserver: Selected driver: mesa-kms (version 0.15.0)
libEGL debug: Native platform type: x11 (autodetected)
libEGL debug: EGL search path is /usr/lib/x86_64-linux-gnu/egl
libEGL debug: added egl_dri2 to module array
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