Most definitely not the lack of the graphics drivers as I have those installed on my machine and have a working Unity 8 desktop session.
Another data point is that this doesn't occur when running against mir_demo_server, but only when running in a Unity 8 desktop session. I start an Xmir instance using a desktop file like the following: $cat ~/.local/share/applications/xmir-debug.desktop [Desktop Entry] Version=1.0 Name=XMir Debug Exec=Xmir :1 Type=Application StartupNotify=true X-Ubuntu-Touch=true Then from an ssh session, I do something like: $ DISPLAY=:1 xprop -root I get the following output: _XKB_RULES_NAMES(STRING) = "evdev", "pc105", "us", "", "" But after the command is finished, the Xmir window goes away and the error message I put in the description is printed in ~/.cache/upstart /application-legacy-xmir-debug-blah.log. The test program that William attached to this bug also produces the same behavior while in a Unity 8 desktop session. I hope this helps. Also, considering it doesn't occur when running with mir_demo_server, it's probably not a Mir/Xmir issue, but I'm really not sure whose problem it is, but it needs fixing:) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1481330 Title: Xmir crashes when client closes display Status in Mir: New Status in mir package in Ubuntu: Confirmed Status in xorg-server package in Ubuntu: Confirmed Bug description: Xmir crashes when a client loses its connection to Xmir, either through XCloseDisplay, or by normal program termination. This affects xprop and GTK applications (they temporarily open a connection to the X server to obtain the value of the AT_SPI_BUS property on the root window). This is what is printed in application's upstart log: (EE) Fatal server error: (EE) Failed to connect to Mir: Failed to process connect response: /build/mir-3eDTxk/mir-0.14.0+15.10.20150723.1/src/client/probing_client_platform_factory.cpp(37): Throw in function virtual std::shared_ptr<mir::client::ClientPlatform> mir::client::ProbingClientPlatformFactory::create_client_platform(mir::client::ClientContext*) Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE std::exception::what: No appropriate client platform module found (EE) To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1481330/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp