Thanks for all that info. With that I was able to get to the bottom of it pretty quickly:
Native Mir servers start fine (see unity-system-compositor.log in comment #4) but clients including the nested Untiy8 server fail to start: std::exception::what: Nested Mir Display Error: Failed to initialize EGL.: EGL_NOT_INITIALIZED (0x3001) If you look at the EGL docs, this error means eglInitialize was given an invalid display parameter. And that will happen if the version of Mesa you're using lacks the egl-platform-mir.patch (lacks Mir support). Turns out you're using a custom version of Mesa: 11.3~git160422173900.e85bef8~w~padoka0 which lacks Mir support. So of course Mir clients like the nested Unity8 server will fail to start. Please remove your custom Mesa version 11.3~git160422173900.e85bef8~w~padoka0, and replace it with the Ubuntu-provided Mesa: https://launchpad.net/ubuntu/+source/mesa And then you'll have no such problem. ** Changed in: mir Status: New => Invalid ** Changed in: mir (Ubuntu) Status: New => Invalid ** Changed in: unity8 (Ubuntu) Status: New => Invalid ** Changed in: unity8-desktop-session (Ubuntu) Status: New => Invalid -- 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/1584635 Title: Black screen after logging in to Unity 8 [std::exception::what: Nested Mir Display Error: Failed to initialize EGL.: EGL_NOT_INITIALIZED (0x3001)] Status in Mir: Invalid Status in mir package in Ubuntu: Invalid Status in unity8 package in Ubuntu: Invalid Status in unity8-desktop-session package in Ubuntu: Invalid Bug description: I'm running 16.04 64-bit (upgraded from 15.10 which was upgraded from 15.04) and followed mhall's tutorial here http://mhall119.com/2016/05 /dogfooding-unity-8/ The error in the log was: Failed to initialize EGL I have a mobile AMD GPU with open source drivers: Gallium 0.4 on AMD RV620 Full unity 8 log here: http://paste.ubuntu.com/16581290/ The comment suggesting $ sudo sysctl restart lightdm fails with sysctl: cannot stat /proc/sys/restart: No such file or directory sysctl: cannot stat /proc/sys/lightdm: No such file or directory Switching TTYs and back again doesn't help. I still have a completely black screen. To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1584635/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
