After install Unity 5.3.1f1 (previous I used 5.1.0f3) MonoDevelop ignored unity classes. I tried change editor to a linux's monoDevelop in Edit -> Preferences -> External Tools, but now I can't open any script via Unity. I can't back to previous configuration, I tried reset settings, but reinstall doesn't help.
I don't understand well when you say that MonoDevelop ignored classes but I think it may be like a issue I had. In the MonoDevelop Solution Explorer each .CS file had an icon marked as they were failing to synchronize with server (weired, because I never configured version control via MonoDevelop). I was not able to type anything into the classes marked with that icon. If that's your problem the fix for me was going to Preferences -> Version Control -> General and checking "Disable Version Control globally" and restarting MonoDevelop. Note that I was using the integrated Unity's MonoDevelop. If that doesn't work for you and you want to try again with your non-Unity MonoDevelop try installing this add-ins (if yout didn't) to make it integrate with Unity: http://forum.unity3d.com/threads/unity-add-ins-for-monodevelop-xamarin-studio-5-9.329880/ I hope it helps.
Try closing Unity rename <home dir>/.local/share/unity3d directory to something else (for backup) rename <home dir>/.config/unity3d directory to something else (for backup) relaunch Unity, the folders will be created again, see if the problem persists.
Yeah Had the same problem, did what @sumauma said and had the issue described in the following thread http://forum.unity3d.com/threads/bu...t-get-past-splash-screen.376896/#post-2443982 once fix the that black screen issue, unity - monodevelop works fine
Thanks a lot for help I browse incorrect path to monoDevelop, and that's was reason why I couldn't open scripts (very stupid mistake ;/ ) but still I didn't had autocomplete in editor. Finally I found solution here: http://forum.unity3d.com/threads/li...odevelop-refuse-to-start.378047/#post-2455128 . Now all works pretty fine.