install unity3d on gentoo linux (unity-editor-installer-5.4.0b13+20160406.sh , 5.4.0b13) http://forum.unity3d.com/threads/unity-on-linux-release-notes-and-known-issues.350256/#post-2586478 Not working gray welcome window
I'm running Gentoo, too. Same issue. The welcome window worked until one of the earlier releases last autumn. I think there was a new dependency but I haven't bothered hunting it down yet because... ...everything else is working really well and rock solid -- if I launch Unity with the -projectpath parameter to directly load a project and forego the welcome window.
Just checked ~/.config/unity3d/Editor.log, it contained the following: npm is the package manager from node.js. No idea why Unity needs it to launch instead of only when doing a WebGL build, but a quick solved the issue and the welcome window is now working. nodejs is very low on dependencies (two lesser libraries), so it shouldn't be too bad.
Yes it should definitely be fixed in the editor that it doesn't give a proper error message that asks the user to install npm. It's not exactly hard to fix when you know what is going on, but the launch window of Unity tells absolutely nothing about the actual problem it has in that moment.