No access to clipboard in Linux?

I am trying to paste registration key from clipboard into text field, it works fine in Windows builds, but doesn’t work in Linux at all. Is this a bug or behavior by design?
I have tried:

  1. Ctrl+V
  2. Add a button and use TextEditor
  3. Use reflection to get “systemCopyBuffer” property

None of it works in Linux.
Any known workaround for that?

It is likely a combination of your OS, desktop style, and Unity.

What OS and windows management are you using?
(ie: CentOS and KDE)

I would try pasting it into Gedit first and then re-copying, pasting again into Unity… a fair few apps in linux have copy paste problems

I’m not much a Linux user myself, but after player reports this problem to me in Ubuntu I have also installed fresh latest Linux Mint dist and got the same result. So I assume this is a problem in any Linux build.
I tried to copy just a simple string and paste it in several different applications, like internet browser etc. It works fine, except Unity GUILayout.TextArea

Sounds like a Unity bug then, probably should report it; this QA is quite good