On Friday 15 January 2016 22.59:25 Gerhard Zintel wrote:

> Same problem here. It seems to be new, I'm on R14.0.2 (on Mint). I haven't
> observed this before. I searched for a work around without necessity to log
> out (to many open windows to restall) and I found one. I opened the
> Keyboard Layout dialog and un-checked the Enable Keyboard Layouts"
> (switched it off" and voila, the Alt-Gr reapears again.

Thanks Gerhard for this hint. I'll try it as soon as I get the problem again 
(this should be soon I'm afraid) and confirm it works.

Thierry