I have confirmed that rebuilding Unity with the multi-touch functionality disabled does allow Ginn to work on Ubuntu 15.04 x86_64.
Method outlined here: http://askubuntu.com/questions/57586/how-can-i-disable-arbitrary-default-multitouch-gestures-in-unity/90383#90383
Also replicated the frequent crash.
I have confirmed that rebuilding Unity with the multi-touch functionality disabled does allow Ginn to work on Ubuntu 15.04 x86_64.
Method outlined here: http:// askubuntu. com/questions/ 57586/how- can-i-disable- arbitrary- default- multitouch- gestures- in-unity/ 90383#90383
Also replicated the frequent crash.