Have a desktop computer, composed by myself.
The interesset fact is, that i have the same problem still in (X)Ubuntu 14.04.4.
On Linux Mint worked it perfectly.
Did install now that Ubuntu and still have the problem with the Launcher Crash, at start there was a missing gnome-key-ring lib (gnome-keyring-pkcs11.so)
Now the console dont tell me any problems "err:" only a ton of "fixme" and a bugsplat crash from lol