https://bugs.freedesktop.org/show_bug.cgi?id=60929
--- Comment #19 from hadack@gmx.de --- I can confirm that changing DisablePrettyStackTrace to true generally in llvm fixes the startup hang. Tested with different mono based Games(Expedition Conquistador, Rochard, Bastion) on radeonsi. And i have to say I'm quite happy with the performance in the games. Thanks, guys!