https://bugs.winehq.org/show_bug.cgi?id=45080 --- Comment #11 from Toni <eldrad(a)autistici.org> --- Yep by the apitrace it looks like it's getting a null IDXGIDevice2 and that might be the reason of a crash if the app is using the pointer blindly after that. You can try returning IDXGIDevice1 instead on that query and see what happens. If you get lucky IDXGIDevice2 specific methods won't be really used, otherwise you would have to implement the interface more or less properly (something like bug 41063), or more interfaces might be needed after that. It might be smth else, but if that's the whole apitrace it doesn't seem to be much more going on. About using the debugger I can't help you but I'm sure there must be a way, although by your previous info and the apitrace it already seems to be pointing somewhere. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.