https://bugs.winehq.org/show_bug.cgi?id=40182
--- Comment #4 from gourgou gourgou.dump@club-internet.fr --- Yes, solved for me at least. Never had a connexion issue afterwards!
Well… I mean, until the release of the latest DLC (thieve's guild), when the developper dropped support for DX9 and, incidentally it seems, for the "Renderer" line in UserSettings.txt altogether. Since then, any attempt to launch the game from wine ended up with an error report stipulating that DX11 couldn't be found (duh…)
I believe (but have no solid info on the matter) that OpenGL support simply got lost in translation. Wether it might make a come-back some day, I have no inkling at all, but am not really confident.
I have simply rm'ed -Rf my wine prefix and game directory.