https://bugs.winehq.org/show_bug.cgi?id=37705
--- Comment #11 from Sergey Isakov isakov-sl@bk.ru --- (In reply to Taylor Nelson from comment #7)
This is the same issue I'm experiencing: http://heroescommunity.com/viewthread.php3?TID=38901&PID=1145057#focus
Unfortunately the described workaround doesn't work for me as primusrun on this game causes a page fault.
Not sure which issue is more important...
They said workaround is to set Nvidia is always ON in its control panel. In my case it is AMD Radeon HD6670 and the card works in host system. But it drops into darkness in wine environment. Something like power management? May be this observation gives someone an idea what is the bug?