https://bugs.winehq.org/show_bug.cgi?id=40827
--- Comment #2 from Aaron Franke arnfranke@yahoo.com --- Steam Big Picture mode also requires ntdll NtLockFile I/O completion on lock
From Steam Big Picture STDERR Log: fixme:ntdll:NtLockFile I/O completion on
lock not implemented yet
Full log: https://pastebin.com/ayhgum69
Confirmed for Wine 2.22.