http://bugs.winehq.org/show_bug.cgi?id=31860
--- Comment #18 from voidcastr voidcastr@gmail.com 2012-10-03 16:21:40 CDT --- First, try if you can also observe the issue trying to rotate your character in the login screen. If so, this might save you a lot of time on subsequent attempts.
(In reply to comment #16)
I don't know how to make such a trace.
Start the game with WINEDEBUG=+cursor /compiled_wineroot/wine /path/to/Gw2.exe -dx9single &> log.txt
Then try to rotate the character/camera a few times and exit the game.
Now, analyze log.txt. For every rotation attempt you should see - several lines starting with "trace:cursor:enable_xinput2" in the log, directly below each other - one line starting with "trace:cursor:disable_xinput2"
At least that's what I get.