http://bugs.winehq.org/show_bug.cgi?id=25673
--- Comment #6 from sunderphon@gmail.com sunderphon@gmail.com 2011-01-14 02:30:59 CST --- (In reply to comment #5)
This still affects me. Do you have any idea about what could be causing this? Do you do anything differently to start the game?
I completely reinstalled the game, removing every single content file labelled with garry's mod. (I will list these in a later comment when I have access to the machine with gmod on)
I installed on a windows machine and just ported the files over via LAN and now everything works fine. Steam community is enabled, so unless I have some odd fix for that elsewhere I don't think it's the culprit.