Hi,
TF2 has been a bit like that of late, I'm not sure where the issue is there...
(might be the CXG-9 release or it might be just a coincidence that TF2 started
to do this after numerous Steam updates that started to appear after the Mac
version of the Steam UI shipped) ...I'm sort of waiting for the next CXG release
before I start throwing stones at this...
ATI 'lost me as a customer' many years ago when it became clear their linux driver
support was woeful compared to what nvidia has been capable of in the same regard.
If installing the proprietary drivers moved all this forward, you're probably now
experiencing some of these woeful driver supports I speak of.
You cannot compare what windows does with the same title on the same hardware - the
reason is (again..) that Ati drivers for windows are in a lot better state than the
other OS drivers for their products.
Make sure you don't have compiz or any other desktop effects enabled when trying to
use crossover/wine - typically speaking these desktop effects are detrimental to the
performance of games hoisted with crossover/wine.
You might be able to pass some extra runtime options at the Source based games to get
them to run better....have a look at the following threads;
http://www.codeweavers.com/compatibility/browse/name/?app_id=3379;tips=1
http://supportwiki.steampowered.com/wiki/Setting_Game_Launch_Options
Cheers!
edit: another user posted today this wrt another game but using about the same hardware
and drivers you are using...;
APP ID: 6058
NAME: Anno 1404: Dawn of Discovery
UPDATE BY: kongwak
DETAILS: new comment added to application
SUBJECT: using an ATI 5700 series card
BODY:
I just thought that I would suggest that anyone trying to get this game to work with a an ATI 5700 video card you upgrade the catalyst driver to at least 10.6 (the latest at the time of writing).
Also I found that I needed to change the in games graphic settings for:
shadow quality - off
atmospheric scattering - low
Post effects - low
Going by that report, what you are seeing seems somewhat analogous.