http://bugs.winehq.org/show_bug.cgi?id=14394
--- Comment #28 from Patrick McFarland diablod3@gmail.com 2010-08-14 09:28:48 --- For me, Source games merely segfault/otherwise exit. Extremely rarely does X crash or the machine lockup altogether, and yes, I agree, those are driver bugs.
Now, something I have noticed, if I run X for, say, a month or two X eventually locks up when running a GL app. Wine+Source seems to trigger this in days (if I repeatedly start the Source game back up). This is a bug, but I wonder if Wine is accidentally triggering it more than it should.