http://bugs.winehq.org/show_bug.cgi?id=6971
--- Comment #183 from Vitaliy Margolen vitaliy@kievinfo.com 2008-10-10 11:20:26 --- Most video drivers do not support DGA anymore. And most distros disabled/removed it from default Xorg configuration. DGA also required additional access to memory and other resources that considered a bad thing now. So even if you enable it in xorg it won't run in most setups.
So for all practical purposes DGA is dead.