This is an incomplete GRX driver for DGA2. 8bpp modes don't work, and so the doesn't GRX input. Do not use stdin while in graphics mode (that limitation will probably stay); if you want to test the driver, replace all input in your application with sleep()-s.
Keep in mind that DGA is unstable and may completely lockup your machine or fail to restore the original resolution. I spent a lot of time attemting to workaround the lockup bug, but that seems to be impossible. So if your system locks up, try the VESA driver...
x11-fdv-own-disp.diff is required for the fonts to work. x11-test-dep-fix.diff is required for syntactical reasons.
If you aren't root or DGA2 is not available, GRX will fallback to the default X driver, xwin :-) No DGA1 will be supported (by me).