When I try to use DGA2, I get "resolution not supported", but the X server does actually support that resolution !
Description
When I try to use DGA2, I get "resolution not supported", but the X server does actually support that resolution !
There are two possible reasons:
1) DGA2 may support different resolutions/color depths than X,
run the gfxinfo program to know what combinations you can use,
2) You may have a buggy DGA2 implementation, see next question.