>Why is it so that the grf[0-5]-devices have to be rw for all in order to 
>work, so that every user is able to map in gfxcard-registers and 
>framebuffer? Isn't it considered as a security hole? 

Well I for one would not want to have my X server be suid root but
maybe we could make the device nodes rw for a group and make the
programs which need to rw those devices be sgid.