Hi, On Thu, Jun 23, 2011 at 11:04:30PM +0530, PRASANNA KUMAR wrote: > I came across something called as KGI - kernel graphics interface > (http://www.kgi-project.org/). It seems it provides the same features > as KMS. What is the difference between those two? Well, KMS is actually an extension of the DRM; together they handle all aspects of the graphics hardware access -- which is indeed very similar to what KGI intended to do. (And it's kinda fun watching KMS developers reinvent various ideas that were already present in KGI one by one :-) ) > Any specific reason for not choosing KGI? Several. Generally speaking, KGI did too much. Rather than just graphics hardware drivers, they also reinvented the whole input and console systems along the way -- not as patches against the existing code base, but as a completely new code base written from scratch. Obviously, Linus didn't like that. On the application side, they weren't very cooperative either: XGGI (X server adapted to work with KGI) was basically a fork of XFree86, and for all I know they never even *tried* discussing the ideas with upstream. Also their drivers were written from scratch (with some major overengineering applied there) -- unlike the KMS drivers, which are somewhat adopted ports of the preexisting and usually quite mature X drivers. To sum up, the KGI folks mostly had the right ideas more than a decade earlier -- but they totally failed to present them in a viable form :-( -antrik- _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
