Google founds me that when I search gallium3d and nouveau:
I mean yes radeon is further but they are more close without any support of nvidia here the feature matrix:
the basic stuff inclusive xv works (for fluently videos) also exa (fast 2d accelleration) even some 3d stuff works. But yes radeon driver is gladly a good step ahead, but soooo much more does the radeon driver not do.
But ok the 3d speed really really sucks in comparsion the radeon driver is a roadrunner:
The real issue with nouveau is all the cards that are buggy. If you have the same card that one of the devs is using it tends to work pretty well, but if you have a model that they aren't working on there are tons of bugs all over. The radeon driver is much better at keeping a consistent quality across all their hardware.
yes ok I did not know about the status that detailed before I googled it yesterday that exactly. But the issues look like they could all be on radeon state in 1.5 years, except the 3d speed, there I cannot really give timeline how long it takes to make it as fast as the radeon driver. But lets face it the 3d speed of radeon is good enough for compiz or mutter but nearly for nothing else whats used today. ok some old-gen games.
So yes all around 3d is importent right now, so again at that point I think in 1.5 years nouveau is nearly there where radeon is today and I see not much happen with the radeon driver in this time, but tell me different and I am happy.
Just with gallium3d more code gets hardware-independent so to have here a advantage becomes more different in the future.
Nouveau is not as stable as Radeon; it breaks more often. The developers often have to guess how hardware works as docs are not available.
its my point my point is: if the Catalyst really matters then buy a nvidia!
and if you think that the catalyst is shit because of no regression testing with Git-Bisect and its the biggest security hole in the universe because no source code then buy amd and use the opensource driver. )or maybe intel if you like a criminal monopole syndicate(