Hey, Op 12-06-12 05:52, Eric Appleman schreef: > On 06/11/2012 09:41 PM, Bryce Harrington wrote: >> On Mon, Jun 11, 2012 at 05:30:39PM -0400, Eric Appleman wrote: >>> Per my understanding the decision of X server 1.12 vs 1.13 is undecided. >>> Assuming 1.13 could ship (meaning AMD does a special Catalyst like they >>> always do), DRI2 offloading without dynamic switching could be supported >>> for Intel UXA + Nouveau setups. >>> >>> In terms of exposure to the user, David Airlied put forth the following >>> comment [1][2]. >>> >>> "the first implementation will just involve setting an env var, like >>> DRI_PRIME=1, then I'm hopefully going to add a gnome-shell extension to >>> make the same possible from a launcher or some sort. >>> >>> After that people can do what they like ;-)" >>> >>> X server 1.14 should have dynamic switching and my assumption is that >>> 13.04 will ship with it, but the opportunity exists to have some level >>> of hybrid graphics support for 12.10. >>> >>> However, the plans to ship Intel SNA kinda interferes with this since >>> Prime is UXA-only at the moment [3]. I have no idea if SNA Prime is even >>> feasible for 13.04. >>> >>> If SNA is not deemed ready for 12.10 due to bugs or a perceived >>> immaturity, UXA Prime will ship (assuming 1.13). >> Thanks for the head's up on UXA Prime. >> >> Offhand, both SNA and Prime sound like they're promising higher >> performance for users. SNA presumably would benefit a wider scope of >> users since it applies to all hardware, however Prime would enable >> hardware that currently is bordering on unusable, even if that >> represents a smaller scope in the market. Conversely, the regression >> risk on SNA is a lot higher, so I still think it's the most fruitful >> thing to test near-term. >> >> But, a large part of why we're going to try enabling SNA now is to help >> bring issues - like this one - to light. I'm hoping if we do end up not >> going forward with SNA this cycle, that at least it'll give us some >> tangible feedback for upstream, so we can have a better chance in the >> future. >> >> Bryce >> > > Intel UXA + Nouveau EXA prime also depends on the rest of the drvscreen > code landing in stable releases of each DDX. The basic framework started > landing a few days ago in master branches. Current trajectory has > everything on track. Once the api has been worked out, it will be really trivial[2] to make prime work with SNA, so I wouldn't worry about it. I've been helping airlied out as well on the nouveau side, but some bugs related to sharing tiled buffers haven't been worked out yet.
> I personally think SNA is ready, but the daily commits make it hard to > track what changes over the course of a week. It was only a few days ago > that a bug affecting rendering of Ambiance-themed elements was fixed[1]. > Everything has been stable since, but it was pretty bad and Ubuntu specific. > > - Eric > > [1] https://bugs.freedesktop.org/show_bug.cgi?id=48630 > [2] For small amounts of trivial, it won't be that much work at least. -- Ubuntu-x mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-x
