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<H1>[Mageia-dev] [RFC] nouveau, swrastg, libdri-drivers-experimental</H1>
<B>Anssi Hannula</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20%5BRFC%5D%20nouveau%2C%20swrastg%2C%20libdri-drivers-experimental&In-Reply-To=%3C4EE7FFAA.1030509%40mageia.org%3E"
TITLE="[Mageia-dev] [RFC] nouveau, swrastg, libdri-drivers-experimental">anssi at mageia.org
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<I>Wed Dec 14 02:45:14 CET 2011</I>
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<PRE>On 05.12.2011 08:09, Anssi Hannula wrote:
><i> Hi!
</I>><i>
</I>><i> 1. nouveau
</I>><i>
</I>><i> I propose to move nouveau DRI drivers from libdri-drivers-experimental
</I>><i> to libdri-drivers.
</I>><i>
</I>><i> Fedora moved them out of -experimental in last January, Ubuntu in last
</I>><i> June, OpenSUSE in July (though OpenSUSE doesn't have the legacy
</I>><i> nouveau_vieux DRI driver at all), and Debian a week ago.
</I>><i>
</I>><i> I've been running with it for the last week or so with no problems on my
</I>><i> card.
</I>><i>
</I>><i> WDYT?
</I>
No one was against, so I'm moving nouveau drivers to main dri-drivers
package.
><i> 2. swrastg
</I>><i>
</I>><i> It seems we have both swrast_dri.so and swrastg_dri.so in libdri-drivers
</I>><i> package.
</I>><i>
</I>><i> swrast_dri.so is the traditional SW rasterizer used when there is no HW
</I>><i> support.
</I>><i>
</I>><i> swrastg_dri.so is the Gallium3d-based rasterizer which is considerably
</I>><i> faster.
</I>><i>
</I>><i> However, actually only swrast_dri.so is used, so should we:
</I>><i> 1) switch to swrastg, drop swrast (Fedora in Nov 2010)
</I>><i> 2) keep it as is, unused (~4 MB)
</I>><i> 3) move swrastg to libdri-drivers-experimental (Ubuntu in Jun 2010,
</I>><i> Debian a week ago) which nouveau is probably moving out of
</I>><i> 4) drop swrastg completely for now (seemingly OpenSUSE)
</I>><i>
</I>><i> Unfortunately I have no idea on the status of swrastg beyond the above
</I>><i> distro information, and the fact that it does indeed work as tested
</I>><i> while writing this, and XBMC runs smoother with it than with swrast.
</I>><i>
</I>><i> I'd be somewhat inclined to follow Fedora here, but I'm not at all sure.
</I>><i>
</I>><i> WDYT (see also below)?
</I>
Seems 1 was more preferred in general, so I'll do that and drop legacy
swrast.
><i> Implementation note: With a quick look I didn't find any easy way to
</I>><i> switch a system to use swrastg_dri.so when both are installed; if we
</I>><i> want to provide switching between them, we need to either
</I>><i> a) use alternatives for swrast_dri.so, or
</I>><i> b) have swrastg_dri.so in a different dir and have that path first in
</I>><i> the dri search path so that when -experimental is installed, it
</I>><i> will get preferred (while mesa has the needed code already, xserver
</I>><i> would need a trivial patch as it currently has a single search path)
</I>><i>
</I>><i> WDYT?
</I>><i>
</I>
--
Anssi Hannula
</PRE>
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