modesetting and DRI2/3
steve at snewbury.org.uk
Fri Aug 5 11:09:17 UTC 2016
On Wed, 2016-07-27 at 18:24 +0200, zahlenmeer at gmx.de wrote:
> Hey everyone,
> I am struggling to understand how the modesetting driver and DRI play
> This is from Xorg.0.log:
> [ 2350.977] (II) Loading
> [ 2350.977] (II) modeset(0): using drv /dev/dri/card0
> [ 2350.984] (II) glamor: OpenGL accelerated X.org driver based.
> [ 2351.387] (II) modeset(0): [DRI2] DRI driver: i965
> [ 2351.387] (II) modeset(0): [DRI2] VDPAU driver: i965
> And this is from glxinfo:
> libGL: Using DRI3 for screen 0
> I read that modesetting uses DRI3 by default so I am a bit surprised
> read something like "modeset(0): [DRI2]" in my logs. I also tried and
> compiled xorg with the --disable-dri2 flag. In this case I get aiglx
> errors that modesetting failed to initalize the DRI2 extension.
> Could anyone explain this behaviour to me?
> Kind regards
> xorg at lists.x.org: X.Org support
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VDPAU doesn't use DRI3 as yet, AFAIK.
DRI2 is still available unless it's build time disabled, even if DRI3
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