-------- Original Message --------
From: Roland Scheidegger <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: Re: [Dri-users] Savage DRI memory requirements compared with MS Windows 2000
Date: Mon, 04 Sep 2006 02:35:17 +0200
> [email protected] wrote:
> > Hi.
> >
> > According to my /var/log/Xorg.log, 8844 kB of Videoram is needed for 3D at a
> > resolution of 1400x1050 at 16 bpp. My IBM Thinkpad T21 has an onboard "S3 Inc.
> > 86C270-294 Savage/IX-MV" which only contains 8192kB of video ram, so I can't
> > get 3D at this resolution/colour-depth. MS Windows 2000, however, seems to
> > handle direct rendering OK at this setting (in fact, I even get the option to
> > run at 24-bit colour).
> >
> > Is the larger memory requirement a by-product of Xorg's DRI implementation, or
> > is there something I can do (as an end-user) to reduce the memory requirement?
> > Apologies if this mail seems like I'm trolling - it's just an honest question.
> 1) Depending on the chip, it may be possible to put backbuffer (maybe
> even depth buffer) into apg memory instead of local video ram. Not sure
> if the savage you got could do that (if in windows you can actually run
> 3d apps at the full 1400x1050 screen resolution then it can probably do
> it). Even if the chip could do it there would probably be a performance
> penalty for doing so.
Thank you for the info, Roland. (I'm pleased to say it made sense to a non-
graphics programmer like me!)
Regarding the ability to put the backbuffer/depth buffer into agp memory
(rather than local video ram), is this something I can do with the existing
xorg dri code? If not, do you know whether it's something that's planned for
the future, or is it "difficult" (technically) to enable?
Jaime
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