amd64/71753: DRI loads but fails to render on Radeon
anholt at FreeBSD.org
Wed Sep 15 18:10:17 PDT 2004
The following reply was made to PR amd64/71753; it has been noted by GNATS.
From: Eric Anholt <anholt at FreeBSD.org>
To: John Baldwin <jhb at FreeBSD.org>
Cc: freebsd-amd64 at FreeBSD.org, Adam Gregoire <bsdunx at yahoo.com>,
gnats <freebsd-gnats-submit at FreeBSD.ORG>
Subject: Re: amd64/71753: DRI loads but fails to render on Radeon
Date: Wed, 15 Sep 2004 18:07:52 -0700
On Wed, 2004-09-15 at 14:24, John Baldwin wrote:
> Do you have any errors in Xorg.0.log? Also, did you add an 'AGPSize' option
> to your Xorg config file to tell it you have a 64MB aperture? X seems to
> assume a default size of 8MB unless you explicitly tell it you have more.
The AGPSize is just to say how much of the aperture to allocate and bind
for use. It turns out that 8MB is all that's really necessary, due to
poor or nonexistent use of AGP textures, so that basically what gets
used in AGP are the 3MB of vertex/indirect/ring buffers.
I wasn't previously aware of any 64-bit issues in the Radeon/R200 DRI
(and some have used these on 64-bit machines before), but to me that
seems like the most likely reason to find bad command buffers.
Eric Anholt eta at lclark.edu
http://people.freebsd.org/~anholt/ anholt at FreeBSD.org
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