Re: direct rendering on 1280x854 TiBook
On Sam, 2002-09-28 at 00:33, christophe barbé wrote:
> On Fri, Sep 27, 2002 at 05:54:57PM -0400, christophe barbe wrote:
> > It works significantly faster for opengl based display. But doing my
> > test with xscreensaver I can see that a few 2d screensaver are slower.
> > It looks like they are no more double-bufferized or the image chaged is
> > not in sync. For example "Spotlight" is slower and you can see the spot
> > appers in a few scan.
>
> To get drm-trunk installed I had to rebuilt the kernel without r128.o and
> radeon.o because they come with drm-trunk.
>
> The diff between the two X log is small. One difference is that AGP is
> said "not available" in the second case and then fall back to PCI when in
> the first case AGP is never mentionned.
> Also in the second case agpgart is not loaded and if I load it manually
> before, I see no differences.
>
> I am missing something to get AGP used?
You need to load agpgart before the radeon kernel module.
I have /etc/modutils/drm with
pre-install radeon modprobe agpgart
for that.
> Can this explain the significant slowdown for 2D?
Possibly, PCI GART seems to be very slow on a TiBook III, I suspect
that's related to the L3 cache.
--
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member / CS student, Free Software enthusiast
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