Radeon X700 Pro can no longer do AGP 8X since commit 295823d0879a
michel at tungstengraphics.com
Thu Sep 13 12:12:08 PDT 2007
On Tue, 2007-09-11 at 03:00 -0400, Sean wrote:
> A git-bisect shows that since commit 295823d0879a in the xf86-video-ati
> tree a X700 Pro card can no longer be set to AGP 8X, using "AGPMode 8"
> in the xorg config file. With older versions of the driver there was
> no error reported setting 8X mode in the log.
> Perhaps this is a case where the new code is doing a better job of
> detecting a problem and not setting 8X mode. Having said that, the card
> is capable of 8X speed and the motherboard has a AGPv3 8X capable
> slot as well.
> A naive reading of the commit suggested that the card was not being
> detected as AGP version 3.
That is correct, based on the capabilities reported by the kernel
agpgart module and the card's AGP_STATUS register. I don't see how the
detection could be different before and after this change...
> Adding a quick hack to force "is_v3" to true, allowed 8X mode to be set by
> the latest driver.
Does agpgart actually set 8x though according to dmesg?
Earthling Michel Dänzer | http://tungstengraphics.com
Libre software enthusiast | Debian, X and DRI developer
More information about the xorg