cannot enable direct rendering using the on-board Intel(r) 946GZ Express Chipset. driver i810

[German Becker]

Hello,

I'm using the on-board Intel(r) 946GZ Express Chipset and I have
realized that direct rendering is disabled. I have found the following
in Xorg.0.log:

----
(EE) GARTInit: Unable to open /dev/agpgart (No such file or directory)
(WW) I810(0): /dev/agpgart is either not available, or no memory is available
for allocation.  Using pre-allocated memory only.
......

(EE) AIGLX: Screen 0 is not DRI capable

....

(II) I810(0): direct rendering: Disabled
----

I tried adding more memory and enabling DRI explicitly in the
xorg.conf file, adding the following lines, but no luck....

What can be happening?

Thank you in advance

Germán Becker