[lug] anyone know how PCI-E works with Xorg X11 hardware accel?

[Matt Thompson]

D. Stimits wrote:
> I'm curious about something...it used to be everyone with hardware accel 
> had an AGP slot video card. To get hardware accel, the X11 server had to 
> be set for this, plus a kernel module had to be enabled for using the 
> AGP slot. With PCI Express, there is no more AGP slot, but there is a 
> PCI-E driver. Does the X11 server not care if the source of the hardware 
> accel is AGP versus PCI-E? Or is the server unaware of and uncaring of 
> how it gets this ability? Does one PCI-E driver fit all hardware accel 
> PCI-E video cards? And is it ready for "prime time" (especially on 
> nVidia cards)?

Well, my latest box that I was asking about before is a new Dell with a 
PCIe 6800.  And I get the requisite 8000 fps or whatever from glxgears 
with the nVidia drivers.  And ppracer does work well, 120 fps with all 
the video whizbang I could figure out.

Now, I'm not sure about the Xorg driver, nv, but it did work for the 
short time before I downloaded nVidia's drivers.  Maybe to get all that 
DRI jazz working takes more.  All this was without much effort on my 
side and the rather basic anaconda/xorgconf xorg.conf file from Fedora:

Section "Device"
         Identifier  "Videocard0"
         Driver      "nvidia"
         VendorName  "Videocard vendor"
         BoardName   "NVIDIA Unknown (generic)"
EndSection

Someday I'll try to figure out if there are more Option's I need here, 
but it works just fine like that.

Matt
-- 
Learning just means you were wrong and they were right. - Aram
    Matt Thompson -- http://ucsub.colorado.edu/~thompsma/
    440 UCB, Boulder, CO  80309-0440
    JILA A510, 303-492-4662
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