[Gllug] OT new graphics card compatibility

[Ben Fitzgerald]

On Sat, Nov 19, 2005 at 02:19:57AM +0000, Nix wrote:
> On Fri, 18 Nov 2005, will at willj.net gibbered uncontrollably:
> > Simon Perry wrote:
> >>> - If I buy an AGP 8x card and my PC only has an AGP slot less than '8x',
> >>> will it still work, just a bit slower.
> >> http://wiki.linuxquestions.org/wiki/AGP
> >> States that 8x cards are only backwards compatible to 4x.
> > 
> > That is good, but I have no idea if my motherboard is AGP 2x or AGP
> > 4x, I assume the latter, but is there a way of finding out from the
> > shell?
> 
> Build in the agpgart module and see what it says.
> 
> My box says
> 
> agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
> 
> and then when the video card boots
> 
> agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode
> agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode
> 
> (but I could tell anyway, because 2.0 -> 1x, 2x, 4x, not 8x).

as the OP said, lspci will do the job for more info.

e.g.

# lspci -v -s 0:2.0

0000:00:02.0 VGA compatible controller: Intel Corp. 82815 CGC [Chipset Graphics Controller] (rev 02) (prog-if 00 [VGA])
	Subsystem: Compaq Computer Corporation: Unknown device 001a
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 11
	Memory at 44000000 (32-bit, prefetchable) [size=64M]
	Memory at 40600000 (32-bit, non-prefetchable) [size=512K]
	Capabilities: [dc] Power Management version 2


hth,

ben.

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