[ltp] Re: 4x AGP on the A31p (and T30)

[D. Sen]

Vidyut Luther wrote:
 > Just a note to all those who are using the AGP 4x mdoe by setting the 
mode
 > in X config.
 >
 > This is what I got from Mike Harris,
 > "As far as AGP goes though, it doesn't matter what
 > card/chip you have.  XFree86 can only use whatever AGPmode that
 > the chipset is in when it starts up, which is currently
 > programmed by the BIOS."
 >

Uhmm that tells me that XFree86 *can* use the 4x mode if the BIOS
initialized the chipset correctly. However, that doesnt tell me that the
relevant "options" line in /etc/X11/XF86Config-4 does not make a
difference. Judging from the output of `glxinfo` and the speed at which
glxgears runs it would seem that specifying "AGPMode" "4" as opposed to
"AGPMode" "1" does make a difference.

It obviously makes a huge difference in terms of APM. Hope someone fixes
that soon.

DS

 > This might be the reason why you're having issues with the card and the
 > APM etc ? .
 >
 > i'll look at XiG's server just to see if AGP 4x is possible.
 > In other words, X should not be used to set the AGP mode of the card.
 >
 > On Thu, 18 Jul 2002, D. Sen wrote:
 >
 >
 >>On the T30 which has the Radeon Mobility M7 graphics chipset, I can get
 >>4x AGP up by editing the "Option	    "AGPMode" "4" in the devices section of
 >>XF86Config-4.
 >>
 >>*However* The machine doesnt survive a suspend-resume cycle in AGP 4x
 >>mode. The machine freezes requiring a cold reboot at an attempt to
 >>resume the machine after it has been suspended. Same symptom persists
 >>when I set the option for AGPMode "2".
 >>
 >>A31 machines portray this behaviour as well?
 >>
 >>
 >>Kristjan Onu wrote:
 >>
 >>>Rob Mayoff <mayoff@dqd.com> wrote:
 >>>
 >>>
 >>>>+---------- On Jul 18, Kristjan Onu said:
 >>>>
 >>>>
 >>>>>Other than having to specify "AGPMode" in my XF86Config file, I didn't
 >>>>>need to do anything special, so I'm afraid I won't be much help in
 >>>>>getting your A31p up to 4x AGP.
 >>>>
 >>>>Are you using the Radeon framebuffer console driver?  This is separate
 >>>
 >>>>from the radeon X module, but perhaps it initializes the AGP state.
 >>>
 >>>
 >>>To be honest, I'm not sure. lsmod does list radeon (and agpgart), but
 >>>in my XF86Config-4, I have "UseFBDev" "false".
 >>>
 >>>Kristjan
 >>>
 >>>
 >>>
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 >>>
 >>
 >>
 >>
 >


-- 
D. Sen, PhD
http://www.auditorymodels.org/~dsen




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