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Old 04-09-08, 03:48 PM   #5
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Join Date: Jul 2005
Posts: 4
Default Re: Agpgart vs nvagp

Originally Posted by krionius
there should be some compatibility list around the net about nvagp vs. different agp chipsets, or shouldn't there? I might remember wrong.
here's one:

I can't even start X with NvAGP set to anything except "0" (off), which tests the limits of my workstation. One 1920x1200 screen is ok but if I try to TwinView a 2nd 1920x1200 display w/o clone then I am dead in the water. If I use compiz with 2x 1920x1200 I have to kill X or do a hard reset. Running with AGP off is simply not a viable option for me.

* 2x dual-core Opteron 275, 64-bit @ 2.2GHz
* Tyan k8w s2885
* ASUS GeForce n6200 128M AGP 8x
* ubuntu hardy beta, amd64
* kernel 2.6.24 w/ agpgart & iommu support compiled in
* 7.3
* nvidia driver 169.12
* gnome
* metacity and compiz fusion 0.7.0

Ubuntu ships with agpgart compiled into the kernel proper. Compiling a kernel w/o agpgart doesn't help. Nor does passing the kernel agp=off. I still have to set NvAGP to "0" to use the nvidia driver. The nv driver works fine with agpgart @ 1920x1200, but I can't use a 2nd monitor.

I tried booting a 32-bit version of Ubuntu without success, but I did not investigate that thoroughly as running a 32-bit OS doesn't tickle my fancy.

Even with AGP off I am getting Xids.

I have two similar Xids logged in succession:
[14556.544275] NVRM: Xid (0005:00): 6, PE0000 04b4 00323232 00009ad8 00000000 00323232
[14556.549216] NVRM: Xid (0005:00): 6, PE0000 04b4 00323232 00000000 00000000 00000000
I'm going to double-check that SBA is enable in my BIOS and try it once again, but I have been at this for nearly a week.

Here's another interesting fact: I have Windows Vista dual booting and the Nvidia drivers on that side cause a BSOD before I even get a login screen (similar to Ubuntu freezing when X starts, no switching to a VT). The default driver Vista uses worked reasonably well. Could it be a hardware problem or BIOS setting we need to fsck with?
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