View Single Post
Old 05-19-06, 03:36 PM   #1
Registered User
Join Date: Feb 2005
Posts: 3
Default AGPGART & IOMMU problem with AMD64 & FC5

Hi, I've been searching the forum, but with no luck. I have a Gigabyte K8NSC motherboard, AMD64 3700+ processor, and an NVIDIA 6800 GT (AGP) graphics card. I just bought the motherboard and installed Fedora Core 5. Now I'm faced with not being able to get AGP to work. I've installed kmod-nvidia-1.0.8756- from the livna repository.

dmesg gives me the following messages:

Checking aperture...
CPU 0: aperture @ f0000000 size 32 MB
Aperture from northbridge cpu 0 too small (32 MB)
AGP bridge at 00:00:00
Aperture from AGP @ f0000000 size 4096 MB (APSIZE 0)
Aperture from AGP bridge too small (0 MB)
Your BIOS doesn't leave a aperture memory hole
Please enable the IOMMU option in the BIOS setup
This costs you 64 MB of RAM


agpgart: Detected AGP bridge 0
agpgart: Aperture conflicts with PCI mapping.
agpgart: Aperture from AGP @ f0000000 size 4096 MB
agpgart: Aperture too small (0 MB)
agpgart: No usable aperture found.
agpgart: Consider rebooting with iommu=memaper=2 to get a good aperture.
PCI-DMA: Disabling IOMMU.
I can find no options regarding AGP aperture or IOMMU in the BIOS.

Has anyone come across the same problem and solved it? I'd be very grateful for any help.

fahlen is offline   Reply With Quote