[Bug 57987] agpgart fails to init

[Michael Vogt]

Public bug reported:

Binary package hint: linux-source

Agpgart fails to init on my amd64 nforce3-250 system w. radeon r200 based agp card.
The error is:
[    0.000000] AGP bridge at 00:00:00
[    0.000000] Aperture from AGP @ f0000000 size 4096 MB (APSIZE 0)
[    0.000000] Aperture from AGP bridge too small (0 MB)
[    0.000000] Your BIOS doesn't leave a aperture memory hole
[    0.000000] Please enable the IOMMU option in the BIOS setup
[    0.000000] This costs you 64 MB of RAM
...
[   26.848016] agpgart: Detected AGP bridge 0
[   26.848631] agpgart: Aperture conflicts with PCI mapping.
[   26.848668] agpgart: Aperture from AGP @ f0000000 size 4096 MB
[   26.848703] agpgart: Aperture too small (0 MB)
[   26.848737] agpgart: No usable aperture found.
[   26.848771] agpgart: Consider rebooting with iommu=memaper=2 to get a good ap
erture.

(same issue was discussed on
http://www.x86-64.org/lists/discuss/msg08790.html without result
apparently.)

Booting with "iommu=" does not help either.

$ uname -a
Linux top 2.6.17-6-amd64-k8 #2 SMP Fri Aug 11 19:13:19 UTC 2006 x86_64 GNU/Linux

Let me know if you need more info for I can help in any way.

Cheers,
 Michael

** Affects: linux-meta (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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agpgart fails to init
https://launchpad.net/bugs/57987