Intel 945GM and FreeBSD agp(4) driver [updated]

After backport 945GM support from i810 from Xorg 7.0, i try to make agp(4) work on my 945GM.

Yesterday i found the solution for this, after read some pieces of code from Linux i found that problem are caused because agp(4) driver recognize 945GM as 128MB instead of 256MB aperture size.

After that i make this patch. I already submit this patch to Eric Anholt (anholt) and i don’t know if there’s are correct, but on my tests work’s.

PR: 103079

Update: Eric Anholt found correct method to verify agp aperture size and commited in -CURRENT. Patch to RELENG_6 can be found here.

16 Responses to “Intel 945GM and FreeBSD agp(4) driver [updated]”


  • Excuse me my ignorance, but, after apply your patch, can you run X with acceleration with 945GM??
    Thank you!!

  • TooManySecrets: Yes you can.

    Eric Anholt: PR kern/103079

  • marcus,

    Eu tenho um D520 e fico muito feliz em saber que foi um brasileiro que construiu o patch para que o X funcionasse!

    Obrigado! =)

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