https://bugzilla.kernel.org/show_bug.cgi?id=19002

--- Comment #31 from Alex Deucher alexdeucher@gmail.com 2010-12-15 15:45:13 --- (In reply to comment #28)

Is there, anywhere, any documentation with reasonable information on what settings in the xorg.conf and radeon manpages no longer apply in xorg.conf with kms, and what the parallel radeon.* kernel commandline options are?

Either updating the manpages, or a separate kms manpage (with suitable SEE ALSO section mentions from existing manpages), would be /wonderful/. Or a kernel Documentation/radeon.txt or kms.txt file. (And, couldn't all the kernel display/graphics related Docs be moved into a display/graphics/video subdir? Seems about time.)

I updated the radeon man page last week to reflect what options are KMS vs. UMS. Grab the latest xf86-video-ati from git master.

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BTW, /should/ a larger aperture work? Given that half of it's AGGART IOMMU, should larger == better?

Bigger isn't necessarily better, it just means more pages can be mapped into the gart. We default to 512 MB on non-AGP systems.

Thanks. Useful information.

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4. dmesg says AGP v3 device in 8x mode. [L]ast I tried,

4x and 8x worked but 1x and 2x were broken.

AGP v3 devices only support 4x and 8x modes.

Now if only that were documented in the manpages... =:^( It does explain why modes below 4x wouldn't work, tho. =:^)

It's not really radeon specific, but it would probably be nice to mention it somewhere.

(In reply to comment #30)

I suggest to close the current one and open a new one - there are actually 2:

• Radeon AGP broken on my system and
• Driver not loading (in PCI mode) because of the ttm_background_bind issue

May even be worth openeing 2 new bugs unless you think they are closely related.

Sure.