[Nouveau] [Bug 20341] [NV31] lockup when using AGP. agpmode=0 fixes it.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=20341

--- Comment #25 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 87854
  --> https://bugs.freedesktop.org/attachment.cgi?id=87854&action=edit
quirk patch

Could you try this patch -- it adds a quirk to limit the mode to 2 for your
particular configuration. This is similar to the quirks that the radeon driver
uses, and was recommended to me as the proper way forward. (Unfortunately, it
seems like *combinations* of chipset/card are the issue, not just the chipset
on its own.)

I guessed about your chipset id, if it doesn't trigger, please attach the
output of lspci -vnn (I'd like to see it for both the chipset and your card).

You should see a print like

Setting agp speed to 2X. Use agpmode to override.

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