[Nouveau] Latest Git still freezes AGP [GeForce 7600 GS]

[Roger]

On Sat, Jan 08, 2011 at 04:27:47PM -0900, rogerx.oss at gmail.com wrote:
>On Sat, Jan 08, 2011 at 02:41:55PM -0900, Roger wrote:
>>
>>Just a ping here concerning the "nVidia Corporation G73 [GeForce 7600 GS]" and
>>AGP issues.
>>
>>
>>I still have to use agpmode=0 (aka kernel parameter nouveau.agpmode=0) to
>>avoid kernel (framebuffer) freezes when loading drm/nouveau drivers.
>>
>>
>>My next task will be to get KDB working to hopefully get a backtrace.  Or is it
>>futile at this point?  Using KGDB, I think stalls the serial bus and, the info
>>I earlier collected showed nothing relevant to this or to any indication of a
>>kernel panic.
>
>(I meant KDUMP instead of KDB within the above paragraph.)
>
>
>Interesting. I've recompiled this kernel to include the drm & nouveau as
>modules.  (I also added KDUMP along with RELOC.)  The modules seem to be
>loading and activating framebuffer console mode now without freezing, while
>also enabling AGP mode.
>
>I was anticipating to use/activate KDUMP dump kernel after loading the drm &
>nouveau modules which trigger the freeze when AGP is enabled.
>
>Seems like this bug is halfway worked out?

I've gone back to recent stable kernel release 2.6.37 that I just installed,
and verify that compiling the in-kernel nouveau as module does allow AGP mode
to work.  I do believe however, 2.6.37 statically linked nouveau driver will
freeze framebuffer when trying to use AGP mode.

To me, this is really starting to sound more like a timing issue between the
"Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge" and
nouveau?

(FYI: drm is still being compiled statically. Just nouveau requires to be
compiled as module to evade AGP issues.)

-- 
Roger
http://rogerx.freeshell.org/