Suspend/resume/suspend broken in Linux 3.5-rc5

[Sven Joachim]

Hi,

I'm sorry having to report that I'm only able to suspend once with Linux
3.5-rc5; any subsequent attempts fail.  This is a regression from 3.4
where suspend/resume worked flawlessly and arbitrarily often on my
machine.

Bisection show that the problem was introduced in commit c420b2dc8dc:

,----
| commit c420b2dc8dc3cdd507214f4df5c5f96f08812cbe
| Author: Ben Skeggs <bskeggs@xxxxxxxxxx>
| Date:   Tue May 1 20:48:08 2012 +1000
| 
|     drm/nouveau/fifo: turn all fifo modules into engine modules
|     
|     Been tested on each major revision that's relevant here, but I'm sure there
|     are still bugs waiting to be ironed out.
|     
|     This is a *very* invasive change.
|     
|     There's a couple of pieces left that I don't like much (eg. other engines
|     using fifo_priv for the channel count), but that's an artefact of there
|     being a master channel list still.  This is changing, slowly.
|     
|     Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
`----

My graphics cards is the following:

VGA compatible controller: NVIDIA Corporation G86 [GeForce 8500 GT] (rev a1)

Any advice would be appreciated.

Cheers,
       Sven
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