Regression: black screen on VGA w/ nouveau in Linux 3.3

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Hi folks,

Just upgraded to Linux 3.3 on my desktop and noticed that the VGA output
on my card w/ nouveau is totally black (both at the console and in X).
Almost everything appears to work normally: DPMS works, modesetting
works, DDC works... all messages indicate that things are working --
just the image is completely black.

The VGA is one of two outputs in use: the other (DVI) output works
normally.  The card also has an unused TV-out port, FWIW.

The card is an NV36 generation (Geforce FX5700 AGP).  This is a
regression from Linux 3.2 -- unfortunately, bisection has proved
extremely difficult because the intermediate kernels git is asking me
to test panic immediately on boot (and compiling Linux takes a fairly
long time on this box too).  The failed attempt went like this:

  git bisect start 'drivers/gpu'
  # bad: [c16fa4f2ad19908a47c63d8fa436a1178438c7e7] Linux 3.3
  git bisect bad c16fa4f2ad19908a47c63d8fa436a1178438c7e7
  # good: [805a6af8dba5dfdd35ec35dc52ec0122400b2610] Linux 3.2
  git bisect good 805a6af8dba5dfdd35ec35dc52ec0122400b2610
  # skip: [5d56fe5fd794a98c4f446f8665fd06b82e93ff64] Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-core-next
  git bisect skip 5d56fe5fd794a98c4f446f8665fd06b82e93ff64
  # good: [dffc9ceb55695f121adc57dd1fde7304c3afe81e] gma500: kill virtual mapping support
  git bisect good dffc9ceb55695f121adc57dd1fde7304c3afe81e
  # skip: [5c2a5ce689c99037771a6c110374461781a6f042] drm: add missing exports for i810 driver.
  git bisect skip 5c2a5ce689c99037771a6c110374461781a6f042
  # skip: [44517c44496062180a6376cc704b33129441ce60] drm/radeon/kms: Add an MSI quirk for Dell RS690
  git bisect skip 44517c44496062180a6376cc704b33129441ce60

  (I stopped at this point)

I'm running the latest git xf86-video-nouveau, but since the issue
occurs at the console it's probably not too important...

Let me know if you need any more info,
-- 
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)

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