Using intel_reg_dumper, the suggestions in this discussion, and a bit of
poking around, I've attempted to harmonize the output from
intel_reg_dumper between the plain no-frame-buffer output, and the
intelfb using KMS.

Specifically I'm using the drm-intel-fixes branch of the current version
of drm-intel, and have applied the two suggestions in this thread, and
reverted commit 12e8ba25ef52f19e7a42e61aecb3c1fef83b2a82.

None of this has caused any change in behavior which I've noticed, but
the diff of the intel_reg_dumper output is getting fairly small and
perhaps someone who actually has some idea what they are doing can find
some insight in it.

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Title:
  [i915] Lenovo U160 Intel i7 620UM blank screen

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