Disabling the Vaio Event Service solves the problem.
This is somewhat non-ideal, because it loses ALL the function key configs, not just the F7 that was interfering with the nVidia settings - but at least it works :) Stupid Sony, putting in software that conflicts with the hardware...
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This is somewhat non-ideal, because it loses ALL the function key configs, not just the F7 that was interfering with the nVidia settings - but at least it works :) Stupid Sony, putting in software that conflicts with the hardware...