MacBook Pro (9,2) Thunderbolt Port does not project mirror image correctly

Scenario:
Using an Apple Mini Display Port to VGA adapter
MacBook Pro (9,2)
Thunderbolt port
Various projectors
Epson 450w
Epson 460
Epson PowerLite 45+
Using Mirroring setting in Display preferences.
Symptoms:
Inserting the Apple Mini Display Port to VGA Adapter (with the projector cable attached) into the Thunderbolt port causes a black scrambled image screen. Switching resoutions does not resolve the issue. One resolution setting came close to being viewable, but multiple images of desktop were seen.
Resolution (for me and maybe you):
Attempted multiple Thunderbolt software updates and FW updates, no success (http://support.apple.com/kb/HT5219). Successful: Prior to startup, insert Apple Mini Display Port to VGA Adapter (with the projector cable attached) into the Thunderbolt port, do a PRAM reset, adjust resolutions to your preference. Should work. Only tested with Apple branded Mini Display Port to VGA Adapter.

The solution worked.

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MacBook Pro (9,2) Thunderbolt Port does not project mirror image correctly

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