Sounds like either OSX or Catalyst is not liking the fact that there is no EDID happening on your GFX card on startup.
Have you tried connecting a DVI Parrot or Detective to see if "faking" out the video card solves the issue?
Hope this helps.
Sounds like either OSX or Catalyst is not liking the fact that there is no EDID happening on your GFX card on startup.
Have you tried connecting a DVI Parrot or Detective to see if "faking" out the video card solves the issue?
Hope this helps.
Best Regards,
- Marty