Re: No video after driver installed
Are you still seeing the same failure to detect displays in the X log after configuring both GPUs? Could you generate another nvidia-bug-report.log with this configuration?
What displays are you using? Do you still get the same problem if you have a smaller number of displays connected? Could you provide EDIDs for your displays? (An easy way to get EDIDs is to start X with the vesa driver; the vesa driver will dump the EDIDs into the X log.)