Re: [260.19.0x Geforce 310M] Cannot read VAIO EDID (both with and without CustomEDID)
That sounds like a different issue, then. Can you SSH into the computer? If so, please try running X over SSH with "startx -- -logverbose 6" both with your custom configuration, and with the ConnectedMonitor and CustomEDID options removed, generating an nvidia-bug-report.log.gz for each scenario, and then attach both of them to your reply.
I filed a bug about CustomEDID using mmap(), and we'll change it back to read() in a future release.