Re: HDMI-DVI converted output to DVI display not working with 177.*
Are you using a laptop? (just speculating, but my problem could be caused due to a laptop also having to support output through a port replicator, perhaps it's confusing the outputs somehow. I do not have a port replicator however so I can't test it.).
Did you notice any difference in output detection on 177.* (separate outputs for dual and single-link that we're not there before)?