Comment 70 for bug 144322

Andy, since the new randr code went in the current driver uses completely different code paths for modesetting, a bisect is only of limited usefulness due to this. I don't believe the new code was properly tested for the interlaced (initial mode) case we need. You need to look at what the old (working) code did when initialising interlaced modes and ensure the current code does the same. I did have a look myself previously but couldn't see what was missing. I'll have another look, as you say it's probably in the timings calcs...