I have 2 oldish 23inch Samsung's connected to the DVI ports and a Samsung S27A950 connected to the DisplayPort. With the old (out of the box) BIOS, it would boot into Windows fine, all monitors active.... after the BIOS upgrade (P8847 / 80.04.4B.00.AS09), my DisplayPort monitor, which is my main one, doesn't turn on until I log into Windows and re-enable it after each boot... extremely annoying. Can't access the PC BIOS or boot screens on this monitor anymore either.
If I unplug one of the DVI monitors, the remaining DVI and the DisplayPort monitors work in dual monitor mode as expected, but with three going, this BIOS update has ruined things. Spent a couple of hours trying to fix this, with no luck. Since it's screwed up the monitor working in the PC BIOS too, I'm convinced it's a result of the video BIOS upgrade.
I'd love to flash the old firmware back on, even if it means losing the performance improvement, but can't seem to find a copy on the web and can't locate where it autobacked up it to on my HDD. Does anyone have a copy? (version P8193)