Originally Posted by penguintree
Well I now have the Sapphire Active DisplayPort to Dual-Link DVI Adapter, and would love to say whether it's any good or not, but whilst I do have a 2560x1920 DVI monitor requiring Dual Link feed, I don't yet have my M6500 (or any other DisplayPort device) handy so it'll have to wait until it arrives.
OK, I have the M6500 (for a few days now) but I can't quite get the Dell 3007WFP to work with it. The screen displays correctly for a couple of seconds at a time, but flashes on and off continually, and occasionally loses sync altogether. The screen has no adjustments, except backlight intensity, and no other inputs so there's nowhere to go from that end. The screen is recognised correctly through the adapter, either on the dock's displayport inputs or directly into the laptop's one.
There's a possibility some or all of the problem is down to the ATI M7740 card as the laptop screen flashes similarly for quite a while, whilst the screens are identifying. The firmware and drivers I think are up to date. Most likely it's the adapter though, which is incidentally just a Bizlink rebadged as Sapphire - they didn't even bother to take the Bizlink stickers off; it's the Bizlink BZL-KS10008(B). It should be firmware upgradeable, but I can't find firmware for it although the ATI compatibility list has the firmware at 1.01 (and the identical Accell product - they're all the same thing). It's almost there, but so frustratingly unusable. One of the justifications for spending so much on the laptop was as a desktop replacement - if it can't drive the 30" display, it's no desktop replacement for me.