Linux drivers won't allow 1680x1050. How come?

[iwanttoread]

Hi, running a 4850 with Ubuntu, the proprietary drivers only go up to 1600x1200 and there's no 1680x1050.

Thanks.

[Barrichello]

Hi, running a 4850 with Ubuntu, the proprietary drivers only go up to 1600x1200 and there's no 1680x1050.

Thanks.

I got 2560x1024 running ok across 2 screens at work, sure i saw the res you mention when configuring it (on Red Hat Ent with basic old ATI card) will double check from work.

[iwanttoread]

Well I got 1600x1200, single monitor. It's not a hardware failure because I have that set up in Windows. I'm using Ubuntu 9.04, what drivers are you using? Everytime I install something else I get this crap. I'm sure your work machine does support that.