The "really stretched out" part of Johan's report can probably be addressed via a setting in the monitor. (I assume Johan has one of those new Dell monitors, like the one I have.) Go to the "display settings" and set the "wide mode" to "1:1". That will give you the proper aspect ratio (and will also make it extremely obvious that you aren't using the entire screen!).
I almost got to 1680x1050 by using the "915resolution" program. I set MODE=30, XRESO=1680, YRESO=1050, and BIT=24. After restarting, I can now set 1680x1050 as a screen resolution. Unfortunately, when I do this, I still only see 1280x1024 on the screen. I no longer see the entire desktop -- the left and right edges are chopped off. I'm attaching a file with "diff -u" output, showing what happened when I selected a screen resolution of 1680x1050, then rejected the new resolution and went back to 1280x1024. ** Attachment added: "Xorg.0.log output from changing resolution to 1680x1050 and back to 1280x1024" http://librarian.launchpad.net/6894807/Xorg.log.diff -- 1280x1024 resolution on 1680x1050 monitor https://launchpad.net/bugs/83934 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs