My computer model is Dell Studio 1555: Pentium Dual Core T4300(2.1GHz,800MHz,1MB), 4096MB 800MHz DDR2 Dual Channel, 512 MB ATI Mobility RADEON HD 4570 using the ATI proprietary driver. My screen resolution is 1366x768 (16:9). This problem has been identified on Ubuntu 11.10 and 12.04

I recently acquired an LG - L203WT monitor but I've found that I can't get the maximum resolution out of it - 1680x1050, which is 16:10 ratio.

The settings in Display show the maximum resolution I can achieve as 1440x900 enter image description here

This is also shown in AMD Catalyst Control Centre enter image description here

The resolution has to be be 16:10 ratio for it to work, so choosing a 16:9 resolution doesn't work.

As I'm using the proprietary driver using xrandr wont work, so is there any other way to get the maximum resolution of 1680x1050 with the fglrx driver?

  • The question still applies as no solution has been given. I've supplied all the details of my computer hardware and software, so I'm not sure what else I can give Dec 29, 2012 at 15:11
  • if you didn't know before, that's an autogenerated, generalized comment. Anyway, I answered your question - in the most reasonable way I could think of - but it seems like you cannot find the solution you want. Some things just cannot be done.
    – RolandiXor
    Dec 29, 2012 at 15:53
  • It would appear so. Thanks for giving the most correct answer! Dec 29, 2012 at 21:30

1 Answer 1


It is likely that the reason you cannot achieve this resolution on the external monitor is because the card does not support it.

Most graphics cards only support a certain number of possible resolutions and combinations, so with two monitors, the card probably cannot push the resolution you are trying to achieve. It is also possible that this is a driver related issue, as proprietary drivers normally limit the resolution options to something that is safe for the card.

You might be able to achieve a lower resolution that works with your monitor (such as 1400x1050), but not the maximum supported by the monitor.

  • I could achieve 1080P fine on two monitors until I upgraded to 13.04... Now I'm lucky to get a GUI at all, and when I do then its limited to 1600x1200! Do you know of any solution to the problem, given that most modern graphics cards can happily drive 3x1200P monitors? Aug 8, 2013 at 14:26
  • @MarkKCowan I suggest asking a separate question.
    – RolandiXor
    Aug 8, 2013 at 17:59

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