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Problems with resolution on 24" Monitor

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  • Problems with resolution on 24" Monitor


    I will try in my best English

    I just got a new 24" Monitor HP w2408h. The native resolution is 1920x1200. My Problem is, that with fglrx I have black borders all around the screen but the Catalyst Control Center says that the resolution is 1920x1200.

    I use (k)ubuntu 8.04 with the fglrx from June. I installed it with the tutorial provided in the phoronix forum. (Of course I changed some commands for hardy)

    When I use radeonhd everything is fine, correct resolution and everything.

    I use a RadeonHD 2600Pro.

    here my xrandr outputs.

    Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 1920 x 1200
    default connected 1920x1200+0+0 0mm x 0mm
       1920x1200      60.0*
       1920x1080      60.0     50.0     30.0     25.0
       1776x1000      60.0     30.0
       1680x1050      60.0
       1600x1200      75.0     60.0
       1440x900       60.0
       1400x1050      60.0
       1280x1024      85.0     75.0     70.0     60.0
       1280x960       60.0
       1280x768       60.0
       1280x720       60.0     50.0
       1152x864       85.0     60.0
       1152x648       60.0
       1024x768       85.0     75.0     72.0     70.0     60.0
       800x600        85.0     75.0     72.0     70.0     60.0     56.0
       720x960        30.0
       720x576        50.0
       720x480        60.0
       640x480        85.0     75.0     72.0     60.0
       640x432        60.0
       640x400        60.0
       512x384        60.0
       400x300        60.0
       320x240        60.0
       320x200        60.0

    Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 1920 x 1920
    DVI-I_1/digital connected 1920x1200+0+0 518mm x 324mm
       1920x1200      60.0*+   59.9
       1600x1200      59.9
       1680x1050      59.9
       1600x1000      59.9
       1280x1024      75.0
       1440x900       60.0
       1280x960       59.9
       1152x864       75.0
       1280x720       59.9
       1024x768       75.1     60.0
       832x624        74.6
       800x600        75.0     60.3
       640x480        75.0     60.0
       720x400        70.1
    DVI-I_1/analog disconnected
    (null) disconnected
    DVI-I_2/digital disconnected
    DVI-I_2/analog disconnected
    I really need the proprietary driver. You know, 3D, Xv etc. etc.

  • #2
    Try the instructions in Matthew's post :

    Probably worth reading the whole thread to understand earlier solutions and common typos.

    BTW the issue is that many TV/monitor displays have a default "overscan" setting which is fine for TV but really bad for a monitor since you can't see important little things like the menu bar. The driver defaults to a "safe" zoomed out display on HDMI-attached HD TVs to make sure that you can see the entire screen even if the TV defaults are set to overscan, but for now you need to run an aticonfig command to get rid of the safe mode.

    EDIT - in the interest of efficiency, here is Matthew's post

    Originally posted by mtippett View Post
    We asked some questions internally, it looks like a default setting for HDMI was changed in the common code. This has triggered a number of monitors to underscan.

    Note that this does not happen on all HDTV monitors, some actually need this setting to have a normal near-pixel perfect screen.

    To override this setting try setting this value and restarting X.

    aticonfig --set-pcs-val=MCIL,DigitalHDTVDefaultUnderscan,0

    To enable this functionality through the configuration tools it will not come for a number of releases, since this setting is quite deep under the covers and there are other issues that will need to be resolved to fix this fully.

    Please advise if this resolves this issue.
    Last edited by bridgman; 07-18-2008, 07:40 PM.


    • #3
      Hello bridgman,

      thank you very much!