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Need help with Parhelia to support non-VESA standard resolution for IBM T221

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  • Need help with Parhelia to support non-VESA standard resolution for IBM T221

    Hi? I have recently purchased IBM T221 Monitor which supports resolution of 3840 x 2400.

    However, I had trouble running this resolution with my Matrox Parhelia.

    IBM T221 LCD supports 3840 x 2400 using 1, 2, or 4 DVI's.
    For 1 DVI, it supports 3840 x 2400 at 11Hz Refresh, for 2 DVI's it supports at 25Hz, and with 4 DVI's at 41Hz.

    So far I have tested this monitor with ATI Fire GL4 128MB AGP, ATI Radeon 9700 Pro, and Matrox Parhelia 128MB AGP card.

    With Fire GL4, using 2 DVI's, it did support the resolution at 25Hz, which didn't bother me at all, but its poor video overlay performance made me give up.

    And with Radeon 9700 Pro, it supports 3840 x 2400 using only 1 DVI, but its 11Hz refresh rate is unuasable.

    So I tested with Matrox Parhelia Graphic Card, but 3840 x 2400 was not achievable.

    In order to support 3840 x 2400 mode, each DVI has to support 1920 x 2400 resolution, which by the way is not VESA standard.

    Is there any way I can make my Parhelia to support 3840 x 2400 using 2 DVI's? Each with 1920 x 2400?

    The driver doesn't show its option, but I don't see any reason why it couldn't be supported.

    Maybe all I need is some driver modification trick to allow parhelia to support 3840 x 2400.

    Thanks in advance for your help.

    Sang

  • #2
    IIRC the matrox tweak util allows custom resolution, no?
    P4 Northwood 1.8GHz@2.7GHz 1.65V Albatron PX845PEV Pro
    Running two Dell 2005FPW 20" Widescreen LCD
    And of course, Matrox Parhelia | My Matrox histroy: Mill-I, Mill-II, Mystique, G400, Parhelia

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