Not getting the highest resolution on my screen

Posted on 2005-04-24
Last Modified: 2013-12-06
I'm using a ViewSonic VP201b with a radeon 9600 xt 128 mb ddr Adapter.  I booted fine and changed my resolution
to 1600 by 1200, but the screen goes black and I have to go into terminal mode, edit /usr/X11/xorg.conf changing
to a lower resolution to get going.  It's a dual boot system and this monitor and adapter give flawless 1600 by 1200
under windows.  How can I get the same resolution under Fedora core 3?

Thanks in advance...
Question by:padmasambhava
    LVL 23

    Expert Comment

    Have you made sure to set the refresh rates, Vertical Refresh, Horizontal Sync
    correctly, according to the monitor's specs?

    Do you have a device section for the display adapter, and have you ensured the
    driver and settings are correct?
    LVL 38

    Accepted Solution

    > radeon 9600 xt 128 mb ddr Adapter
    > same resolution under Fedora core 3?
    You need to looad the right video driver. As root, run
    And select the right monitor (ViewSonic VP201b) and the video card (ATI Radeon 9600).
    If you do have the right driver, then you can not go to the highest resolution.
    Go to ATI
    and download
    rpm -ivh fglrx_6_8_0-8.12.10-1.i386.rpm

    Also, check the release note:


    Author Comment

    I've set it up for the monitor and adapter, all that looks fine.  I've also upgraded to the latest driver.  xorg.conf has the correct settings for horizontal and vertical freqs.  The only thing I see missing is the refresh rate should be 60, but I don't know how to specify it.
    LVL 23

    Assisted Solution

    Overall refresh rate is given  as a range

    VertRefresh xxx-yyy
    HorizSync xxx-yyy

    Also, in the Mode or ModeLine directive for each resolution,
    there are other parameters that go with every resolution...

    dot clock, horizontal sync timings, and vertical sync timings, and
    options like Interlaced,  DoubleScan... polarities...

    see    man xorg.conf

    LVL 38

    Expert Comment

    From the specification of ViewSonic VP201b:
    In xorg.conf, your monitor should be
    HorizSync  30.0 - 92.0
    VertRefresh 50.0 - 85.0

    Author Comment

    That's what I've got there.  Do you know of any problems with that driver?  I updated it from the viewsonic
    site and it seemed to work.  But I'm enough of a newbie at linux that I'm not sure.  How can I check the
    version number on it?

    LVL 38

    Expert Comment

    > How can I check the version number on it?
    What version number do you mean?

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