Re: [SLE] Monitor refresh problem

From: Rohit (rohits_at_mahindrabt.com)
Date: 12/23/03

  • Next message: Catimimi: "RE: [SLE] 2.6 kernal" 
    Date: Tue, 23 Dec 2003 17:15:24 +0000
To: suse-linux-e@suse.com

    Eric wrote:

    >If you;re using KDE goto the control panel and under periphereals, and then
    >monitor, you can select resolution and refresh rate.
    >
    >
    I shall try that, Eric. Thanks for replying. But it gets interesting, so
    please [all] see below.

    >>So I go to SuSE and faithfully replace the monitor's specs in my
    >>XF86Config. Out goes the old Samsung 55E and enter IIyama refresh rates.
    >>Officially it is supposed to be able to do 1600x1200 at 75 MHz and
    >>1280x1024 at 85 Hz and I know from experience that it works at 100Hz for
    >>lower res. I start X. After a little bit of pain, I see 60 Hz. No matter
    >>what res, I see 60 Hz.
    >>
    >>
    > See above. Maybe the resolution and HZ config lines must be corect in XF86
    >config to do it this way, but im not sure. You should be able to pick
    >anything you put in your xf86config.
    >
    >
    I assure that the lines are correct and a lot of hard work has gone into
    estimating whether the lines were wrong. It seems that the lines are not
    being picked up.

    >>The log of X server tells that many modes are rejected, because of
    >>graphics card's memory bandwidth being too less. I kow that my GeForce2
    >>MX [on board Asus A7N266 VM, sharing DDR RAM for video purposes] is fast
    >>enough. Should there be a problem?
    >>
    >>
    >Nah, its normal too see many mode rejections in the log file, as long as the
    >ones you SPECIFIED in the XF86 config file work, I wouldnt worry about what
    >the log tells you.
    >
    >
    Probably. But I am skeptical here. I know that the lines are being
    rejected all over the world, but what I suspect here is this. The
    modelines that I specified, are not being used at all. I used a website
    [actually two] that BandiPat [on this list] showed to me. Calculated the
    modelines which would be valid for my system and actually put them
    inside the file. They are all rejected saying that "Rejecting mode
    because it is not supported by the card's memory bandwidth".

    So my take is that X server is assuming low-duty for my card. There are
    lines rejected for other reasons, which is fine with me - but suppose I
    wish to force my Xserver to NOT calculate modes on its own, and rather
    use one of my supplied lines, how can I do that? Because I know that my
    card can take all that load. In this case I am particularly worried -
    there just needs to be a way for me to override the value of pixel clock
    /RAMDAC for my card.

    There is one thing, seems that this monitor is nod EDID compliant, seems
    that it can not send its own info to both Linux and Windows OS probes
    [Sax2 included]. So I think I need methods to specify the parameters
    like these [related to my hardware and monitor] into the XF86Config file
    itself. I also feel I need to override the X server's deductions about
    my hardware.

    All ye men, contribute wholeheartedly. 

    --
SDE, MBT, 52 Barrack SQ, Martlesham Heath, Ipswich, Suffolk, UK
1473 667138 rohit.sharma@iitbombay.org rohitibsharma@yahoo.com
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