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In my monitor it says "Out of Range" black screen. Where i need to set the VGA output resolution to 1024x768 having 60hz or 70hz.

Here is the following lines i have tried but it fails.

    $ cvt 1024 768
    $ xrandr --newmode shvga 74.50 1024 1072 1176 1328  768 771 775 798
    $ xrandr --addmode VGA-1 shvga
    $ xrandr --output VGA-1 --mode shvga

Follow up: SOLVED

1) how do to i tell penguin, please set my refresh rate to 60 or 70 ro 70.1?
$ xrandr --output VGA-1 --mode shvga --rate 70.1

or

$ cvt 1024 768 70.1
# 1024x768 70.04 Hz (CVT) hsync: 56.18 kHz; pclk: 75.50 MHz
Modeline "1024x768_70.10"   75.50  1024 1080 1184 1344  768 771 775 802 -hsync +vsync 

$ xrandr --newmode shvga 75.50  1024 1080 1184 1344  768 771 775 802 -hsync +vsync
                         |
                         ^ 
                         This is not reliable 
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1 Answer 1

up vote 1 down vote accepted

Make sure you're using a frequency that's actually supported by your monitor, as it is the frequency that is often "Out of Range". Finding a tech sheet for the monitor (usually on the OEM's site) should give you the required information.

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i am doing that. Mostly the ranges that works are 60 to 70hz. And in my line of code, i have assigned that but it fails. –  YumYumYum Nov 24 '12 at 11:41

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