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Changing to unlisted screen resolution on Fedora 20.


My monitor's native resolution os 1680x1050.
Fedora core 20, doesn't list such resolution in Display Configuration utility.

So, the task is to forcibly change screen resolution to the native resolution.
Which files, and how should I edit?

Thank you, Dear experts.
Nusrat Nuriyev
Nusrat Nuriyev
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1 Solution
First open a terminal and input:

gtf 1680 1050 60

that will give you a list of values which you can make a note of.

Then run xrandr from your terminal, which will show you your current setup and what output is used. After that you can use xrandr --help which will give you a list of options and syntax you can use with the xrandr command.

You can then use

xrandr --newmode 1680x1050_60 "ValuesFromYourEarlierOutput"
xrandr --addmode "YourOutput" 1680x1050_60
xrandr --output "YourOutput" --mode 1680x1050_60

to add the newmode and change the display to that mode.
Nusrat NuriyevAuthor Commented:
cvt 1680 1050

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# 1680x1050 59.95 Hz (CVT 1.76MA) hsync: 65.29 kHz; pclk: 146.25 MHz
Modeline "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync


Open in new window

Screen 0: minimum 64 x 64, current 1680 x 1050, maximum 32000 x 32000
VBOX0 connected primary 1680x1050+0+0 0mm x 0mm

xrandr --newmode "1680x1050" 146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync

Open in new window

no output means ok

xrandr --addmode VBOX0 "1680x1050"

Open in new window

xrandr --output VBOX0 --mode 1680x1050

Open in new window

Good source to use:
Nusrat NuriyevAuthor Commented:
Coordinated Video Timings (VESA-2003-9) is a standard by VESA which defines the timings of the component video signal. Initially intended for use by computer monitors and video cards, the standard made its way into consumer televisions.

Dear rindi, what do timings mean?
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Nusrat NuriyevAuthor Commented:
1680x1050 (0x1b7)  146.2MHz -HSync +VSync *current
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock   65.3KHz
        v: height 1050 start 1053 end 1059 total 1089           clock   60.0Hz

What does start, end, total mean?
Nusrat NuriyevAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 500 points for rindi's comment #a40294452
Assisted answer: 0 points for Nusrat Nuriyev's comment #a40294798

for the following reason:

Good answer.
Nusrat NuriyevAuthor Commented:
pretty nice description

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