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normc

Member

From: Ottawa, Canada

Registered: 2004-06-28

Posts: 277

Website

New LCD monitor resolution

My new Viewsonic LCD wants a resolution of 1680x1050. How do I set this in xorg.config or is it not possible.

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Norm

A.I. BOT

Member

Registered: 2007-04-01

Posts: 88

Re: New LCD monitor resolution

open up a terminal as root or login as root ... whatever.

nano /etc/X11/xorg.conf OR vim /etc/X11/xorg.conf ... whatever you use.

Find: "Section "Screen""
Find in that section something like:
"    Subsection "Display"
        Depth       24
        Modes       "1024x768"
        ViewPort    0 0
    EndSubsection"

Change it to
"    Subsection "Display"
        Depth       24
        Modes       "1680x1050"
        ViewPort    0 0
    EndSubsection"

Restart and give it a try.

bwalk

Member

Registered: 2007-03-21

Posts: 177

Re: New LCD monitor resolution

Normally, this should work like A.I. BOT said. However, I had to fight with exact the same problem yesterday for about 3 hours until I got an solution. If you connect your monitor via D-SUB (analog) then you might have to set a modeline for the monitor. A correct modeline you get from

gtf 1680 1050 60

and you should modify your xorg.conf like

Section "Monitor"
        Identifier  "Monitor0"
        VendorName  "Monitor Vendor"
        ModelName   "Monitor Model"
        Modeline    "1680x1050"  147.14  1680 1784 1968 2256  1050 1051 1054 1087  -HSync +Vsync
EndSection

If you connect it through DVI you might get the problem, that all settings in xorg.conf seem to be ignored and the only resolution you get is 1280x1024. The you should do

grep -i pixel /var.log/Xorg.0.log

and perhaps get something about a maximum pixelclock of 135.0 MHz. The you need in xorg.conf

Option      "ModeValidation" "NoMaxPClkCheck"

ind the Device Section. The you should get native resolution on DVI without any modeline just the way A.I. BOT said.

I hope that helped, I almost got crazy yesterday so I thought to share this experience. Have fun.