LinuxQuestions.org - My screen is flickering in X

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My screen is flickering in X

My screen has a slight flicker that is giving me a headache. Do I need to change the settings in the xorg.conf? Here is what I have right now.

Code:

Section "Monitor"

        #DisplaySize      320  240    # mm

        Identifier  "Monitor0"

        VendorName  "STN"

        ModelName    "S/T 76/77V"

        HorizSync    30.0 - 70.0

        VertRefresh  50.0 - 160.0

        Option      "DPMS"

EndSection

Would raising the VertRefresh setting get rid of this fliker? If so, what should I change it to?

You need to set your HorizSync rate and your VertRefresh rate according to your monitors specs. You can get those specs off of your monitors install disk or owners manual. If you do not have either of these sources you could try to google your monitors make and model to get those specs. Edit the configuration file with the correct ranges and this should fix your problem.

Regards.

A flicker can also be caused by an electro-magnetic field in close proximity to the screen (CRT) this causes beams to bend towards or away from the field. Common example is a fairly strong speaker or some kind of motor.

I looked up the specs for the monitor and found that the sync and refresh rates are correct. I also found that the manufacturer suggests a 1024x768 85Hz setting. I changed to that in KDE and it works great. The screen is a bit smaller, but I can deal with that. Now how do I make the changes permanent for all X sessions? Here is my xorg.conf settings right now.

Code:

Section "Screen"

        Identifier "Screen0"

        Device    "Card0"

        Monitor    "Monitor0"

        SubSection "Display"

                Viewport  0 0

                Depth    1

        EndSubSection

        SubSection "Display"

                Viewport  0 0

                Depth    4

        EndSubSection

        SubSection "Display"

                Viewport  0 0

                Depth    8

        EndSubSection

        SubSection "Display"

                Viewport  0 0

                Depth    15

        EndSubSection

I don't understand what the Viewport setting is or why it is always set to 0 0. It isn't in the xorg.conf.example file. I also don't see anything about the resolution. Should I just add it in there? That seems a bit dangerous since I don't know what I am doing.