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Thread: HOW-TO: Fix Your Monitor Refresh Rate

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  1. #1
    Join Date
    Sep 2005
    Beans
    71
    Distro
    Ubuntu Breezy 5.10

    Post HOW-TO: Fix Your Monitor Refresh Rate

    This How-to is for people who want to change the refresh rate and/or resolution for their monitor

    **i have only tried this on nvidia cards

    **use this info at your own risk, i will take no responsibility for damaged hardware

    First we want to get the modeline for our desired resolution and refresh rate, to do this we head to www.sh.nu/nvidia/gtf.php

    At the top of the page is a table, input the settings you want into it, for example, i want to run my monitor @ 1280x1024 85refresh rate, so i enter into the first box marked X: 1280 in the second box marked y: i enter 1024 and the 3rd box i enter 85 (my desired refresh rate)

    then i click the Generate modeline button and the output is as follows:
    # 1280x1024 @ 85.00 Hz (GTF) hsync: 91.38 kHz; pclk: 159.36 MHz
    Modeline "1280x1024_85.00" 159.36 1280 1376 1512 1744 1024 1025 1028 1075 -HSync +Vsync

    open a new terminal and type the following:
    sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup
    sudo gedit /etc/X11/xorg.conf

    in the xorg.conf document find:

    Section "Monitor"

    and at the bottom of this section copy and paste the modeline you got from the website you visited, mine looks like this:

    Section "Monitor"
    Identifier "Generic Monitor"
    Option "DPMS"
    Modeline "1280x1024_85.00" 159.36 1280 1376 1512 1744 1024 1025 1028 1075 -HSync +Vsync
    EndSection

    now save the file and restart x by pressing ctrl alt and backspace

    if it takes you to a command prompt just log in and type startx

    your monitor should now be running at your chosen settings

    note: this is my first how-to so i would appreciate any feedback on it from you experts, i am still a linux newb but this is a small problem i managed to figure out and hope it can help others like the community has helped me.

  2. #2
    Join Date
    Jul 2005
    Beans
    22

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    Thanx for this Howto!!
    I already fixed this "problem" on my monitor though, but it was hard to find the correct vertsync and that for my monitor.

    But in the future I will use this howto if i need it, and i probably will.

  3. #3
    Join Date
    Mar 2005
    Beans
    8
    Distro
    Ubuntu Breezy 5.10

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    if you have a Dell 2005FPW with the nvidia drivers that is refusing to work at 1680x1050 try this modeline:
    Code:
    ModeLine "1680x1050" 119.0 1680 1728 1760 1840 1050 1053 1059 1080
    works great for me.

  4. #4
    Join Date
    Jul 2005
    Beans
    5
    Distro
    Ubuntu Breezy 5.10

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    hmm, doesn't seem to do anything to mine...

  5. #5
    Join Date
    Oct 2005
    Beans
    1

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    I found a very simple method to change the resolution. All you need to do is open up the Terminal, and enter:
    sudo gedit /etc/X11/xorg.conf

    Then, find the section that says:

    "Screen"
    Identifier "Default Screen"
    Device "NVIDIA Corporation NV18 [GeForce4 MX 440 AGP 8x]"
    Monitor "LJD 7VlrSB"
    DefaultDepth 24
    SubSection "Display"
    Depth 1
    Modes "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
    Depth 4
    Modes "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
    Depth 8
    Modes "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
    Depth 15
    Modes "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
    Depth 16
    Modes "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
    Depth 24
    Modes "1152x864" "1024x768" "800x600" "640x480"

    .. And edit the one that says " Depth 24" I am assuming that's 24-bit colour depth. I just put in my resolution "1152x864" and saved the modifications. After I rebooted, it allowed me to select the resolution in the Resolution box. Hopefully this will help people who cannot get the above method working.

  6. #6
    Join Date
    Oct 2005
    Location
    São Paulo, Brazil
    Beans
    86
    Distro
    Ubuntu 7.04 Feisty Fawn

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    Thank you Samuel. Great howto!

  7. #7
    Join Date
    May 2006
    Location
    United Kingdom
    Beans
    3
    Distro
    Ubuntu Breezy 5.10

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    Quote Originally Posted by Samuel
    This How-to is for people who want to change the refresh rate and/or resolution for their monitor

    **i have only tried this on nvidia cards

    **use this info at your own risk, i will take no responsibility for damaged hardware

    First we want to get the modeline for our desired resolution and refresh rate, to do this we head to www.sh.nu/nvidia/gtf.php

    At the top of the page is a table, input the settings you want into it, for example, i want to run my monitor @ 1280x1024 85refresh rate, so i enter into the first box marked X: 1280 in the second box marked y: i enter 1024 and the 3rd box i enter 85 (my desired refresh rate)

    then i click the Generate modeline button and the output is as follows:
    # 1280x1024 @ 85.00 Hz (GTF) hsync: 91.38 kHz; pclk: 159.36 MHz
    Modeline "1280x1024_85.00" 159.36 1280 1376 1512 1744 1024 1025 1028 1075 -HSync +Vsync

    open a new terminal and type the following:
    sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup
    sudo gedit /etc/X11/xorg.conf

    in the xorg.conf document find:

    Section "Monitor"

    and at the bottom of this section copy and paste the modeline you got from the website you visited, mine looks like this:

    Section "Monitor"
    Identifier "Generic Monitor"
    Option "DPMS"
    Modeline "1280x1024_85.00" 159.36 1280 1376 1512 1744 1024 1025 1028 1075 -HSync +Vsync
    EndSection

    now save the file and restart x by pressing ctrl alt and backspace

    if it takes you to a command prompt just log in and type startx

    your monitor should now be running at your chosen settings

    note: this is my first how-to so i would appreciate any feedback on it from you experts, i am still a linux newb but this is a small problem i managed to figure out and hope it can help others like the community has helped me.
    I followed your instructions and produced an outcome that looked like yours, but now the os doesn't work.... I got some blue screens and some messages about things not being set-up correctly...

    God this was sooo much easier in Windows...

    Now the OS wont start up at alll!! I made a back-up of the file like you said, but it doesn't seem to have helped any... I keep getting these blue screens with error messages on saying that the X server failed to start my graphical interface..? It asks if I want to view the server output, but the output means nothing to me, so I can't diagnose anything and even if I could I would know how to fix anything!

    Do I have to reinstall the whole OS again, or is there another solution..?

    ------------------------------------------------------------------------------------------
    EDIT: Don't bother, I'm not going to wait for a responce, I'll just try to re-install the OS again... If it breaks next time I try this fix I think I'll just install Win2k again... I guess Linux isn't for everybody...
    ------------------------------------------------------------------------------------------
    Last edited by grandiose; May 5th, 2006 at 08:40 AM.

  8. #8
    Join Date
    Oct 2007
    Beans
    2

    Question Re: HOW-TO: Fix Your Monitor Refresh Rate

    Thank you wolfchri!!!
    Now I can at least use a refresh rate of 75.
    But I found it realy strange that some of the options that used to work at windows don't seem to work at linux.
    Is there anyway to install a monitor driver?
    Last edited by janub; October 3rd, 2007 at 01:05 PM. Reason: Found the answer!

  9. #9
    Join Date
    May 2007
    Location
    Maine
    Beans
    51
    Distro
    Ubuntu 7.04 Feisty Fawn

    Re: HOW-TO: Fix Your Monitor Refresh Rate

    I've upgraded to the latest Ubuntu and had this slight quiver in the edges.
    I changed the refresh rate to see if this would help. This was a disastrous choice. I got an out of range blue screen and no way to default. I'm now logged in under another user because mine will just give me the blue out of range screen. Nice job H.B.

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