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Thread: Cannot change screen resolution 800X600

  1. #1
    Join Date
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    Ubuntu 12.10 Quantal Quetzal

    Cannot change screen resolution 800X600

    Hello all,

    I have a desktop AMD processor, Nvidia graphic card computer with Ubuntu 12.10.
    I was having many problems such as no flash video from youtube, very slow computer mainly when browsing the Internet.

    I searched the net and came to the conclusion it might be a graphic drivers problem, so I installed the Nvidia Drivers.
    But the result is now a desktop with a resolution of 800 X 600 which I cannot change.
    Uninstalling the Nvidia drivers did not help, nor it helped to install linux-headers-generic, linux-source.

    My Xorg.conf file has an entry Section Monitor whre the HorizYnc is set to 28.0 - 33.0 and a HorizSync set to 43.0 - 72.0

    Under system configuration, under screens it does not detect my monitor, it detects a "Laptop"...

    Any help is welcome, as I have already done many things with no luck.

    Thank you.

    Yoram
    Last edited by yoramdavid; December 29th, 2012 at 01:56 AM.
    Yoram David
    __________________________________________
    We must be the change we want for the world (Ghandi)

  2. #2
    Join Date
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    Re: Cannot change screen resolution 800X600

    I searched on my monitor on the net and found that the "Samsung SyncMaster T220" has a Vertical Refresh Rate 75 Hz and a Horizontal Refresh Rate 81 kHz, so I changed that in the xorg.conf file, restarted the Xserver and now the screen is at 1280 x 1024, a little better but a little distorted.
    It must be another Vertical and Horizontal refresh rate, any body knows how to know that?

    I also tried what this old threat says: http://ubuntuforums.org/showthread.php?t=779038
    But the
    Code:
    % xvidtune -show
    returns the following error:
    Code:
    bash: fg: %: trabalho não existe
    Flash still does not work either by the way.
    Regards and happy festivities to all.
    Yoram David
    __________________________________________
    We must be the change we want for the world (Ghandi)

  3. #3
    Join Date
    Dec 2012
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    Re: Cannot change screen resolution 800X600

    you should make: Control Panel -> Device Manager -> Graphic Cards
    click with right button of your mouse on your graphic card there and choose ' Uninstall driver '.

  4. #4
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    Re: Cannot change screen resolution 800X600

    Quote Originally Posted by gasquangchuyen View Post
    you should make: Control Panel -> Device Manager -> Graphic Cards
    click with right button of your mouse on your graphic card there and choose ' Uninstall driver '.
    Thank you for replying, but that sounds like windows.
    Where do I find that in Ubuntu 12.10?
    Yoram David
    __________________________________________
    We must be the change we want for the world (Ghandi)

  5. #5
    Join Date
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    Ubuntu 14.04 Trusty Tahr

    Re: Cannot change screen resolution 800X600

    Quote Originally Posted by yoramdavid View Post
    Thank you for replying, but that sounds like windows.
    Where do I find that in Ubuntu 12.10?
    You might try typing "Drivers" into the Dash. Open the additional drivers app and see if you can remove any old drivers and install different ones.

    Could also try typing this in terminal...

    Code:
    gksudo amdcccle
    which opens the AMD catalyst control center (if it is installed on your computer).

  6. #6
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    Re: Cannot change screen resolution 800X600

    yoramdavid: You said that your graphics card is an "AMD Nvidia". AMD and Nvidia are two different companies. What graphics card do you have? One or the other? Can you please share the output of these two commands?

    Code:
    lspci -v | grep nvidia
    lspci -v | grep amd
    lspci -v | grep AMD
    Last edited by Drone4four; December 28th, 2012 at 05:34 PM.
    Gigabyte GA-P45T-ES3G LGA 775 Intel P45
    Intel Core 2 Quad Q9650 @3.0GHz
    16GB RAM DDR3 1333MHz
    EVGA nVidia GeForce GTX 560 Ti 2GB

  7. #7
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    Re: Cannot change screen resolution 800X600

    Quote Originally Posted by Drone4four View Post
    yoramdavid: You said that your graphics card is an "AMD Nvidia". AMD and Nvidia are two different companies. What graphics card do you have? One or the other? Can you please share the output of these two commands?

    Code:
    lspci -v | grep nvidia
    lspci -v | grep amd
    lspci -v | grep AMD
    Hello Drone4four, thank you.

    I was not clear, the processor is AMD, the Graphic card is Nvidia.
    I will put the output here of these commands soon.

    Yesterday, I pressed the configuration button on the monitor and I lost connection with it. I tried a different cable and it works, is it coincidence having changed the Vertical Refresh Rate to 75 Hz and a Horizontal Refresh Rate to 81 kHz might have be the cause?
    Yoram David
    __________________________________________
    We must be the change we want for the world (Ghandi)

  8. #8
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    Re: Cannot change screen resolution 800X600

    Tips, tweaks and how-to's for Ubuntu and Mint:
    http://sites.google.com/site/easylinuxtipsproject
    In for a pleasant surprise? Give Xubuntu a try:
    http://sites.google.com/site/easylin...roject/xubuntu

  9. #9
    Join Date
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    Re: Cannot change screen resolution 800X600

    Quote Originally Posted by Petro Dawg View Post
    You might try typing "Drivers" into the Dash. Open the additional drivers app and see if you can remove any old drivers and install different ones.

    Could also try typing this in terminal...

    Code:
    gksudo amdcccle
    which opens the AMD catalyst control center (if it is installed on your computer).
    The above code does nothing, probably due to the confusion of my graphic card not being AMD, but Nvidia.
    Yoram David
    __________________________________________
    We must be the change we want for the world (Ghandi)

  10. #10
    Join Date
    Nov 2005
    Location
    Portugal, Baixo Alentejo
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    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: Cannot change screen resolution 800X600

    Quote Originally Posted by Drone4four View Post
    yoramdavid: You said that your graphics card is an "AMD Nvidia". AMD and Nvidia are two different companies. What graphics card do you have? One or the other? Can you please share the output of these two commands?

    Code:
    lspci -v | grep nvidia
    lspci -v | grep amd
    lspci -v | grep AMD
    Code:
    lspci -v | grep nvidia
    Returns:
    Code:
    lspci -v | grep nvidia
    Kernel driver in use: agpgart-nvidia
    Kernel modules: nvidia_current, nouveau, nvidiafb

    Code:
    lspci -v | grep amd
    returns:
    Code:
    lspci -v | grep amd
    Kernel driver in use: pata_amd
    Kernel modules: pata_amd

    Code:
    lspci -v | grep AMD
    returns nothing
    Yoram David
    __________________________________________
    We must be the change we want for the world (Ghandi)

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