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Thread: Nvidia fix for Not optimum mode & error no video mode activated

  1. #1
    Join Date
    Aug 2012

    Nvidia fix for Not optimum mode & error no video mode activated

    Here's a list of what I tired so you know what I did:
    Installed the driver from the hardware additional drivers, update manager added another driver this hosed the video completely. I formated, re-installed and tried

    sudo sed -i -e 's/#GRUB_TERMINAL/GRUB_TERMINAL/g' /etc/default/grub
    for text mode which gave me a clue on what the problem was.
    Read and tried the fixes on
    Tried in grub NOMODESET. Lastly I tried Commented #Grub_Hidden_Timeout

    After all that, I finally got it! I've been beating this thing to death, with searching and experimenting. But here's the answer. If you have a Nvidia video card (mine is a Nvidia GeForce 7025 / nForce 630a).
    I kept getting Not optimum mode : Recommended mode 1280X1024 /60.
    When I commented out grub so I could see the boot sequence I founderror: no video mode activated.
    So when in grub I noticed GRUB_GFXMODE= commented out, so I uncommented it and added the correct video specs of 1280X1024 to it. Saved it and rebooted and low and behold it works.

    Here's the break down:
    Open the terminal and paste this in:
    gksudo gedit /etc/default/grub
    hit enter, enter your password, and about 10 lines up from the bottom you'll see
    # GRUB_GFXMODE=640X480.
    You need to edit two parts, first remove the # from the line, then change the 640X480 to the video card specs, example: mine is 1280X1024.
    Save the file and run
    sudo update-grub
    and reboot. Both errors went away after I did this. I hope it works for you as well.
    Last edited by dwb814; October 18th, 2012 at 06:25 PM. Reason: editing

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