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Thread: Upgade 12.04 to 12.1 Monitor Loses Sync

  1. #1
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    Upgade 12.04 to 12.1 Monitor Loses Sync

    I recently upgraded my Ubuntu 12.04 to 12.1. When I rebooted into Ubuntu the monitor completely lost sync, so I had to shut the pc down. I made an installation DVD and tried to boot from it and possibly reinstall, but the same thing happened with the monitor. I had no problem with 12.04 and previous Ubuntu versions. My monitor is an older Viewsonic VPA150. In Windows 7 my monitor driver is "generic non-pnp". Any ideas how I can change the driver and be able to see what is going on??
    Regards
    J.Clark

  2. #2
    dino99's Avatar
    dino99 is offline Ubuntu addict and loving it
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    Re: Upgade 12.04 to 12.1 Monitor Loses Sync

    with recent kernels, X is directly drived without needing xorg.conf
    then all depend on the graphic driver used.

  3. #3
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    Re: Upgade 12.04 to 12.1 Monitor Loses Sync

    Thanks d99. I was able to use Grub2, advanced ubuntu features, 3.2.0-35-generic-pae to boot up vs the 3.5.0-21-generic. The system features show for graphics "unknown". My computer is an hp p6102f using nVidiaGeForce9100 video. How do I install the correct driver for this. There was a post for using Jockey...is this the way to go?
    Regards

  4. #4
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    Re: Upgade 12.04 to 12.1 Monitor Loses Sync

    Quote Originally Posted by ve3pkc View Post
    Thanks d99. I was able to use Grub2, advanced ubuntu features, 3.2.0-35-generic-pae to boot up vs the 3.5.0-21-generic. The system features show for graphics "unknown". My computer is an hp p6102f using nVidiaGeForce9100 video. How do I install the correct driver for this. There was a post for using Jockey...is this the way to go?
    Regards
    if everything is working correctly, then don't worry too much about
    the "unknown" graphics message...I have the same message about my Nvidia
    card but it works perfectly...

    in the hardware field we have an old saying "if it ain't broke, then
    don't "fix" it..." this applies to software as well....

    Tommy
    Registered Linux User # 529389
    Arch Linux, Linux Mint 17.3 Rosa, Fedora 22 Linux
    my improved web page http://users.gilanet.com/~tfrost

  5. #5
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    Sep 2009
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    Re: Upgade 12.04 to 12.1 Monitor Loses Sync

    Thanks Tommy:
    I just removed the 3.5.0-21 kernel and headers, then updated the Grub loader and everything is working well. I think next time I will test using a USB stick to make sure everything works before I upgrade. I tested both my hp p6102f pavilion desktop and hp envy 4 laptop with both 12.04 and 12.1 on usb stick. Both had almost black screens out of sync. The hp envy has a complicated partitioning scheme, so I am going to try Ubuntu in a virtual machine either VirtualBox or VmWare.
    Regards
    J.Clark

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