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I've just recieved an old laptop that I have fixed and installed Kubuntu 8.04 on. Just about everything is working as it should but some colours sparkle. The graphic card ...
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  1. #1
    Linux Engineer Kieren's Avatar
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    [SOLVED] Sparkling colours in (K)Ubuntu


    I've just recieved an old laptop that I have fixed and installed Kubuntu 8.04 on. Just about everything is working as it should but some colours sparkle.

    The graphic card is an ATI Mobility Radeon 7000 and I'm using the default ATI driver that comes with Ubuntu as there doesn't seem to be any other available, from ATI or otherwise, that I could find.

    The colours that tend to sparkle the most are the blue on the default Kubuntu desktop back ground, a horizontal strip along the brown background of the Ubuntu forums and skin (people faces, arms, etc on photos)

    The sparkling looks like the colour of a pixle can't be displayed so it's flashing between to random colours. It's not every pixle on a picture, but the effected ones tend to group together.

    Anyone got any idea on what is causing this? Is it just the graphics card is too old and doesn't support enough colours?
    Linux User #453176

  2. #2
    Super Moderator devils casper's Avatar
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    Hi Kieren !

    Have you tried vesa driver instead of ati in /etc/X11/xorg.conf file?
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  3. #3
    Linux Engineer Kieren's Avatar
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    I haven't. I'll try that later and let you know how I get on.

    Thanks
    Linux User #453176

  4. #4
    Linux Engineer Kieren's Avatar
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    Not having any luck with vesa drivers. I just get a black screen until I reset back to the default ATI one. Any more ideas?
    Linux User #453176

  5. #5
    Super Moderator devils casper's Avatar
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    Could you post contents of /etc/X11/xorg.conf file here?
    Have configured your Monitor correctly. Are HorizSync and VertRefresh rates supported by your Monitor?
    It is amazing what you can accomplish if you do not care who gets the credit.
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  6. #6
    Linux Engineer Kieren's Avatar
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    I will post it when I get home from work. I used the "System Settings" from the Kmenu to change the driver over to vesa. I'm not sure what the HorizSync and VertRefresh rates were though. I did take a look at xorg.conf but it was very minimal.

    Anyway, I will post the file and check the rates tonight and let you know...
    Linux User #453176

  7. #7
    Linux Engineer Kieren's Avatar
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    # xorg.conf (X.Org X Window System server configuration file)
    #
    # This file was generated by dexconf, the Debian X Configuration tool, using
    # values from the debconf database.
    #
    # Edit this file with caution, and see the xorg.conf manual page.
    # (Type "man xorg.conf" at the shell prompt.)
    #
    # This file is automatically updated on xserver-xorg package upgrades *only*
    # if it has not been modified since the last upgrade of the xserver-xorg
    # package.
    #
    # If you have edited this file but would like it to be automatically updated
    # again, run the following command:
    # sudo dpkg-reconfigure -phigh xserver-xorg

    Section "InputDevice"
    Identifier "Generic Keyboard"
    Driver "kbd"
    Option "XkbRules" "xorg"
    Option "XkbModel" "pc102"
    Option "XkbLayout" "en"
    EndSection

    Section "InputDevice"
    Identifier "Configured Mouse"
    Driver "mouse"
    Option "CorePointer"
    EndSection

    Section "InputDevice"
    Identifier "Synaptics Touchpad"
    Driver "synaptics"
    Option "SendCoreEvents" "true"
    Option "Device" "/dev/psaux"
    Option "Protocol" "auto-dev"
    Option "HorizEdgeScroll" "0"
    EndSection

    Section "Device"
    Identifier "Configured Video Device"
    EndSection

    Section "Monitor"
    Identifier "Configured Monitor"
    EndSection

    Section "Screen"
    Identifier "Default Screen"
    Monitor "Configured Monitor"
    Device "Configured Video Device"
    EndSection

    Section "ServerLayout"
    Identifier "Default Layout"
    Screen "Default Screen"
    InputDevice "Synaptics Touchpad"
    EndSection
    Linux User #453176

  8. #8
    Super Moderator devils casper's Avatar
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    sorry for a long delay !

    Try these generic Refresh rates :

    Code:
    Section "Monitor"
    Identifier "Configured Monitor"
    HorizSync	        30-71
    VertRefresh	50-120
    EndSection
    It is amazing what you can accomplish if you do not care who gets the credit.
    New Users: Read This First

  9. #9
    Linux Engineer Kieren's Avatar
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    Thanks for the reply but this is no longer a problem. There is nothing I did directly to fix this but I think it may have been caused by the screen not being fitted to the mother-board properly.
    Linux User #453176

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