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Sometimes when I boot up, instead of my login screen, I get a screenful of vertical purple stripes. There is a simple workaround: I just switch to a Linux virtual ...
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  1. #1
    Linux Engineer hazel's Avatar
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    Why do I get purple stripes on my screen?


    Sometimes when I boot up, instead of my login screen, I get a screenful of vertical purple stripes. There is a simple workaround: I just switch to a Linux virtual console and then back again. Sometimes I have to do it more than once but eventually the normal login widget appears. It happens with both gdm and slim.

    I am curious to know what causes this behaviour. I have an Intel 82810 (CGC) Chipset Graphics Controller (rev 03).
    "I'm just a little old lady; don't try to dazzle me with jargon!"

  2. #2
    Linux Guru Rubberman's Avatar
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    Has it always done this, or is this a recent development? If recent, then I think your video controller is staring to fail. Your switching modes to fix it would indicate a correlation with the chip failure scenario.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

  3. #3
    Linux Engineer hazel's Avatar
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    It's happened on and off since I've had this machine, which is about two years now. I bought it second-hand. I haven't noticed the stripes getting any more frequent lately but your comment sounds ominous.
    "I'm just a little old lady; don't try to dazzle me with jargon!"

  4. #4
    Linux Guru Rubberman's Avatar
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    I could be a driver error also in that the possibility of a race condition in initializing the board is not being accounted for by the driver. Is the video built into the motherboard, or is it separate? If separate, what make+model is it? Since it has been more or less stable in behavior since you purchased the computer, then I think it is less likely that there is a hardware failure occuring.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

  5. #5
    Linux Engineer hazel's Avatar
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    Quote Originally Posted by Rubberman View Post
    It could be a driver error also in that the possibility of a race condition in initializing the board is not being accounted for by the driver. Is the video built into the motherboard, or is it separate?
    It's an on-board chip.
    Since it has been more or less stable in behaviour since you purchased the computer, then I think it is less likely that there is a hardware failure occuring.
    Well, that's a relief! Like I said, it doesn't happen all that often. But what do you mean by "initialising the board"? I thought all hardware was initialised by the kernel at boot.
    "I'm just a little old lady; don't try to dazzle me with jargon!"

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