Trying to plug my 8-inch extra monitor into my Linux laptop and it's just blinking on and off rapidly, sometimes showing what it should show, sometimes showing all blue. Can't tell if the problem is Linux, or if the cable is loose/dying, or if the laptop cannot supply adequate power for the screen (on my Windows desktop I use it with a powered usb hub).
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@mcc I've developed a paranoia about DisplayPort cables and the weird screen effects they can produce. I have one that gives me snow on the screen if I wiggle it wrong.