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I use Ubuntu 18.04 (recently installed) with 3 displays. One of them keeps turning off and on from time to time.

  • restarting the system sometimes fixes the issue
  • opening the system settings sometimes fixes the issue, some other time causes the issue

I'm 100% sure it's not a display issue because I tried to replace the display and the problem is still there, so I'm sure it's something about the software and not the hardware.

EDIT:

  • apparently also unplugging and plugging the display again sometimes solves the issue
  • typing xrandr also sometimes solves the issue
  • the combination of the last two usually solves the issue, but only if I keep the settings closed

1 Answer 1

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Apparently the cause was that I was always trying with different type of displays.

Since I replaced my displays in order to have 3 displays of the same brand and model, the problem disappeared.

So, to whoever is experiencing the same issue: check if one of your displays is way older/different compared to the other ones, in that case there is a good chance that replacing it with a newer one will solve the issue forever.

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