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I have laptop with 18.04 installed, this problem also occurred when I used 16.04 before.

My screen seems to blink when I start typing, it blinked instantly that I could not capture the moment of it, anyhow the blinking also happens randomly, there is no pattern at all.

I have tried the suggestion from various source, this includes:

  1. Updating the kernel, I am using kernel 4.19 now, before this I was using kernel 4.5 or 4.6 but does not work also.
  2. Updating graphics driver, running command from https://askubuntu.com/a/215967. Doesn't seem to work, the flickering still happens.

How do I stop this from happening, it is not really distracting because it's only fraction of second, but if I can stop it I rather do so.

I don't have dedicated video graphics card, using Intel graphics at the moment. I think it's Intel HD 3000.

sudo lshw -C video | grep product result.

sudo lshw -C video | grep product
product: 3rd Gen Core processor Graphics Controller

uname -r result.

$ uname -r
4.19.20-041920-generic

If you want further command, I'd love to include them.

Ridgwell

Philippe Delteil
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    It seems it's a hardware problem. That's what I could infer from your description. – Tintin Apr 18 '19 at 14:48
  • Seconded. Looks like a hardware problem. Might be a loose connector or your screen might be about to go. Or worst case, its the inbuilt gpu, in which case toss the motherboard. – Domo N Car Apr 23 '19 at 14:26
  • Do you have an ambient light sensor on your laptop ? Maybe the driver isn't responding correctly to light changes due to your hands... – Robert Riedl Apr 25 '19 at 06:59
  • Are you certain that this isn't a hardware related problem? There are a lot of modern laptops out there that suffer this exact problem. Commonly it's associated with PWM for the screen below a certain brightness threshold. Please describe what it looks like. Is it a sort of immediate on/off-like thing or does it look like the cable to the screen is coming loose? – DannyBoy Apr 26 '19 at 12:09
  • any update on your issue, OP? – Robert Riedl May 06 '19 at 08:19
  • Probably hardware problem, I took it to computer repair service and it seems I don't have this problem anymore. –  May 06 '19 at 09:25

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