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I had Ubuntu 16.04 on an old Compaq laptop and it worked seamlessly. Recently, it suggested I update to Ubuntu 18.04. Then the nightmare began. After installing, the laptop uncontrollably flickered, at times making it impossible to use. I went back to 16.04 and the flicker was there also, so I'm guessing 18.04 changed the video settings.

I tried dozens of sudo this and that, and finally got 18.04 to stop flickering, but honestly I cannot recall which sudo command worked. I do know that the Nvidia sudo command completely locked me out of Ubuntu. Once it was stable, I went to Netflix to watch a video, but it was no good. I got some error message/number and searched for a fix. I ran another sudo to fix it, and then the flickering screen came back.

I can't use Windows 10 on the old laptop (it runs as fast as a turtle sleeping), and I can't go back to Ubuntu 16.04 because the flickering screen is still there.

I'm in a nightmare. Any help?

karel
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Floyd Beck
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1 Answers1

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I feel like I was just in your same shoes, then I found this answer: Graphics problem on Ubuntu 18.04 - blurred text + screen flickering

Try that by removing the following from /etc/environment if it's there: 

CLUTTER_PAINT=disable-clipped-redraws:disable-culling
CLUTTER_VBLANK=True`

Yes, more sudo. Use your favorite editor, modify the file, then reboot. I would do it like this:

sudo nano /etc/environment

Delete the lines above, save with ctrl+x, y to accept, and reboot:

sudo reboot
Nick_4
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