Sorry, but this looks to me like a broken (or just poorly connected) LCD panel in the laptop. Not a software problem.
I've had similar problems myself before, and the fix each time was to either replace the LCD panel, or to just reconnect its wires (sometimes the problem is just a bad connection). As a first point of call you should return the laptop to where you bought it, or contact HP Support about a warranty claim. ** Summary changed: - Screen flickers randomly appears on built-in laptop display only + Vertical line screen flickers randomly appears on built-in laptop display only ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1824415 Title: Vertical line screen flickers randomly appears on built-in laptop display only To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1824415/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp