Thanks.

I wonder if this bug is directly related to "using Intel graphics on my
hybrid Nvidia laptop". Since regular Intel GPU users never seem to see
such problems. Although this is also one of the first bug reports about
a Coffee Lake GPU I have seen too, so it might be an Intel problem...

1. Can you please try disabling the Nvidia ("discrete") GPU in the
system BIOS and tell us if that fixes it?

2. Can you please also run 'dpkg -l > allpackages.txt' and send us the
resulting file 'allpackages.txt'?

3. If the problem persists (and only if) then please also attach copies
of your Xorg log files (/var/log/Xorg*log). Please also attach a copy of
your Xorg configuration file if you have one (find /etc -name
xorg.conf).

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https://bugs.launchpad.net/bugs/1811808

Title:
  Tearing and/or flickering when using Intel graphics

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