These lines suggest some graphics-related packages are missing:
(II) GLX: Initialized DRISWRAST GL provider for screen 0
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
Please run:
dpkg -l > allpackages.txt
and then attach the file 'allpackages.txt'.
** Package changed: xorg (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: New => Incomplete
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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/1839253
Title:
Excessive screen tearing and flickering
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