Not certain. I expect it's an i915 driver issue as the old driver used in mint 18 seems fine.
Perhaps I've submitted the bug to the wrong group?
If so, apologies.
Best
G.

On Wed, 20 Nov 2019, 08:24 , <bugzilla-daemon@freedesktop.org> wrote:

Comment # 3 on bug 112328 from Lakshmi 
Is this an xorg bug?

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