*** This bug is a duplicate of bug 1826125 ***
https://bugs.launchpad.net/bugs/1826125
I should probably note that I am also using the non-touch non-4K version
(13-inch 1080p) screen with a clean install of 19.04. The "flash" does
not appear if the Ubuntu image provided by Dell (18.04) is installed and
then upgraded to 19.04. However it does occurs when 19.04 is clean
installed via the Ubuntu ISO downloaded from canonical. The flash is
much more obvious/annoying when the display is in "Night Light" mode.
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https://bugs.launchpad.net/bugs/1827790
Title:
Dell XPS 13 9380 - Screen flashes
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