This video shows litter at the cursor when using Swiper for Emacs
search. Note near the top left of the screen, while the search string
"bitwise" is being typed in at the bottom, that the first match (the
word Bitwise in \subtitle{Bitwise Operations}) does not correctly
repaint, with echoes of the cursor being left behind as it moves across
the word.
This is the Ubuntu-installed Emacs 1:26.3+1-1ubuntu2, using Swiper
installed from ELPA; however, this sort of corruption shows up in a
variety of cases in Emacs (this is just the most reliable method I know
to trigger it).
Compton is NOT running in this test. Xorg is modesetting. Kernel is
5.4.0-42-generic.
Firefox just glitched significantly while looking up how to reliably
determine my Xorg server module, I will upload a video of that, as well.
** Attachment added: "emacs-search.mp4"
https://bugs.launchpad.net/ubuntu/+source/compton/+bug/1893969/+attachment/5416131/+files/emacs-search.mp4
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https://bugs.launchpad.net/bugs/1893969
Title:
Characters are rendered with a slight border when using custom xrandr
scaling
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