I work with master for my lecture notes and papers many hours every day,
and very occasionally (maybe once a month) I see what I think is
referred to as "screen tearing".
It usually happens when scrolling. After it occurs, I cannot take a
screenshot (that triggers a correction). All I could do was take a
picture with my phone.
Here is the "before" (i.e., it shows the issue):
https://www.dropbox.com/s/n9kmvey69hxt9gf/before-lq.png?dl=0
Here is the "after" (i.e., after a redraw):
https://www.dropbox.com/s/rtv49qxbyoa0sjh/after-lq.png?dl=0
I have never been able to reproduce it and don't expect that I'll ever
be able to put a jar over the bug.
Has anyone ever seen this? I would be surprised if anyone has seen this
that does not use master extensively every day since it is very rare.
Probably the best course of action is to do nothing until someone else
sees this issue, or until I can reproduce with a different version of
Qt. I will eventually upgrade to Ubuntu 22.04 so I can report back if I
ever reproduce after that fresh installation. Also, I am currently using
X. Perhaps on 22.04 I should switch to Wayland and see if I can
reproduce on that.
Nonetheless, I still wanted to check in case anyone else by chance has
seen this.
Scott
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