[Libreoffice-bugs] [Bug 141729] document content not displayed / instead showing grey overlay / blank region in writer and calc (macOS 11 aka 10.16 using 2.9 GHz Quad-Core Intel Core i7)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=141729

--- Comment #27 from John Gerrish <jdgerrish at alaska.net> ---
Yes,  I started a new document, and it came up paper-white in "normal" view.  I
moved the mouse onto the document, and everything below and right of the mouse
turns to background-grey.  Mouse to the top and the top margin stays white, but
everything below top margin is grey.  I started to type, and the rectangle of
the line to the right of what I was typing, became paper-white.  hit return and
cursor moved to next line and refreshes the document below to paper-white. 
move the mouse in the document and everything inside the margins below the
mouse goes background-grey.
If you click a different window (like to type this comment) that doesn't
completely cover the writer document, you can see the writer document refresh
to paper-white in the behind the front window.
It is kind of like someone was trying to speed up the display by cutting out
some of the repeated refreshing of the window as the mouse cursor occludes the
window content.  Other actions put the display back to rights.
In writer, this makes it nearly unusable.  The problem in calc (my last
comment) does not impact usability (much) but doesn't look right.
Both calc and writer seem to display un-initialized video memory with oversized
graphic artifacts, but this tends to subside after repeatedly testing
eventually overwrites (so it seems).  The most common one is a vertical line
with a right pointing triangular point.  It tracks the mouse movement but with
some inverse to the vertical movement and generally about half the window width
to the right but will blink out at anytime.  Really weird.
Would you like to do a zoom meeting with me and I could share my screen?  I
don't quite know how the video weirdness would show.

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