https://bugs.kde.org/show_bug.cgi?id=459804

--- Comment #6 from Luiz Angelo De Luca <luizl...@gmail.com> ---
(In reply to Vlad Zahorodnii from comment #5)
> Hmm, I see nothing "weird" about your setup. A shot in the dark:
> 
> - can you run kwin with KWIN_DRM_SW_ROTATIONS_ONLY=1 environment variable
> set? e.g. you could put it in /etc/environment and reboot the computer
> 
> - if the issue is still reproducible, can you try setting
> KWIN_FORCE_SW_CURSOR=1 too?

With KWIN_DRM_SW_ROTATIONS_ONLY=1, the issue is still there
With KWIN_FORCE_SW_CURSOR=1, it worked as expected. 

I tested the KWIN_FORCE_SW_CURSOR keeping KWIN_DRM_SW_ROTATIONS_ONLY set. Is it
worth it to test it without KWIN_DRM_SW_ROTATIONS_ONLY?

The software cursor now draws a darker region over the konsole black (with a
little bit transparent) background for a second while moving when konsole when
the window under it is mostly white. I don't know how software cursors works
today but in the old times, we used to copy the region where the cursor would
appear, draw, before drawing the next cursor position, erase it pasting the
copied region. It looks like kwin copied konsole region (or asked konsole to do
it) without considering the transparency effect, just like the spectacle
ignores that same effect while taking a screen shot.

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