________________________________________
Fra: Jean-Marc Lasgouttes <[email protected]>
Sendt: 7. mai 2019 12:18
Til: [email protected]; Helge Hafting
Emne: Re: LyX 2.3.2 on wayland, rendering errors

Le 26/04/2019 à 12:04, Helge Hafting a écrit :
> LyX 2.3.2 in arch linux supports wayland rendering (not using X11) by
> setting QT_QPA_PLATFORM=wayland-egl
>
> This mostly works fine, with one exception: Now and then, large parts of
> the main window shows my background image instead of lines from the
> document.

Hi Helge,

Can you try to recompile with the attached patch applied?

JMarc



Your patch fixed the problem!  
Without the patch: 2.3.3dev runs on wayland, but often displays the background 
image instead of plain text.
With this patch: 2.3.3dev on wayland seems to work perfectly. I can scroll 
through the user guide at high speed. And I have not seen any glitches where 
the background shows instead of text.

To me, it does not look like "missing drawing", but "wrong drawing".  With 
"missing drawing", I'd expect old content to stay while only some lines get 
updated. Instead, lines that were fine is suddenly overpainted with my 
background image.  Or maybe qt5 explicitly paints the background on anything 
that isn't updated properly? 

Anyway, the patch solved the problem. Is a bug report still necessary?
Helge Hafting

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