https://bugs.documentfoundation.org/show_bug.cgi?id=115380
Bug ID: 115380
Summary: Some slides and slide thumbnails are covered with
colored speckles
Product: LibreOffice
Version: 5.3.7.2 release
Hardware: x86 (IA32)
OS: Windows (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Impress
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: davidjudysm...@gmail.com
Created attachment 139502
--> https://bugs.documentfoundation.org/attachment.cgi?id=139502&action=edit
Normal slide view covered with colored speckles
I recently installed LibreOffice 5.3.7.2 (x64) on a new desktop (Dell Inspiron
3668, Windows 10 Pro, Intel Core i5-7400 CPU, integrated Intel graphics 630).
Now all of my old presentations show a few instances (maybe 1-3 per long
presentation) of slides that are covered with colored multi-pixel rectangular
speckles. Sometimes I see this on a normal slide view (see attachment);
sometimes it's a thumbnail in the slide pane; and sometimes it's a presentation
thumbnail in the Recent Files box. In every case, there's nothing actually
wrong with the slide itself: if I open the thumbnail or start a slideshow or
sometimes even just change the window size, the speckles disappear. And these
aren't flickers: the pattern of colored spots is stable when it appears.
The speckles seem to appear more often on thumbnails than on normal slides, and
more often on thumbnails of graphics (maps, lines, text boxes) and videos than
on those of photos.
I tried disabling OpenGL rendering, and since then I have not seen any
speckles. Could that be the cause? What are the implications of disabling it?
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