Bug 101872 - Black circles appear on slide preview (but not on actual slide). Affects Draw as well.
Summary: Black circles appear on slide preview (but not on actual slide). Affects Draw...
Status: RESOLVED WORKSFORME
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
Version:
(earliest affected)
5.1.4.2 release
Hardware: All Windows (All)
: medium normal
Assignee: Serge Krot (CIB)
URL:
Whiteboard:
Keywords:
: ropo1214 (view as bug list)
Depends on:
Blocks:
 
Reported: 2016-09-03 08:18 UTC by edward.guitaro
Modified: 2019-03-14 09:50 UTC (History)
5 users (show)

See Also:
Crash report or crash signature:


Attachments
A screenshot of the problem with added red annotation. (85.78 KB, image/png)
2016-09-03 08:25 UTC, edward.guitaro
Details
Screenshot image of bug preview slides on new presentation created today (2.46 KB, image/jpeg)
2016-10-17 20:29 UTC, edward.guitaro
Details
Screenshot of the problem (43.66 KB, image/jpeg)
2016-11-15 17:03 UTC, Hoang
Details

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Description edward.guitaro 2016-09-03 08:18:01 UTC
User-Agent:       Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36
Build Identifier: LibreOffice 5.1.4.2

At one point when using LibreOffice 5.1.4.2, 5 mysterious plain black circles appeared on the slide preview of the current slide in the "Slide pane" (of course they weren't on the slide itself). Closing then reopening this pane and changing slide didn't remove them.

Reproducible: Didn't try

Steps to Reproduce:
? I don't know.
Actual Results:  
?

Expected Results:  
?

[Information automatically included from LibreOffice]
Locale: en-GB
Module: PresentationDocument
[Information guessed from browser]
OS: Windows (All)
OS is 64bit: yes


Reset User Profile?No
Comment 1 edward.guitaro 2016-09-03 08:25:44 UTC
Created attachment 127132 [details]
A screenshot of the problem with added red annotation.

A screen capture of the problem (LibreOffice 5.1.4.2 Impress slide pane slide preview having mysterious black circles on it, not on the slide) when it happened, with added red annotation describing the problem with an arrow pointing to it.
Comment 2 edward.guitaro 2016-09-03 08:40:04 UTC
After trying the following things after the problem occurred, it did not resolve (the dots did not disappear): (1) Closing and reopening the slide preview pane. (2) Editing the slide. (3) reloading the file with "File>Reload" in the toolbar, which seems to refresh the slide previews. (4) Closing and reopening the file. (5) Adding a new slide. (6) Restarting LibreOffice (surprisingly).
Comment 3 edward.guitaro 2016-09-03 08:42:40 UTC
The slide sorter view mode is unaffected by the problem (the previews do not have the black circles). This proves that it is not caused by the slide content (along with the slide editor content itself).
Comment 4 Buovjaga 2016-09-24 17:57:53 UTC
Please try with 5.2.1.
If it still happens, tell us the setting of your
Tools - Options - LibreOffice - View - Use OpenGL for all rendering

I seem to remember a similar report, but I am unable to find it now.

Set to NEEDINFO.
Change back to UNCONFIRMED, if the problem persists with 5.2.1. Change to RESOLVED WORKSFORME, if the problem went away.
Comment 5 Buovjaga 2016-09-24 19:05:37 UTC
*** Bug 101926 has been marked as a duplicate of this bug. ***
Comment 6 Buovjaga 2016-09-24 19:10:44 UTC
Still didn't find the older report I remembered, but found a newer report against Draw. It showed OpenGL was not in use.

Setting to NEW.
Comment 7 edward.guitaro 2016-09-24 19:38:33 UTC
I have checked my LibreOffice version 5.2.1.2. I haven't managed to reproduce it with a new document (I haven't really tried) but the original document still has the same black circles on slides 7 and 8 out of 9 (which I think are the same slides as the original). Also my "Tools>Options>LibreOffice>View>Graphics Output>Use OpenGL for all rendering" option is unchecked (OpenGL is disabled) like "a newer report against Draw. It showed OpenGL was not in use" (Comment 6).
Comment 8 edward.guitaro 2016-10-17 20:29:04 UTC
Created attachment 128051 [details]
Screenshot image of bug preview slides on new presentation created today

More recently, I created a new LibreOffice Impress slide presentation and on two slides this bug appeared - two obvious black circles again on the slide 6 preview and part of one at the top of the slide 7 preview. This is a screenshot image of that.

I have noticed a similarity between the original bug slide previews and this document's bug slide previews - that both slides have content with bullet points. This may be unrelated but could help.
Comment 9 V Stuart Foote 2016-10-18 00:16:55 UTC
Errant font fallback or unexpected substitution from OpenSymbol to another font? Segoe UI perhaps?

What font is specified for the bullets?
Comment 10 edward.guitaro 2016-10-18 14:42:11 UTC
I don't really see how bullets could appear as large circles on a slide preview but that is a possibility or anything else related to the bullets.
I also don't see how the what font the bullets are affects this.
The font for the bullets on the original problematic slides (first document) is Segoe UI and character U+25CF is used. The font for the bullets on the problematic slides of the second document is Segoe UI and the characters are U+FB00 and U+25CF. I found this using the "Format>Bullets and Numbering>Customise>Numbering>Character>Select..." dialogue window.
Comment 11 Hoang 2016-11-15 17:03:47 UTC
Created attachment 128768 [details]
Screenshot of the problem
Comment 12 Hoang 2016-11-15 17:05:08 UTC
Comment on attachment 128768 [details]
Screenshot of the problem

I am using LibreOffice 5.2.2.2 on Windows 10.
Comment 13 QA Administrators 2017-11-16 09:22:49 UTC Comment hidden (obsolete)
Comment 14 Thorsten Behrens (allotropia) 2019-03-14 09:50:19 UTC
This appears implicitely fixed by the font subsystem rework that happened around 6.0 -> setting to fixed from LibreOffice 6.0 on.