Bug 141959 - LibreOffice Vanilla - Writer displays lines across page width where none should be present - screen redraw issues
Summary: LibreOffice Vanilla - Writer displays lines across page width where none shou...
Status: RESOLVED WORKSFORME
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
7.1.2.2 release
Hardware: ARM macOS (All)
: high major
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: regression
Depends on:
Blocks:
 
Reported: 2021-04-29 06:49 UTC by Alex Thurgood
Modified: 2021-12-07 11:44 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
Writer screen redraw issue (14.82 KB, image/png)
2021-04-29 06:50 UTC, Alex Thurgood
Details

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Description Alex Thurgood 2021-04-29 06:49:32 UTC
Description:
Several Writer documents that display without issue on other older versions of LibreOffice are now displaying black lines across the width of the page.

A screenshot is attached. The part of the document screenshotted should be blank (default Writer document background).

Scrolling down often makes the lines disappear, but an upwards scroll brings them back.

It seems, to all intents and purposes, that only the refreshed screen portion is redrawn in successive small steps, hence the appearance of the lines.  

Steps to Reproduce:
1. Load a multipage Writer document.
2. Scroll down.
3. Observe presence of lines drawn across width of page, which disappear / reappear as scrolling progresses downwards or upwards.

Actual Results:
Incorrect screen redrawing while scrolling

Expected Results:
No redraw issues, smooth display of document.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 7.1.2.3 / LibreOffice Community
Build ID: a393d9064b7eb849da7f488ab43f56a404be32ae
CPU threads: 8; OS: Mac OS X 11.3; UI render: default; VCL: osx
Locale: fr-FR (fr_FR.UTF-8); UI: fr-FR
Calc: threaded
Comment 1 Alex Thurgood 2021-04-29 06:50:44 UTC
Created attachment 171487 [details]
Writer screen redraw issue
Comment 2 Aron Budea 2021-05-05 13:40:26 UTC
Alex, have you had a chance to check this in the 7.1.2 TDF build as well?
What's the display setup and resolution/scaling used?

The bug reminds me of bug 141063, but that was reported for images, and is supposed to be fixed in 7.1.2.
Comment 3 Xisco Faulí 2021-05-06 14:05:05 UTC
(In reply to Aron Budea from comment #2)
> Alex, have you had a chance to check this in the 7.1.2 TDF build as well?
> What's the display setup and resolution/scaling used?
> 
> The bug reminds me of bug 141063, but that was reported for images, and is
> supposed to be fixed in 7.1.2.

Setting to NEEDINFO
Comment 4 Alex Thurgood 2021-05-06 18:31:13 UTC
I've not seen this particular manifestation on TDF LO, but there are other tearing / blanking / redraw effects on that, making it harder to determine whether they are all linked or different.
Comment 5 Aron Budea 2021-05-07 02:54:20 UTC
(In reply to Alex Thurgood from comment #4)
> I've not seen this particular manifestation on TDF LO, but there are other
> tearing / blanking / redraw effects on that, making it harder to determine
> whether they are all linked or different.
Would be good to track those somewhere as well, eg. there's bug 141729. There were also various duplicates of bug 138122 involving display issues, albeit those should be gone in 7.1.2.

This bug should probably be revisited once the various display issues affecting Macs in LO have been fixed.
Comment 6 rahul kumar 2021-05-20 00:59:58 UTC Comment hidden (spam)
Comment 7 Alex Thurgood 2021-09-24 14:37:44 UTC
Whilst I don't see exactly the same large number of lines in current production releases of LO, the problem still occurs, producing large black blocks that sometimes go away when scrolling back up to the beginning of the document, and sometimes do not.
Comment 8 leonid 2021-11-23 18:53:54 UTC
I don't see this problem on Version: 7.3.0.0.alpha1 / LibreOffice Community
Build ID: a3c29ae3d906f4692090bd4e5dab29623c66014a
CPU threads: 8; OS: Mac OS X 12.0.1; UI render: default; VCL: osx
Locale: ru-RU (ru.UTF-8); UI: ru-RU
Calc: threaded
Comment 9 Alex Thurgood 2021-12-07 11:44:14 UTC
Let's close this as WFM, I don't seem to be able to reproduce the behaviour any more in

Version: 7.2.1.2 / LibreOffice Community
Build ID: 87b77fad49947c1441b67c559c339af8f3517e22
CPU threads: 8; OS: Mac OS X 10.16; UI render: default; VCL: osx
Locale: fr-FR (fr_FR.UTF-8); UI: fr-FR
Calc: threaded