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Bug 122650 - blurry fonts of text size and text style lists with a 200% scaling on 4k HiDPI display
Summary: blurry fonts of text size and text style lists with a 200% scaling on 4k HiDP...
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
(earliest affected) release
Hardware: All All
: medium normal
Assignee: Not Assigned
Depends on:
Blocks: HiDPI
  Show dependency treegraph
Reported: 2019-01-11 09:58 UTC by Frederic Parrenin
Modified: 2019-10-22 11:40 UTC (History)
6 users (show)

See Also:
Crash report or crash signature:

.png showing the blurry text styles list (653.87 KB, image/png)
2019-01-11 09:58 UTC, Frederic Parrenin
.png screenshot showing the blurry text sizes list (562.54 KB, image/png)
2019-01-11 09:59 UTC, Frederic Parrenin

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Description Frederic Parrenin 2019-01-11 09:58:23 UTC
Created attachment 148233 [details]
.png showing the blurry text styles list

The lists of text sizes and text styles in the toolbar look blurry with a scaling of 200% on a 4k HiDPI display.
I attach two screenshots to demonstrate the problem.
By comparison, the text fonts list looks crisp.
Comment 1 Frederic Parrenin 2019-01-11 09:59:04 UTC
Created attachment 148234 [details]
.png screenshot showing the blurry text sizes list
Comment 2 Mike Kaganski 2019-01-11 10:33:17 UTC
Please provide some details:

1. Which OS is used?
2. How did you set the said scaling (which tool was used and which settings there set to what)?
3. Full content of Help->About, including VCL plugin info

This could allow others to try to reproduce this problem, which could be OS/DM, or VCL-dependent.
Comment 3 Frederic Parrenin 2019-01-11 10:37:18 UTC
Yes, sorry, I forgot to specify that I am on debian 10 using wayland.
I set the scaling to 200% in the gnome control panel, display section.
Build ID: 1:6.1.4-3
Threads CPU : 8; OS : Linux 4.19; UI Render : par défaut; VCL: gtk3; 
Locale : fr-FR (fr_FR.UTF-8); Calc: group threaded
Comment 4 Timur 2019-01-11 12:01:31 UTC
Do you reproduce with daily master? Easiest is https://libreoffice.soluzioniopen.com/index.php/daily-version/.
Comment 5 Frederic Parrenin 2019-01-11 13:45:15 UTC
Yes, this also happens with master.
And to be more precise, this only happens when you change the scaling (from 100% to 200%) when LO is running.
If you restart LO, the problem is removed.
Comment 6 Frederic Parrenin 2019-01-11 13:45:42 UTC
And contrary to what I said, this also happen with the text font list.
Comment 7 Dieter Praas 2019-09-01 08:52:00 UTC
Frederic, it seems, that nobody could confirm the described bug.
A new major release of LibreOffice is available since this bug was reported. Could you please try to reproduce it with the latest version of LibreOffice from https://www.libreoffice.org/download/libreoffice-fresh/ ?I have set the bug's status to 'NEEDINFO'. Please change it back to 'UNCONFIRMED' if the bug is still present in the latest version.
Comment 8 Frederic Parrenin 2019-09-02 09:11:41 UTC
I can confirm this bug is still present with
Actually, this happens sometimes when I change the monitor, from the one integrated into my laptop, to my external monitor.
Note that I also have with problem with other gtk applications, like nautilus.
So this is probably a gtk issue.
Comment 9 Buovjaga 2019-10-22 11:40:54 UTC
What if you try 6.4 alpha1 http://libreoffice.soluzioniopen.com/
by launching with

SAL_USE_VCLPLUGIN=kf5 ./LibreOffice-

(after making the file executable)