Bug 122161 - UI: Bright screen flashing when starting Impress presentation
Summary: UI: Bright screen flashing when starting Impress presentation
Status: RESOLVED INSUFFICIENTDATA
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
Version:
(earliest affected)
6.1.3.2 release
Hardware: All Linux (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: GTK3
  Show dependency treegraph
 
Reported: 2018-12-17 18:20 UTC by gtxe
Modified: 2021-09-09 03:41 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
workaround. save here: ~/.config/gtk-3.0/ (143 bytes, text/css)
2018-12-17 18:24 UTC, gtxe
Details

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Description gtxe 2018-12-17 18:20:36 UTC
Description:
When starting prestentation, the Presentation display flashes with a bright color  (it is the window background color defined in the gtk theme).
Using a dark gtk theme, it flashes with a dark color.
The duration is longer, if the first slide is more complex (big picture for example).
It looks little nonprofessional.
Tested with Manjaro (Xfce), openSUSE Leap (KDE), Fedora (Gnome): always the same.

I've made a workaround for this. It works good with disabled Presenter Console (there is another Bug). May be there are side effects for other gtk applications.

create a new file: ~/.config/gtk-3.0/gtk.css

/* avoid bright flickering when starting presentation with LibreOffice Impress */
window.background.fullscreen {
	background-color: #000000;
}


Steps to Reproduce:
1. Use bright desktop theme (specialy for gtk)
2. Create new Impress presentation with a big picture on the first slide (>4MP)
3. start presentation (F5)

Actual Results:
Screen flashes white, then black and then it shows the slide.

Expected Results:
Screen shows the slide (without flickering / flashing) when start presentation.
Custom color (Options -> Application Colors) would be great.


Reproducible: Always


User Profile Reset: No


OpenGL enabled: Yes

Additional Info:
Version: 6.1.3.2
Build ID: 6.1.3-2
CPU threads: 4; OS: Linux 4.19; UI render: default; VCL: gtk3; 
Locale: de-DE (de_DE.utf8); Calc: group threaded
Comment 1 gtxe 2018-12-17 18:24:21 UTC
Created attachment 147627 [details]
workaround. save here: ~/.config/gtk-3.0/
Comment 2 gtxe 2018-12-18 15:18:04 UTC
Side effect of the workaround, if presenter console enabled:
https://bugs.documentfoundation.org/show_bug.cgi?id=122176
Comment 3 Xisco Faulí 2019-01-21 18:42:18 UTC
Hello gtxe,
Could you please the current theme you're using?
I have set the bug's status to 'NEEDINFO'. Please change it back to
'UNCONFIRMED' once the information has been provided
Comment 4 gtxe 2019-01-22 15:40:40 UTC
Used Themes:
Manjaro Xfce: Vertex-Maia-Light (default)
Manjaro KDE: KDE-/GTK2-/GTK3-Theme: Breath (default)
openSUSE: I don't remember (I installed it just for testing). But it was the default theme.

The second screen is a projector and I changed the wallpaper to solid black color,
because I want that nothing should be visible, when no presentation active.
Comment 5 gtxe 2019-05-07 19:51:10 UTC
By the way, I noticed it is possible to change the VCL (Visual Class Library).
https://ask.libreoffice.org/en/question/78965/menu-appearance-is-hard-on-the-eyes/

kde5 VCL crashes with Kubuntu, when starting the presentation.

When kde4 VCL used, there is no flickering at presentation start!
Additionally I had to disable presenter console for smooth slide transitions (doesn't matter which VCL).
Comment 6 Xisco Faulí 2019-05-09 09:05:01 UTC
KDE5 is under ongoing development.
Could you please try to reproduce it with a master build from http://dev-builds.libreoffice.org/daily/master/ ?
You can install it alongside the standard version.
I have set the bug's status to 'NEEDINFO'. Please change it back to 'UNCONFIRMED' if the bug is still present in the master build
Comment 7 gtxe 2019-05-09 16:46:18 UTC
Tried three different versions, from PPA, "fresh" build, and master build (see below).

All are crashing.
Steps to reproduce:
- force kde5 VCL if not automatically used:
  SAL_USE_VCLPLUGIN=kde5 libreoffice(6.2/dev6.3) --impress
- start with any or empty presentation
- Disable presenter console
- Menu "Slide Show" -> "Presentation display" select "All displays"
- start presentation

Why did I try:
Presentation did not start at second screen, independent from preset.
But presentation over all displays is not realy what I want/need.


more problems:

ppa-version:
- some slide-effect don't work (fading)
- no kde4 VCL

master-build:
- no kde4 VCL

the main bug with gtk3 VCL (see start topic) is still there, in all versions.


At the moment the fresh-build with kde4 VCL works the best for me:
no crashing, slide effect are all working, no flickering.


https://launchpad.net/~libreoffice/+archive/ubuntu/ppa

Version: 6.2.3.2
Build ID: 1:6.2.3-0ubuntu0.18.04.1~lo1
CPU threads: 8; OS: Linux 4.18; UI render: default; VCL: kde5; 
Locale: de-DE (de_DE.UTF-8); UI-Language: en-US
Calc: threaded


https://www.libreoffice.org/download/libreoffice-fresh/

Version: 6.2.3.2
Build ID: aecc05fe267cc68dde00352a451aa867b3b546ac
CPU threads: 8; OS: Linux 4.18; UI render: default; VCL: kde5; 
Locale: de-DE (de_DE.UTF-8); UI-Language: en-US
Calc: threaded


http://dev-builds.libreoffice.org/daily/master/

Version: 6.3.0.0.alpha0+
Build ID: 98630a0bd49bd80652145a21e4e0d0ded792b36b
CPU threads: 8; OS: Linux 4.18; UI render: default; VCL: kde5; 
TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time: 2019-05-04_04:44:35
Locale: de-DE (de_DE.UTF-8); UI-Language: en-US
Calc: threaded
Comment 8 Xisco Faulí 2019-11-08 12:43:41 UTC
Hello gtxe,
at the point, KDE5 has reached a stable status.
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 9 QA Administrators 2020-06-27 03:49:47 UTC Comment hidden (obsolete)
Comment 10 gtxe 2020-06-28 16:02:19 UTC
Testet with Debian-Based KDE Distro and with fresh LibreOffice 6.4.4.2:
still flashes white when presentation started.

If you have a fast computer and composing effects enabled in KDE, perhaps you will not notice it. Insert hires photo in first slide, then you will.

Additional Info:
Version: 6.4.4.2
Build ID: 3d775be2011f3886db32dfd395a6a6d1ca2630ff
CPU threads: 6; OS: Linux 4.19; UI render: default; VCL: kf5; 
Locale: de-DE (de_DE.UTF-8); UI-Language: en-US
Calc: threaded
Comment 11 Xisco Faulí 2021-02-09 15:17:45 UTC
Dear gtxe,
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 12 QA Administrators 2021-08-09 03:41:49 UTC Comment hidden (obsolete)
Comment 13 QA Administrators 2021-09-09 03:41:51 UTC
Dear gtxe,

Please read this message in its entirety before proceeding.

Your bug report is being closed as INSUFFICIENTDATA due to inactivity and
a lack of information which is needed in order to accurately
reproduce and confirm the problem. We encourage you to retest
your bug against the latest release. If the issue is still
present in the latest stable release, we need the following
information (please ignore any that you've already provided):

a) Provide details of your system including your operating
   system and the latest version of LibreOffice that you have
   confirmed the bug to be present

b) Provide easy to reproduce steps – the simpler the better

c) Provide any test case(s) which will help us confirm the problem

d) Provide screenshots of the problem if you think it might help

e) Read all comments and provide any requested information

Once all of this is done, please set the bug back to UNCONFIRMED
and we will attempt to reproduce the issue. Please do not:

a) respond via email 

b) update the version field in the bug or any of the other details
   on the top section of our bug tracker

Warm Regards,
QA Team

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