Bug 168287 - Impress: Fade-In duration setting is ignore - animation stuck
Summary: Impress: Fade-In duration setting is ignore - animation stuck
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
Version:
(earliest affected)
25.2.4.3 release
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: perf
Depends on:
Blocks: Object-Animations Performance
  Show dependency treegraph
 
Reported: 2025-09-05 16:04 UTC by Christian
Modified: 2025-09-06 12:45 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
Impress doc with animated slides (39.68 KB, application/vnd.oasis.opendocument.presentation)
2025-09-05 16:05 UTC, Christian
Details
video with cpu spikes (2.13 MB, video/mp4)
2025-09-06 12:35 UTC, Mateusz Wlazłowski
Details

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Description Christian 2025-09-05 16:04:59 UTC
Description:
In a Presentation a Fad-In effect is used. This appears very clumsy because the Duration setting does not seem to be taken into account properly. The fade-In appears to last randomly long and a sequence of multiple animations looks quite clumsy. 

Steps to Reproduce:
1. Open provided Testcase in LO
2. Change to presentation mode
3. Second slide is using "Appear" Effect instead of "Fade-In" with appears much smoother. 

Actual Results:
Animation is stuck and looks clumsy

Expected Results:
Should be closer to Slide 2 


Reproducible: Always


User Profile Reset: No

Additional Info:
The document was originally made in MS PowerPoint.
Comment 1 Christian 2025-09-05 16:05:25 UTC
Created attachment 202695 [details]
Impress doc with animated slides

Impress doc with animated slides
Comment 2 m_a_riosv 2025-09-05 21:10:30 UTC
At opening the sample, both have Smoothly with 0-05 seconds.

Version: 25.2.6.2 (X86_64) / LibreOffice Community
Build ID: 729c5bfe710f5eb71ed3bbde9e06a6065e9c6c5d
CPU threads: 16; OS: Windows 11 X86_64 (10.0 build 26100); UI render: Skia/Raster; VCL: win
Locale: es-ES (es_ES); UI: en-US
Calc: CL threaded
Comment 3 Mateusz Wlazłowski 2025-09-06 12:35:48 UTC
Created attachment 202706 [details]
video with cpu spikes

Confirm.

As per my attachment, we can see cpu spikes during the times when the presentation freezes. During these times, we can also see the timer to be stuck.

There are 2 freezes : one before showing the number 1 during 3 seconds, 
the second before showing the number 4 during 5 seconds. 



Version: 25.8.1.1 (X86_64) / LibreOffice Community
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Linux 6.14; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Flatpak
Calc: threaded

Version: 25.2.5.2 (X86_64) / LibreOffice Community
Build ID: 03d19516eb2e1dd5d4ccd751a0d6f35f35e08022
CPU threads: 2; OS: Windows 11 X86_64 (10.0 build 22621); UI render: Skia/Raster; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded