Bug 160235 - Scroll lag with kf5 (cairo+wayland) VCL plugin, no lag with gtk3 (libreoffice-qt5 uninstalled)
Summary: Scroll lag with kf5 (cairo+wayland) VCL plugin, no lag with gtk3 (libreoffice...
Status: RESOLVED DUPLICATE of bug 152911
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: LibreOffice (show other bugs)
Version:
(earliest affected)
24.2.1.2 release
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-03-16 23:53 UTC by Matej Starc
Modified: 2024-04-04 02:31 UTC (History)
1 user (show)

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Description Matej Starc 2024-03-16 23:53:12 UTC
Description:
For some time already, all libreoffice programs started to run really bad (not responisve, etc.). Some time ago, I've heard about the skia reneder and though if I could test it. It looks all I had to do was remove the libreoffice-qt5 or libreoffice-gtk package which my problems by providing another renderers. 

PS: It is interesting because it runs smoothly on my PC. Might be because I have a dedicated gpu.

Steps to Reproduce:
I haven't been able to find another person with the same problem.
1. Install libreoffice-qt5 (name of the package on opensuse tumbleweed)
2. Start any libreoffice program (writer, draw) and open a simple file (or create a couple empty pages)
3. Try to scroll or just the program at all

Actual Results:
Everything lags. Scrolling is absolutely not smooth. It scrolls like I am on a computer from 1990.
Showcase: https://cloud.aljaxus.eu/index.php/s/QM3nzbtd2DMriBp

Expected Results:
A smooth experience: https://cloud.aljaxus.eu/index.php/s/fXSEWbW8WoC378z


Reproducible: Always


User Profile Reset: Yes

Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: Every
[Information guessed from browser]
OS: Linux (All)
OS is 64bit: yes
[Libreoffice copy-paste info]
Version: 24.2.1.2 (X86_64) / LibreOffice Community
Build ID: 420(Build:2)
CPU threads: 16; OS: Linux 6.7; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded


[KDE plasma]
Operating System: openSUSE Tumbleweed 20240314
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.7.9-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Comment 1 Stéphane Guillou (stragu) 2024-04-03 07:32:52 UTC
Thanks for the report. A couple of questions:

- What kind of display do you use? High DPI / large resolution?
- Please paste here the version information from the Help > About LibreOffice dialog _for when it lags_ (I assume you pasted the info for when it does not lag in comment 0).

I see you use Wayland, so potentially related reports are bug 160140, bug 153111 and bug 141578.
Comment 2 Matej Starc 2024-04-03 22:11:13 UTC
I'd like to correct myself as well. I does not run smoothly on my pc. Not at all actually. It runs worse than on my laptop (sadly i cannot get you logs from my pc right now because I nowhere near it).

Here is the information. I have a 90hz 2880x1800 screen on my laptop and I use 135% scaling in plasma settings (but this does not affect the programs performance).

Libreoffice
Version: 24.2.2.2 (X86_64) / LibreOffice Community
Build ID: 420(Build:2)
CPU threads: 16; OS: Linux 6.8; UI render: default; VCL: kf5 (cairo+wayland)
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded
Comment 3 Matej Starc 2024-04-03 22:16:34 UTC
It seems it runs smoothly when using x11. If you need someone to test or to provide certain logs, I can do that.

This can now be flagged as a duplicate, I think.
Comment 4 Stéphane Guillou (stragu) 2024-04-04 02:31:53 UTC
I think the best match is bug 152911 (kf5 cairo+wayland, scaling on, large display).
Thank you!

*** This bug has been marked as a duplicate of bug 152911 ***