Created attachment 1222159 [details]
A Screencast of Embedded PNGs slowing the scroll
Description of problem:
My laptop has quite good specs (core i7 haswell [quad-core], 16 GBs of RAM, Intel Iris Pro 5200 with 128 MB DRAM, and 250 GBs SSD). I use 2-finger touchpad scrolling all the time. When there's an embedded image in LibreOffice Writer, it slows down the scrolling especially with toucpad. Using the scrollbar mitigate the issue a little, but not a practical solution.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create a new document.
2. Insert or Paste some PNG Images.
3. Try to scroll through the pages, and compare pages with Text only and pages with Images.
Images slows down the scrolling.
Images doesn't slow down the scrolling.
In the attached video, I used 3 ways of scrolling:
1. First by dragging the scrolling bar,
2. Then scrolling using the mouse wheel,
3. Finally, using 2-finger touchpad gesture.
The difference is noticeable.
attach your sample document
Created attachment 1222377 [details]
Sample document with embedded PNGs
This is the sample document I was using when I noticed the lag.
It's in Arabic, I don't know if this will affect anything.
Worth noting that this issue doesn't occur with SAL_USE_VCLPLUGIN=kde4 or gen, but with KDE4, there's a lot of tearing when scrolling (I'm using Wayland).
I couldn't test 5.2.3 GTK2 (Every time I use SAL_USE_VCLPLUGIN=gtk2, it gives me the default GTK3).
It doesn't occur with LibreOfficeDev 5.3 GTK2, KDE4, or Gen. (I couldn't test GTK3 because it's disabled in the compiled builds, and I didn't have time to compile the source myself).
SAL_USE_VCLPLUGIN=gtk2 doesn't exist, for historic reasons it is spelled SAL_USE_VCLPLUGIN=gtk
Created attachment 1222383 [details]
GTK2 LibreOffice scrolling with tearing
(In reply to Michael Stahl from comment #4)
> SAL_USE_VCLPLUGIN=gtk2 doesn't exist, for historic reasons it is spelled
Oh, my bad. Now, I can try GTK2 with 5.2.3. It's scrolling without lags but with the same tearing issue that I've found in KDE4, but the tearing is another issue.
Recording with GNOME Shell under Wayland is broken, because the jittery effect isn't happening as shown in the video, it's just tearing that I can notice.
I've finally found the time (and disk space) to compile LibreOfficeDev 5.3 from source code. the same issue exists there too for GTK3 backend, no issues with GTK2, KDE4 or Gen.
I have the same issue here : images make Libreoffice's scrolling very slow. I use KDE as a desktop environment.
Build ID: 18.104.22.168-6.fc25
I'll be happy to provide further information as I'm writing my Phd with Libreoffice and solving this issue would help me a lot not getting mad :)
I wonder if this is solved with the fix for bug 1367846 in testing update 22.214.171.124-3.fc25 ?
I've got the same bug on LibreOffice Writer version 126.96.36.199-1.fc26.
It's damn too slow with GTK3 backend, switching to KDE4 backend helps.
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This bug persists in Fedora 26. Please reopen the bug.
Also, if you try to type new text in areas above the pictures, the text only shows up after a multi-second delay. Entering text below the pictures occurs with no delay.
Re-opening the bug as it's still persisting in the current version of Fedora (27).
Though, I followed the upstream bug closely and looks like the issue has been fixed in 6.0.0 so I'm waiting for this version to arrive in Fedora 27 (maybe 28) to test and make sure it's working.
If the solution has been backported to the affected versions above (as mentioned in the upstream bug), I assure you that it's not working right now, but I need confirmation from the maintainer.
"slowness" bugs tend to linger for ages given the subjectivity around what is slow and the difficultly to reproduce on different hardware setups
libreoffice-188.8.131.52-4.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-51fd280bb4
libreoffice-184.108.40.206-4.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-51fd280bb4
libreoffice-220.127.116.11-4.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.
The speed of libre -office is somewhat improved, especially the graphics. But libre-office in combination with gtk3 is stil unusable for large presentations.
With libreoffice-gtk3-18.104.22.168-10.fc28.x86_64 installed and enabled.
- My CPU Core stay at 99% busy for the soffice.bin process
- I can't use the user interface, it continues blokes
Without any gtk library installed
- The CPU sticks at 12% and the Xwayland process between 35% till 69%. I
- I can stil use the interface.
Sorry for this comment, this was an update to an Fedora related bug: https://bugzilla.redhat.com/show_bug.cgi?id=1509059
(In reply to Bart Ratgers from comment #18)
> The speed of libre -office is somewhat improved, especially the graphics.
> But libre-office in combination with gtk3 is stil unusable for large
> With libreoffice-gtk3-22.214.171.124-10.fc28.x86_64 installed and enabled.
> - My CPU Core stay at 99% busy for the soffice.bin process
> - I can't use the user interface, it continues blokes
> Without any gtk library installed
> - The CPU sticks at 12% and the Xwayland process between 35% till 69%. I
> - I can stil use the interface.