I have a feeling this is something to do with the Nvidia driver. I first noticed this on my desktop PC which was using Mint 20 (based on Ubuntu 20.04), and the "Fresh" PPA of Libreoffice 7.3. I recently moved to Mint 21, based on Ubuntu 22.04. Mindful of this lagging issue in the font selection box, I tested the Mint 21 live USB, which comes with Libreoffice 21. There was no lag when booting from the USB; the font selection box scrolled normally. However, once Mint 21 was installed, and the Nvidia driver was installed from Driver Manager and used instead of Nouveau, then sure enough the font selection box started lagging again.
I also experience no lagging on Mint 21 on my laptop, which is using the built-in Intel graphics chip. So I think this is some sort of rendering issue caused by Nvidia. Try it yourself; try booting into a Live USB of Ubuntu 22.04, make sure the graphics driver is still just Nouveau, and you should find the font selection box works normally. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice in Ubuntu. https://bugs.launchpad.net/bugs/1969709 Title: libreoffice font selection unusably slow Status in fontconfig package in Ubuntu: New Status in libreoffice package in Ubuntu: Confirmed Bug description: Trying to scroll through the font list in the menu bar, I experience an unacceptable degree of lagging. Just popping up the dropdown list takes 7-10 seconds and the system takes the same amount of time to respond to perform individidual scrolling gestures. The CPU jumps to 100% and the whole system becomes unresponsive. I have tried deb, snap and even the packages offered on the site of the LibreOffice project. They all manifest the same behaviour. The only thing that works is disabling font previews. I have downgraded to 7.2 for now, which appears to be unaffected. I have contacted the LibreOffice team and they tell me that this should be solved by fontconfig 2.14. Unfortunately, Ubuntu 22.04 is shipping 2.13... ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: libreoffice-core 1:7.3.2-0ubuntu2 ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30 Uname: Linux 5.15.0-25-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu82 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Apr 21 05:01:24 2022 ExecutablePath: /usr/lib/libreoffice/program/soffice.bin InstallationDate: Installed on 2022-03-27 (24 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20220326) SourcePackage: libreoffice UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1969709/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
