Same issue for me using latest stable NVidia drivers on 20.04 with latest 7.2 Libre office snap.
I've noticed that only Calc is affected. Impress and Writer are not affected. So there must be some calc specific graphics acceleration method causing high CPU rendering load. Unlike the orig bug report, what worked for me was removing the snap and reverting to old deb `sudo apt install libreoffice` back to 6.4.7.2 non- snap version. No rendering performance issues with the older deb package. https://ask.libreoffice.org/t/calc-and-writer-ver-7-0-are-extremely- slow/58522/8 mentions trying this which I tried with the 7.2 snap version: SAL_USE_VCLPLUGIN=gen libreoffice It seemed to work better but still somewhat slow and not nearly as responsive as the 6.4 deb package. -- 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/1940836 Title: Libreoffice Calc rendering very slow on GTK3 Status in libreoffice package in Ubuntu: Confirmed Bug description: I'm on a MATE 20.04 machine, with Nvidia proprietary drivers (for reference, can't use Nouveau, since my machine doesn't boot with it). Libreoffice Calc renders slow. The delay is very noticeable, even when just typing characters. If I remove the GTK3 styling (`libreoffice-gtk3` package), then the rendering speed is fine (but of course, the program is unstyled, with some workflow consequences). I've tried to run on GTK2 (`libreoffice-gtk2` package installed), but I see Calc as unstyled, so it seems it's not actually running on GTK2. I've also tried to disable HW acceleration, but there is no improvement. I don't experience this slowness on any other program on my installation. I've noticed that when there's a delay, the Xorg process CPU occupation skyrockets (depending on how fast I type, it may go even to 100% (single thread)). I've reproduced the same problem on all the LO versions, from the default (6.4.7) to the latest (7.2). The kernel version doesn't affect the problem as well (experienced on different 5.x versions). I've tried a packaged LO (from https://libreoffice.soluzioniopen.com), and it has the same behavior. I'd be perfectly happy to run on GTK2 as workaround, if that allowed persistent copy/paste :) ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: libreoffice-calc 1:6.4.7-0ubuntu0.20.04.1 ApportVersion: 2.20.11-0ubuntu27.18 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: MATE Date: Mon Aug 23 15:21:08 2021 InstallationDate: Installed on 2020-07-01 (418 days ago) InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: libreoffice UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1940836/+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
