Description: When I run Libreoffice on, and scroll rapidly back and forth, the performance rapidly drop. Basically, I use two-finger scroll on the touchpad, and rapidly move the fingers back and forth between the bottom and top of the touchpad. The longer I keep doing it, the lower the framerate gets, and if I keep doing it for a while the framerate drops so low that the window is marked as unresponsive. The performance then returns to normal if I stop scrolling for a few seconds. It's easiest to reproduce in Calc, but it happens in other components as well, such as long Writer documents. Steps to Reproduce: 1. Open Calc on Plasma Wayland 2. Start scrolling rapidly back and forth Actual Results: Performance drops severely Expected Results: Performance stays as normal Reproducible: Always User Profile Reset: Yes Additional Info: Operating System: openSUSE Tumbleweed 20230113 KDE Plasma Version: 5.26.5 KDE Frameworks Version: 5.101.0 Qt Version: 5.15.8 Kernel Version: 6.1.4-1-default (64-bit) Graphics Platform: Wayland Processors: 8 × AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx Memory: 29.3 Gibyte of RAM Graphics Processor: AMD Radeon Vega 10 Graphics Manufacturer: Acer Product Name: Aspire A315-41 System Version: V1.18
Thanks Linus. Do you use some scaling or High DPI setting for your OS/DE display settings? Please also paste here the info copied from Help > About LibreOffice.
Version: 7.4.3.2 / LibreOffice Community Build ID: 40(Build:2) CPU threads: 8; OS: Linux 6.1; UI render: default; VCL: kf5 (cairo+wayland) Locale: sv-SE (sv_SE.UTF-8); UI: sv-SE Calc: threaded I can reproduce the issue regardless of whether scaling is enabled or disabled.
Version: 7.4.6.2 Build ID: 40(Build:2) CPU threads: 12; OS: Linux 6.2; UI render: default; VCL: kf5 (cairo+wayland) Locale: fr-FR (fr_FR.UTF-8); UI: fr-FR Calc: threaded I can also reproduce this bug in writer and it is very annoying as the larger the documents gets, the more laggy the scroll becomes.
(In reply to linus.kardell from comment #2) > Version: 7.4.3.2 / LibreOffice Community > Build ID: 40(Build:2) > CPU threads: 8; OS: Linux 6.1; UI render: default; VCL: kf5 (cairo+wayland) > Locale: sv-SE (sv_SE.UTF-8); UI: sv-SE > Calc: threaded > > I can reproduce the issue regardless of whether scaling is enabled or > disabled. I can reproduce this, as well. It's especially worse at larger resolutions.
(In reply to jake.m.knepper from comment #4) > I can reproduce this, as well. It's especially worse at larger resolutions. Jake, can you please also paste here the information copied from Help > About LibreOffice? All: did this start in version 7.4? Are you able to test earlier versions to let us know if this is a regression? https://downloadarchive.documentfoundation.org/libreoffice/old/