https://bugs.documentfoundation.org/show_bug.cgi?id=152911
--- Comment #23 from [email protected] --- I have this issue in Plasma 6, Wayland, NixOS Unstable 24.11 (all up to date), Intel UHD graphics. LO Version Info: Version: 24.2.3.2 (X86_64) / LibreOffice Community Build ID: 420(Build:2) CPU threads: 8; OS: Linux 6.8; UI render: default; VCL: kf5 (cairo+wayland) Calc: threaded It is not a fractional scaling issue, it is a window size issue – scaling may make it worse but it happens regardless. A larger window means more lag, but at least for me some lag is still present even on a small window, single monitor, it just doesn't make scrolling unusable like it does on a larger window size. The size of the document also makes no difference to me; I get the same lag on an empty document as a 30 page one filled with text. Lag does not affect moving between pages by moving the cursor, including pg up/dn, only scrolling using scroll wheel on mouse or two finger scroll on trackpad, or scrolling by dragging scroll bar. I can't really tell for sure if middle click scrolling is the same, it seems like it is just scrolling very slow even when it should be scrolling at speed. I have tried the GTK version of LibreOffice and had the same issue (in Plasma 6). I wonder if enabling OpenCL would fix this, but I have never been able to get LO to use OpenCL despite other apps (e.g. DaVinci Resolve) being able to use it just fine and clinfo saying I have two OpenCL platforms installed. I have installed every driver related to OpenGL or OpenCL I could find. This page https://ask.libreoffice.org/t/unable-to-activate-opencl/45714/6 suggests the driver(s) may not be whitelisted properly? I didn't understand most of this. Final note: Fractional scaling is not good regardless of this particular issue. Based purely on how the font rendering looks, fractionally scaled windows *seem* to be downscaled from a higher integer scaled resolution. This is a separate issue that should be fixed, but it to me explains why fractional scaling makes this worse in the same way increasing the window size does, because using fractional scaling is analogous to increasing the window size (then downscaling). -- You are receiving this mail because: You are the assignee for the bug.
