https://bugs.documentfoundation.org/show_bug.cgi?id=172985
--- Comment #4 from Martin Frantzen <[email protected]> --- Thanks for testing. I have now found an important additional condition for reproducing the issue: fractional display scaling. My KDE Plasma display scaling is set to 125%. When I switch the display scaling to 100%, the grid lines are rendered correctly. Switching back to 125% makes the issue reappear. So the issue seems to require the combination of the Qt6/KF6 Wayland backend and fractional display scaling. My environment: Distribution: Arch Linux LibreOffice: 26.2.5.2 / Arch package 26.2.5-1 Desktop: KDE Plasma 6.7.3 Session: Wayland Qt: 6.11.1 Display scaling: 125% VCL qt6/kf6: issue reproducible SAL_USE_VCLPLUGIN=gtk3: issue does not occur QT_QPA_PLATFORM=xcb: issue does not occur Plasma scaling 100%: issue does not occur Plasma scaling 125%: issue occurs The issue is independent of Calc's document zoom level; I tested 100%, 120% and 200%. I have already attached a screenshot showing the rendering issue. Please let me know if there is any specific diagnostic output or additional system information that would be useful. ❯ lspci -k | grep -EA3 'VGA|3D|Display' 00:02.0 VGA compatible controller: Intel Corporation Alder Lake-P GT2 [Iris Xe Graphics] (rev 0c) Subsystem: Dell Device 0b19 Kernel driver in use: i915 Kernel modules: i915, xe -- 01:00.0 3D controller: NVIDIA Corporation GA107M [GeForce RTX 3050 Ti Mobile] (rev a1) Subsystem: Dell Device 0b19 Kernel driver in use: nvidia Kernel modules: nouveau, nvidia_drm, nvidia ❯ uname -a echo $XDG_SESSION_TYPE plasmashell --version Linux ael-xps 7.1.8-arch1-3 #1 SMP PREEMPT_DYNAMIC Tue, 11 Aug 2026 09:16:08 +0000 x86_64 GNU/Linux wayland plasmashell 6.7.4 -- You are receiving this mail because: You are the assignee for the bug.
