SUMMARY I am addressing the default Breeze cursors, I could not check any additionally installed cursors, because mine do not go above size 48. STEPS TO REPRODUCE 1. Set cursor size above 48 2. Hit apply or logout/in or reboot and log in. OBSERVED RESULT Seems like only the upper right quarter of the cursor is shown is shown (with a "deinterlace" effect or "zebra crossing" from top to bottom or vertical lines in betwixt) EXPECTED RESULT Usable cursor. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6 5 0 KDE Plasma Version: 6 5 0 KDE Frameworks Version: the first one after 6.5 upgrade Qt Version: 6.10* ADDITIONAL INFORMATION Enabled shake cursor effect. (also observed the bug when off) Better Blur effect. (also observed the bug when off) Klassy window decorations. Bug also observed on X11.
I can't reproduce this myself. What kind of GPU are you using? Is it an older AMD GPU?
(In reply to Nate Graham from comment #1) > I can't reproduce this myself. What kind of GPU are you using? Is it an > older AMD GPU? Thanks for your quick reply. No, a very old Nvidia one, nouveau-driven. NVD9 (Geforce 410M). I will reply once more if a .cache removal followed by a reboot solves it.
It does not happen on X11, correction! However, flickering cursor but I think that's always been the case. It does not happen because of the environment variables I had set KWIN_DRM_NO_AMS=1 or KWIN_FORCE_SW_CURSOR=0 or KWIN_FORCE_SW_CURSOR=1 ; I put them off now and rebooted. KWIN_DRM_NO_AMS=1. It does happen on a new user on Wayland. The only thing I can imagine what I altered cursor-wise is some file with Inherits=Breeze_snow, to get a persistent cursor on Flatpak. Maybe I gotta go that route?
Can you be clear about what exactly you changed? Does it happen with a default, unchanged cursor theme?
*** This bug has been marked as a duplicate of bug 510930 ***
(In reply to Nate Graham from comment #4) > Can you be clear about what exactly you changed? (2) Does it happen with a > default, unchanged cursor theme? (1) 1) Yes it happens on a test user, but it is fine up to cursor size 48! 2) I set env. variables because I had a slower mouse in stacked windows, with the BetterBlur github effect https://github.com/taj-ny/kwin-effects-forceblur , where it is mentioned at the very bottom: in /etc/environment ... "High cursor latency or stuttering on Wayland This effect can be very resource-intensive if you have a lot of windows open. On Wayland, high GPU load may result in higher cursor latency or even stuttering. If that bothers you, set the following environment variable: KWIN_DRM_NO_AMS=1. If that's not enough, try enabling or disabling the software cursor by also setting KWIN_FORCE_SW_CURSOR=0 or KWIN_FORCE_SW_CURSOR=1." I uncommented these 2 lines now. And now these slow-laggy-cursor issues are much better on 6.5 so that's a big plus: it is very fine for 3 or 4 stacked windows. But the 48+ bug is still there. Somewhere down the lines I changed a config file to have a (consistent) Breeze Snow cursor on Flatpak browsers: /usr/share/icons/default/index.theme and put Inherits=breeze_snow But as I see this has no influence on the bug I am facing (uncommented, rebooted) 3) Thanks for duplicate-mentioning, those lines in that pic I observe too on the panel (floating if that's a useful info)
observe too * around the cursor * on the panel. I can screenshot the cursor too if needed.