Fractional scaling causes second cursor on fullscreen applications

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1

I have my screen set to 150% scale, whenever I go fullscreen on a program a second, slightly smaller (roughly the size of the 100% scale mouse) appears on the top left of the screen, it always matches the shape and hidden/unhidden status of the actual cursor. it disappears when I exit fullscreen or swap to 100% scaling. how do I fix this issue? I am using fedora 41 and KDE plasma 6.3.3 on an AMD framework laptop

2

Same issue here, with Radeon 780m integrated graphics. However it seems to only appear on the integrated display, not on an external monitor.
I am on Silverblue 41.20250316.0, so apparently a GNOME issue as well…

3

I just noticed this as well while running a fullscreen windows virtualbox vm on my Framework AMD laptop with the 780M GPU. Laptop is running Fedora Workstation 41 (gnome) 6.13.6 kernel with all updates as of today. I am also using a fractional scaling of 150%. System information:

CPU:
  Info: 8-core model: AMD Ryzen 7 7840U w/ Radeon 780M Graphics bits: 64
    type: MT MCP cache: L2: 8 MiB
  Speed (MHz): avg: 1318 min/max: 400/5132 cores: 1: 1318 2: 1318 3: 1318
    4: 1318 5: 1318 6: 1318 7: 1318 8: 1318 9: 1318 10: 1318 11: 1318 12: 1318
    13: 1318 14: 1318 15: 1318 16: 1318
Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Phoenix1 driver: amdgpu v: kernel
  Device-2: Framework Laptop Webcam Module (2nd Gen) driver: uvcvideo
    type: USB
  Display: wayland server: X.Org v: 24.1.6 with: Xwayland v: 24.1.6
    compositor: gnome-shell v: 47.4 driver: dri: radeonsi gpu: amdgpu
    resolution: 3840x2560~120Hz
  API: OpenGL v: 4.6 vendor: amd mesa v: 25.0.1 renderer: AMD Radeon 780M
    (radeonsi phoenix LLVM 19.1.7 DRM 3.61 6.13.6-200.fc41.x86_64)
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
  Info: Tools: api: clinfo,glxinfo gpu: radeontop x11: xdriinfo, xdpyinfo,
    xprop, xrandr
4

Just rebased to silverblue 42 beta, and it still happens there. I can reliably trigger it when putting firefox into fullscreen-mode, then switching in GNOME to another workspace and then switching back again - and the cursor appears (But only when using 150% scaling). Does anyone have any idea on either how to debug this to file a bug or an idea for a fix whatsoever?

5

I am not sure my problem is the same, but seems like it. I sometimes get a small version of the mouse curser, and sometimes other artifacts. I just now had a guest VM in fullscreen mode and all of the icons on the gnome dock were pixelated with random colors.

I am not quite sure how to troubleshoot either, but I do have a couple mesa libraries from rpmfusion that I will revert back to the standard fedora ones. If that does not resolve. I will probably revert to the 24.x.x version of mesa and test. If I had to guess, I am betting it is an issue with mesa, but I am not sure. I probably poke around on the mesa issue tracker and see if someone has reported anything similar.

6

Looks like this may be related to mesa issue #12809.