Mouse cursor is flipped / inverted / upside-down with virtio-gpu in some Wayland compositors
## Host environment - Operating system: Arch Linux - OS/kernel version: 6.8.1 / 6.6.14 / older - Architecture: x86_64 - QEMU flavor: qemu-system-x86_64 - QEMU version: 9.0.0 / 8.2.2 / older - QEMU command line: ```sh #!/bin/bash -e # shellcheck disable=SC2054 args=( -name "ArchKDE" -machine q35 -cpu host -smp 8 -m 4G -usb -device usb-tablet -chardev socket,id=char1,abstract=on,path=virtiofs-archkde -device vhost-user-fs-pci,queue-size=1024,chardev=char1,tag=root -kernel /run/ssd/archkde-rootfs/boot/vmlinuz-linux-lily -append 'rootfstype=virtiofs root=root rw' -initrd /run/ssd/archkde-rootfs/boot/initramfs-linux-lily.img -device virtio-vga-gl,max_hostmem=2G -display gtk,gl=on -object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on -numa node,memdev=mem ) exec qemu-system-x86_64 -enable-kvm "${args[@]}" "$@" ``` This script uses a virtiofs but it also happens with a regular qcow2 file (I just don't have one at hand). This happens with both the GTK UI and SPICE (using the spicy binary). ## Emulated/Virtualized environment - Operating system: Arch Linux - OS/kernel version: 6.8.1 - Architecture: x86_64 - Wayland compositor: wlroots-based / kwin 6.0.4.1 ## Description of problem The mouse cursor is flipped: ## Steps to reproduce 1. Install a Linux system with a 6.8.x kernel inside the virtual machine 2. Install sway / wayfire / hyprland, or kwin 6.0.4.1 3. See the mouse cursor ## Additional information The [kwin fix](https://invent.kde.org/plasma/kwin/-/commit/a31561c392adf5abcda0284e8049fafcb3701585) just makes use of dumb buffers instead of dmabuf. The mouse cursor should be pointing to the maximizing button at the top-right corner: ![Screenshot](/uploads/f1c3db2129955159e9ce765dd29ae9eb/a.png)
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