Created attachment 172497 [details] recording of the problem for the Firefox and Konsole window previews SUMMARY I booted the Fedora Rawhide KDE live image Fedora-KDE-Live-x86_64-Rawhide-20240810.n.0.iso in a QEMU/KVM VM in GNOME Boxes with 3D acceleration disabled using the llvmpipe driver from mesa 24.2.0-rc4 and virtio-gpu 6.11-rc2 kernel driver in a Fedora 40 KDE installation. Plasma 6.1.3 on Wayland started. I started Konsole, Firefox, and other programs. When I hovered over the Konsole, Firefox and other icons in the task manager, the window previews were corrupted with black areas and/or horizontal lines as different previews were shown. The window previews also looked blurry and the text in them was illegible. I'm attaching a recording of the problem for the Firefox and Konsole window previews. I reproduced this problem with the same image on bare metal in basic graphics mode using nomodeset on the kernel command line using the llvmpipe driver and simpledrm kernel driver. The problem didn't happen in a VM with 3D acceleration enabled using the virgl driver and virtio-gpu kernel driver or on bare metal with the radeonsi mesa driver and amdgpu kernel driver. The problem might be specific to llvmpipe. STEPS TO REPRODUCE 1. Download the Fedora Rawhide KDE live image Fedora-KDE-Live-x86_64-Rawhide-20240810.n.0.iso from https://koji.fedoraproject.org/koji/buildinfo?buildID=2524587 2. install GNOME Boxes in a Fedora 40 KDE installation if it isn't already with sudo dnf install gnome-boxes 3. Boot Fedora-KDE-Live-x86_64-Rawhide-20240810.n.0.iso in a QEMU/KVM VM in GNOME Boxes with 3D acceleration disabled 4. Start Konsole and Firefox in Plasma 6.1.3 in the VM 5. Hover over and off Konsole and Firefox's icons in the task manager until their window previews are shown repeatedly until the problem happens OBSERVED RESULT Window previews were corrupted when using the llvmpipe driver EXPECTED RESULT Window previews should've been shown normally when using the llvmpipe driver SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora Rawhide/41 (available in About System) KDE Plasma Version: 6.1.3 KDE Frameworks Version: 6.4.0 Qt Version: 6.7.2 ADDITIONAL INFORMATION The plasmashell crashes which sometimes happened when showing window previews with Plasma 6.1.3 and mesa 24.1.4 I reported at https://bugs.kde.org/show_bug.cgi?id=490844 didn't happen with Plasma 6.1.3 and mesa 24.2.0-rc4 in Fedora-KDE-Live-x86_64-Rawhide-20240810.n.0.iso.
Sorry this happened. I've just corrected the version number, so at least that's fixed now! Are you still seeing this issue happen in Plasma 6.5.4 or later?
(In reply to Nate Graham from comment #1) > Sorry this happened. I've just corrected the version number, so at least > that's fixed now! Are you still seeing this issue happen in Plasma 6.5.4 or > later? I reproduced this problem in Plasma 6.5.3 in a Fedora 43 KDE installation on bare metal using nomodeset on the kernel command line using the llvmpipe driver and simpledrm kernel driver. The problem didn't happen in Plasma 6.5.3 in a Fedora Rawhide KDE live image VM using the llvmpipe driver and virtio-gpu kernel driver. 6.5.4 isn't available as an update in Fedora yet, but I'll test that when it is. Thanks.