https://bugs.kde.org/show_bug.cgi?id=466299
Bug ID: 466299 Summary: Window previews for task manager icons showed the wrong colours when using the llvmpipe driver Classification: Plasma Product: plasmashell Version: 5.27.0 Platform: Fedora RPMs OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: Task Manager and Icons-Only Task Manager Assignee: plasma-b...@kde.org Reporter: matt.fagn...@bell.net Target Milestone: 1.0 Created attachment 156640 --> https://bugs.kde.org/attachment.cgi?id=156640&action=edit Recording of wrong window preview colours in VM using llvmpipe SUMMARY I booted the Fedora 38 KDE Plasma live image Fedora-KDE-Live-x86_64-38-20230221.n.1.iso in a QEMU/KVM VM using GNOME Boxes with 3D acceleration disabled using the llvmpipe driver from mesa-dri-drivers-23.0.0~rc4-3.fc38.x86_64. Plasma 5.27.0 on Wayland started. I started Konsole, Firefox, Dolphin, System Settings. I moved the mouse cursor over the icons in the task manager for those programs. The window previews in the tooltips for those task manager icons showed the wrong colours. For Konsole, the main part of the window preview was shown as purple when it was really black. Purple, blue and other coloured stripes were shown on the Firefox preview which weren't shown in Firefox. The Dolphin preview had light blue on its left and top parts which were actually grey. The right panel of System Settings' preview was blue when it was grey. I'm attaching a recording which shows this problem. This problem always seems to happen when using the llvmpipe driver. I booted the same image on bare metal from a USB flash drive using Troubleshooting > Start Fedora-38-KDE-Plasma in basic graphics mode in grub which uses the llvmpipe mesa driver and simpledrm kernel driver. The same sort of incorrect colours were shown for those programs' previews in the task manager using the llvmpipe driver on bare metal. The problem didn't happen in VMs with 3D acceleration enabled using the virgl mesa driver, and on bare metal using the radeonsi mesa driver and virtio-gpu kernel driver. The problem might be specific to llvmpipe. STEPS TO REPRODUCE 1. Boot a Fedora 37 KDE Plasma installation updated to 2023-2-22 with updates-testing enabled 2. Log in to Plasma 5.27.0 on Wayland from sddm 3. Download Fedora-KDE-Live-x86_64-38-20230221.n.1.iso from https://koji.fedoraproject.org/koji/buildinfo?buildID=2157026 4. Install GNOME Boxes if it isn't already with sudo dnf install gnome-boxes 5. Start GNOME Boxes 6. boot the Fedora 38 KDE Plasma live image Fedora-KDE-Live-x86_64-38-20230221.n.1.iso in a QEMU/KVM VM using GNOME Boxes with 3D acceleration disabled using the llvmpipe driver 7. Start Konsole in the VM 8. Start Firefox in the VM 9. Start Dolphin in the VM 10. Start System Settings in the VM 11. Hover the cursor over the task manager icons for Konsole, Firefox, Dolphin, and System Settings so that their small window previews are shown OBSERVED RESULT Window previews for task manager icons showed the wrong colours when using the llvmpipe driver EXPECTED RESULT Window previews for task manager icons showed the correct colours when using the llvmpipe driver SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 38 (available in About System) KDE Plasma Version: 5.27.0 KDE Frameworks Version: 5.103.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION -- You are receiving this mail because: You are watching all bug changes.