SUMMARY Message contents not rendered in the UI, but invisible text can be selected and copy-pasted or dragged. KMail UI does not render the contents, though STEPS TO REPRODUCE 1. Open KMail 2. Click on a message in the list 3. Try to read message contents OBSERVED RESULT Nothing renders on screen. EXPECTED RESULT Message renders on screen. SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20250909 KDE Plasma Version: 6.4.4 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.2 Kernel Version: 6.16.5-1-default (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 3600 6-Core Processor Memory: 32 GiB of RAM (31,3 GiB usable) Graphics Processor: AMD Radeon RX 580 Series Manufacturer: Micro-Star International Co., Ltd. Product Name: MS-7B79 System Version: 4.0 ADDITIONAL INFORMATION Changing UI layout makes no change. Starting Kmail from command line, I see the following: lassi@kaappi:~> kmail org.kde.pim.pimcommonactivities: Plasma activities is not running: 1 kf.windowsystem: KWindowInfo is only functional when running on X11 Backend texture is not a Vulkan texture. Compositor returned null texture Backend texture is not a Vulkan texture. Compositor returned null texture Backend texture is not a Vulkan texture. Compositor returned null texture
Ok, something related to KMail mail renderer and Wayland. On X11 it works.
Also, this text gets printed in the console for each message I select from the list: Compositor returned null texture Backend texture is not a Vulkan texture.
*** This bug has been marked as a duplicate of bug 508479 ***