SUMMARY On Wayland (Plasma 5.18.4), the Kmail main window is frozen when I try to scroll through folders or message list. I have to minimize and maximize it again to make the view refresh. The menu bar works fine though. STEPS TO REPRODUCE 1. Start Kmail on a Plasma Wayland session 2. Try to scroll through folders for example 3. Nothing seems to happen unless you minimize and display the Kmail window again OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.18.4 KDE Frameworks Version: 5.69 Qt Version: 5.14.2 ADDITIONAL INFORMATION
Moving the mouse cursor around seem to refresh the view, too.
The problem still occusrs in Plasma 5.19 beta.
I don't know if this is of any help, but I just discovered that you can get the same kind of glitch in Firefox Wayland when setting widget.wayland_vsync.enabled to true in about:config.
I think I have the same bug on a Wayland session: Clicking on a different mail/folder doesn't highlight the selected folder/mail; I have to move the cursor around. Moreover, there are like 2 or three mails at the bottom of the mail list, that stay there even after selecting another folder. Am using the classic folder list w/o preview. KDE Plasma Version: 5.19.4 KDE Frameworks Version: 5.72.0 Qt Version: 5.15.0 Kernel Version: 5.7.12 Graphics Processor: Intel® HD Graphics Mesa 20.1.4
This is fixed in Plasma 5.20, thanks !