SUMMARY I believe KNotification::DefaultEvent is the cause STEPS TO REPRODUCE 1. Get a portal notification OBSERVED RESULT No sound, like with other notifications EXPECTED RESULT There's sound SOFTWARE/OS VERSIONS Operating System: NixOS 22.11 KDE Plasma Version: 5.26.3 KDE Frameworks Version: 5.99.0 Qt Version: 5.15.7 Kernel Version: 6.0.7-zen1 (64-bit) Graphics Platform: Wayland Processors: 8 × AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx Memory: 5.7 GB of RAM Graphics Processor: AMD Radeon Vega 8 Graphics ADDITIONAL INFORMATION xdg-desktop-portal-kde provides notifications from applications, DefaultEvent is not for standard KDE notifications according to he documentation
*is for standard KDE notifications
*** Bug 462357 has been marked as a duplicate of this bug. ***
A workaround was given by a Telegram contributor here: https://github.com/telegramdesktop/tdesktop/issues/25469#issuecomment-1329483514 sudo sed -i 's/org.freedesktop.impl.portal.Notification;//' /usr/share/xdg-desktop-portal/portals/kde.portal systemctl --user restart xdg-desktop-portal This requires xdg-desktop-portal-gtk to be installed.
*** This bug has been marked as a duplicate of bug 457672 ***