Created attachment 122612 [details] The button is grayed out. SUMMARY After clicking on "install", an app is downloaded and a "cancel" button is shown. However, this button is grayed out and therefor useless. The only way to interrupt the process is to Discover. SOFTWARE/OS VERSIONS Operating System: Manjaro Linux KDE Plasma Version: 5.16.4 KDE Frameworks Version: 5.62.0 Qt Version: 5.13.0 Kernel Version: 5.2.11-1-MANJARO
This may depend on the PackageKit plugin in question (Pacman for Arch-based distros). Can reproduce though.
It is indeed an issue in alpm's backend in PackageKit. Feel free to take it there https://github.com/hughsie/PackageKit I've been looking into it and it reports cancellability for some parts so you will actually see the button flashing at times. Of course this is not acceptable but we can't also extrapolate much information from it, if the backend claims it's not possible.