[kde] [Bug 504487] [ANR] Closing the "Keyboard Shortcuts" window whilst it is waiting for the "Print" window to appear causes a crash.

[Roke Julian Lockhart Beedell]

https://bugs.kde.org/show_bug.cgi?id=504487

--- Comment #16 from Roke Julian Lockhart Beedell <4wy78uwh at rokejulianlockhart.addy.io> ---
Created attachment 181687
  --> https://bugs.kde.org/attachment.cgi?id=181687&action=edit
A Screencast Demonstrating That This Affects All Qt 6 Applications

(In reply to Roke Julian Lockhart Beedell from comment #11)

> I suppose we can consider CUPS the most *significant* culprit, but on Windows, this is instantaneous, so there's more at play.

Per [`bbs.archlinux.org/viewtopic.php?pid=1279792#p1279792`][1], I've
ascertained that the cause is `avahi-daemon.service` (or, at least, its default
configuration). Consequently, I have filed
https://github.com/avahi/avahi/issues/701#issue-3087466051 to, hopefully,
replace this. If not, it's at worst a Qt issue, rather than a KDE one, since it
affects a custom PyQt6 application of mine, too.

[1]:
https://bbs.archlinux.org/viewtopic.php?pid=1279792#p1279792:~:text=but%20after%20I%20setup%20my%20network(with%20help%20of%20a%20question%20created%20by%20me%20on%20unix.stackexchange.com)%20I%20discovered%20that%20problem%20isn't%20cups%20and%20isn't%20network%2C%20the%20problem%20is%20the%20avahi%2Ddaemon%2C%20if%20it's%20runnig%20the%20cups%20is%20slow%2C%20if%20it%20isn't%20cups%20is%20normal...

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