in reply to Second background process is pausing the gui

I am unfamiliar with using Tk, but this looks odd to me, what is it providing to your application - open (STDIN, "< /dev/null"); ? Is that a Tk idiom?

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Re^2: Second background process is pausing the gui
by marto (Cardinal) on Jun 11, 2020 at 06:41 UTC

    "Is that a Tk idiom?"

    No, though your favourite search engine will likely return an explanation.

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