@b4n approved this pull request.

At first I thought you were silly indeed, because I couldn't reproduce the issue with a very simple build, and because I know the GTK API doesn't pulsate by itself, so it didn't make sense to me (and your OP wasn't clear enough for me to understand what's actually going one).

But then I tried with something a little heavier, meaning the progress bar had actually something more to do than merely maybe flashing, and I then could see it. Then going over the progressbar sources, I understood what you meant by "tick", and why it actually made sense. For the interested: although pulse steps have to be asked for explicitly (the progress bar doesn't simply start moving by itself), it still animates between pulse steps with a frame clock callback. However, it seems it's not shut off when the progressbar gets hidden. Setting a fraction value indeed leaves the so-called internal "activity mode" and disables the frame clock callback.

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