Linux, KDE Plasma 6: Can't edit/type text in Redux in Reaper

I think I have stumbled upon a bug in Redux, in the Script editor for Phrases (tested on Linux). Even though the editor takes focus and I can move the cursor either with the mouse or the arrow keys, I can’t enter any alphanumeric characters. The only keys that work are Enter, Tab, Backspace, Delete, as well as combinations such as Ctrl+C or Ctrl+V. The only workaround is to write the script in a text editor then copy and paste it into the Script editor.
I should mention that this does not occur in the equivalent section of Renoise, only in the Redux plugin (loaded in either Reaper or Renoise - I can’t test this in any other DAWs as I only have these two). My system runs Arch Linux, with Wayland and KDE. All packages are up to date. It might be worth checking whether the scope of this is limited to my configuration, or applies to other setups or OSs.

Text focus in plugins is tricky - problems unfortunately are expected here. I guess the same happens in other text fields as well in Redux?

Do keys in the phrase pattern editor work for you on that setup?

I’ll see if I can replicate this in KDE. Which version of KDE are you using exactly?

Maybe they will come through here but a user on discord reported similar issues for Redux under Bitwig.

Redux script editing works in Ableton, but in Bitwig Redux appears to send space (and ctrl, maybe other keys) through to the host instead so e.g. Space starts and stops Bitwig rather than adding a space char in the Redux editor (Windows 11, Bitwig 5.3.12)

Seems relevant, if not, feel free to move/delete.

Yes, it’s a different, but still relevant issue: Some hosts will try to steal/handle some specific keys and won’t send them to the plugin. Guess we’ll need a little help from them to fix this on all platforms or look for other workarounds.

Some text boxes work, most don’t. For instance, the search box in the top instrument select dropdown works, but the save box in the right pane (Instrument, Samples, Other) doesn’t work. Same for the editable path (I can delete it but I can’t enter a new path).

Keys in the phrase pattern editor work.

My KDE Plasma version is the latest (6.4.2).

Thanks for looking into this!

Only had the chance to test on KDE Plasma 5.24 but there things seems to work fine.
Will try to get my hands on the latest KDE Plasma and test this again.

Has anyone else on KDE the same problems - or not?

Running Redux in Reaper in Arch.
Plasma 6.4.2 - Wayland. The keys won’t work here, too. Cursors do, but not letters.

Got my hands on a Linux arch using the latest KDE plasma now and can now also replicate this.

As soon as you hold down a modifier key, the keys works fine. So Alt + A-Z works, but not A-Z. This is just weird and likely a bug in KDE. This only happens with the override_redirect windows that open up when editing text, but those are unfortunately needed to get keys working with Bitwig. Bitwig else redirects keys such as Space to itself.

I’ll see if I can report this to the plasma devs, but would need to create a litte example project for that - which will take a while to create - or will try to simply hack around that…

This actually is a security feature of KDE plasma.

By default X11 apps are not allowed to read (and receive in our case) keys.

Change the following setting and this should work:

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