Paste on MMB using multi-touch gestures

[staseg]

Hi, guys!
I am using Linux Mint 18.3 KDE for more than month on my desktop and a week on laptop, and I am almost fully satisfied.
I faced some problems on laptop (Dell XPS 15 9550).
I see no way to disable Paste on MMB click. I have seen a topic in forum, but I see no answer.
It is really useful feature, but on my laptop I use libinput-gextures (multi-touch gestures for linux), and 3-point gestures (I used them to switch desktop) are also recognized as paste.
For example, I am looking some info in browser, then I switch to desktop with Qt and my copy buffer pastes some mess in my code.

Reviewing forums, I noticed, that it is a feature of X11, and it is impossible to turn it of, using config, it is hardcoded.
So:
Can somebody fix it?
How to fix it in X11 code?

[catweazel]

I am using Linux Mint 18.3 KDE for more than month on my desktop and a week on laptop, and I am almost fully satisfied.
...
How to fix it in X11 code?

This has nothing to do with KDE. The X standard states that the middle mouse button executes a paste action, so this action applies to all OSen using X.

https://wiki.ubuntu.com/X/Config/Input# ... el%20mouse

I think that the best you can do is try to remap the button. See the section titled "Example: Disabling middle-mouse button paste on a scrollwheel mouse".

[staseg]

Thank you, but the way, they go (remapping MMB) we disable MMB at all. For example, we can't open new tab in browser by MMB.

[Hoser Rob]

... Can somebody fix it?
How to fix it in X11 code?

You're going to have to convince the Xorg and/od KDE devs it's a bug at all. Good luck.