The Problem:
I recently fired up Konsole and tried using tmux when I suddenly realized that Control-B wasn’t working.
Plasma, in one of their recent updates, seems to have added an “Add Bookmark” global shortcut to all Plasma apps mapped to Control-B. While it’s active, Control-B in Konsole won’t get sent to tmux, but will instead keep adding bookmarks to the Konsole Bookmarks menu.
The Fix:
Open System Settings
Under “Workspace” choose “Shortcuts”
Select “Standard Shortcuts”
Find “Add Bookmark” in the list
Change the Shortcut to Custom, then don’t assign a key sequence. This will set it to none.
![](https://i0.wp.com/www.shernet.com/wp-content/uploads/2020/04/konsole-tmux.png?resize=474%2C265&ssl=1)
Once changed, tmux should immediately start working again