I have two computers with the latest Fedora. On the first, I'm using zsh and the mouse wheel can be used with the less pager within gnome-terminal to scroll the pager.
On the second, I use bash and the mouse whell scroll the terminal history, not the pager.
The shell shouldn't make any difference, why can't I use the mouse wheel to scroll in the second case?
To illustrate what it does, imagine I have a document like this:
AAAA BBBB CCCC DDDD EEEE
And I have a two line terminal. If I use less, I get on the screen
The mouse wheeel cannot scroll further down. If I scroll upwards, I get the bash prompt history. Now I use the page down key to get to the bottom of the document, I get on screen:
Scrolling upwards gets me