F2 to F4 does not work in Gentoo

Neither was I until recently, and this behaviour was annoying the hell out of me, so I tracked it down to what solves it for me.

The issue is in /etc/screenrc. Gentoo has a block of lines in it that reads something like this:

...
# tell screen that xterm can switch to dark background and has function
# keys.
  termcapinfo xterm 'VR=\E[?5h:VN=\E[?5l'
  termcapinfo xterm 'k1=\E[11~:k2=\E[12~:k3=\E[13~:k4=\E[14~'
  termcapinfo xterm 'kh=\EOH:kI=\E[2~:kD=\E[3~:kH=\EOF:kP=\E[5~:kN=\E[6~'
...

That second termcapinfo line is remapping F1-F4. I'm not sure why, I think it has something to do with the change in xterm. I'm not sure why, nor do I really care. The Ubuntu /etc/screenrc doesn't do this.

You could comment it out, but on a Gentoo system I would advocate changing ~/.byobu/keybindings to read like this instead:

...

source /usr/share/byobu/keybindings/common

# Since profile is a symlink, but it source the keybindings file,
# I'm using this for my own nefarious purposes

# We don't need the shell to be a login shell
shell "$SHELL"

# Fix the retarded F1-F4 key mappings in screenrc
#termcapinfo xterm 'k1=\E[11~:k2=\E[12~:k3=\E[13~:k4=\E[14~'
termcapinfo xterm 'k1=\EOP:k2=\EOQ:k3=\EOR:k4=\EOS'

...

The shell definition is to allow me to put && exit 0 after the byobu launch line added to ~/.profile if you want it to start properly.

Also, if you want bash-completion to work properly, you'll want to move /etc/profile.d/bash-completion.sh to /usr/local/bin/ , and add something like this to your ~/.bashrc file:

...

# Put your fun stuff here.

# Source bash_completion
if [ -f /usr/local/bin/bash-completion.sh ] && ! shopt -oq posix; then
    . /usr/local/bin/bash-completion.sh
fi

...

This is what I had to do to a Gentoo system to get it to behave like the Ubuntu systems I'm used to using byobu on. Hopefully this helps some.