Comment 42 for bug 525552

I was also affected by issue.

But thanks to thread, I found how to disable PS1 changing by byobu.

Default bash.rc enables byobu colorizing if it exists:

[ -r /home/bhs/.byobu/prompt ] && . /home/bhs/.byobu/prompt #byobu-prompt#

If line is commented, PS1 remains identical to what's set by bash of user's .bashrc setting.

Personally, I feel byobu's authors tried to make prompt better but terminal program limitations might be screwing it up :(.