Hi,With my DEC vt510, I have observed that when I hit C-u in copy mode (page up), it performs that action and then enters I-search mode uncommanded. I-search mode is activated with C-s, which is also the XOFF character.
I have set "defflow on" in .screenrc, and have also verified via :info that the session is +flow. However, screen seems to not be honoring XON/XOFF flow control while in copy mode.
Thanks, John
