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After upgrading to El Capitan, my tmux scrollback buffer is limited to a single screen. If I scroll up, I can see output from Mac Terminal, but all tmux output is truncated.

In the screenshot, you can see that instead of the expected display of me ls-ing, it shows me calling tmux - the last thing I did in OSX Terminal.

I have set -g history-limit 100000 in my tmux.conf, but that file hasn’t changed from Yosemite to El Capitan.

Truncated ls output, with tmux call

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After echo $TERM revealed that paging was still handled by screen, I created ~/.screenrc and inserted termcapinfo xterm* ti@:te@. This allowed scrolling as desired.

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    what does this do? I'm having a similar issue where when I change tmux's history size it seems to be capped at around 9000 after a certain point. I'm using gnome-terminal not xterm (unsure if that is relevent)
    – JonnyRaa
    Oct 15, 2018 at 16:55

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