I use tmux 1.8 with putty. I often copy stuff to the tmux paste buffer using mouse select and then paste using middle click. However, on a new computer, the following issue is happening: when I click the middle mouse button on different panes, it only works on one of them and fails to paste in the rest. The oddest thing is that the one pane I can paste in is the first pane in that window and I can't paste in any of the others, regardless of which pane I copied from.

1 Answer 1


How wide is your terminal? Standard mouse mode only supports a limited number of columns and 1.8 may be too old for SGR mode.

  • How can I find out the width of the terminal?
    – N M
    May 20, 2019 at 7:21
  • echo $COLUMNS aa May 20, 2019 at 7:23
  • My old setup which was working without issues had 346 columns on a maximized tmux while my new one has 318 columns. I normally work with an equal vertical split
    – N M
    May 20, 2019 at 7:26
  • Are you running tmux in the same terminal and the same terminal version? May 20, 2019 at 9:01
  • I moved from kitty to putty but everything else should be the same
    – N M
    May 21, 2019 at 5:24

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