[konsole] [Bug 389746] Output is garbled when many lines are printed at once

[Egmont Koblinger]

https://bugs.kde.org/show_bug.cgi?id=389746

--- Comment #6 from Egmont Koblinger <egmont at gmail.com> ---
How reproducible is this?

What's the value of $TERM outside of tmux?

I believe the first big step in debugging would be to locate whether this is a
bug in konsole/yakuake or tmux. I can easily imagine both, and not being able
to reproduce in xterm could be due to different timing of things if it's a tmux
issue.

Here's how I'd proceed:

- Take a note of the window size (e.g. "stty size").

- Start "script", and then start "tmux".

- Reproduce the bug in as few steps as possible.

- Quit tmux, then quit script (e.g. press ^D twice).

- Attach the resulting "typescript" file, and also share the window size with
us.

- We could then manually investigate whether what appears in konsole's window
matches the contents of "typescript" or not. By cutting off the end of the
"typescript" file (the bits corresponding to exiting, most notably tmux leaving
alternate screen) we should be able to deterministically reproduce the faulty
result using a simple "cat typescript" at the same terminal size, and even do
this in other terminal emulators. If by cat'ing typescript the result is the
same in all terminal emulators, namely the bad rendering, then it's tmux asking
for stupid things from konsole. If cat'ing is only broken in konsole, or is
still random (e.g. depends on timing) then it's a konsole issue.

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