[Konsole-devel] [konsole] [Bug 323375] New: Konsole KPart (at least, in yakuake) doesn't emit the bell signal when triggered inside tmux

[Vadim A. Misbakh-Soloviov (mva)]

https://bugs.kde.org/show_bug.cgi?id=323375

            Bug ID: 323375
           Summary: Konsole KPart (at least, in yakuake) doesn't emit the
                    bell signal when triggered inside tmux
    Classification: Unclassified
           Product: konsole
           Version: 2.10.5
          Platform: Gentoo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: kpart
          Assignee: konsole-devel at kde.org
          Reporter: mva at mva.name

Hi!
Some time ago I discovered, that Konsole KPart, that Yakuake uses, somewhy
doesn't emit visual bell when that signal triggered inside tmux (terminal
multiplexer, like GNU/screen).

Mostly strange, that bell works fine in Konsole itself, and also in KPart
*outside* tmux.

P.S. I've tested with:
$ sleep 2; printf '\007'
and
$ sleep 2; printf '\a'

Reproducible: Always

Steps to Reproduce:
1. Run, for example (!), Yakuake
2. type «printf '\007'» or «printf '\a'»
3. run tmux
4. type bell's printf command once more
Actual Results:  
There is no visual bell inside tmux, but it *is* outside.

Expected Results:  
Bell works inside tmux as well as outside.

1) bell works either inside or outside tmux in Konsole itself, but not in
KPart, that Yakuake uses.

2) [cut of my discussion with tmux developers]
2013-07-29 23:46:35     thomas_adam     mva: So get a terminal emulator which
respects the bellUrgencyHint, and then you will.  XTerm does, for example.
2013-07-30 02:14:22     mva     thomas_adam: isn't my terminal support
bellUrgencyHint, if it detects \a? ;)
2013-07-30 02:25:32     thomas_adam     mva: You said you wanted your terminal
to notify you if tmux emits a BEL, yes?  Certain terminal emulators allow for
setting the XUrgencyHint when such a thing happens, via an option usually
called urgentOnBell; this is what XTerm calls it, other terminal emulators will
differ.  If you're then using a decent window manager, then those will pick up
on that fact and do something accordingly, such as make the window border red,
or popup some ...
2013-07-30 02:29:33     mva     uhm... to be clear: I'm using konsole. It
catches shell beeps, "\a" and so on bells pretty fine and can ask window
manager to visualise it, or send notify-popup, if tab is inactive. But I can't
get it to work with tmux :-/ So, yes, I asking exactly that, but I dunno what
should I check :/
2013-07-30 02:33:40     NicM    well
2013-07-30 02:34:42     NicM    my tmux sends bells through by default
2013-07-30 02:34:47     NicM    ie, it works for me
2013-07-30 02:35:06     NicM    sleep 2;printf '\007' inside tmux and it sends
a bell
2013-07-30 02:36:35     NicM    if you turn on visual-bell are you seeing the
messages?
2013-07-30 02:37:59     mva     NicM: yes
2013-07-30 02:38:46     thomas_adam     Try it in XTerm.
2013-07-30 02:38:55     thomas_adam     I wonder if Konsole is being stupid.
2013-07-30 02:41:06     NicM    well it sounds like something is wrong outside
tmux
2013-07-30 02:41:23     thomas_adam     mva: xterm -xrm 'xterm*bellIsUrgent:
true'
2013-07-30 02:41:45     thomas_adam     mva: But tmux is doing the right
thing---no surprise there, it works for me.
2013-07-30 02:42:08     thomas_adam     mva: So I'd first rule out your
terminal emulator, and go from there.
2013-07-30 02:44:22     mva     uhm, lol. I've little bit disinformed: konsole
itself catches bells from tmux (as I checked just now). But Yakuake (which uses
konsole's terminal engine) somewhy doesn't... So, thanks and sorry, I'll try to
report that to Yakuake :-/
[/cut]

3) actually, I thought to create bug against Yakuake, but after discussion with
Sho (Eike Hein) in IRC I changed my minde that it is possibly KPart bug.

4) bell works fine inside GNU/screen

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