DTMF tones not being generated locally

This may be a timing thing depending on how fast you type, it does not seem very consistent.
It definitely does not occur when long deliberate presses are used.

Turned debug on in ofonod then
tail -f /var/log/syslog | grep DTMF

You will often see the number of the phone app UI but not in the log

tones need to be generated and played back in the local headset

Status changed to 'Confirmed' because the bug affects multiple users.

Add a new bug to track comment #1 which is not related to the tones per se bug #1268648

I'm not sure if this is directly helpful, but:

Sailfish OS and the Jolla phone use the tone generator daemon [1] for local playback of DTMF sounds. These D-Bus calls start and stop playing a DTMF tone that is equivalent to pressing key '5' during a voice call:
  dbus-send --system --type=method_call --dest=com.Nokia.Telephony.Tones /com/Nokia/Telephony/Tones com.Nokia.Telephony.Tones.StartEventTone uint32:5 int32:0 uint32:1000
  dbus-send --system --type=method_call --dest=com.Nokia.Telephony.Tones /com/Nokia/Telephony/Tones com.Nokia.Telephony.Tones.StopTone

tone-generator has its origin in Nokia Maemo / MeeGo, and is LGPL-licensed. From a quick glance, tone-generator seems to depend only on PulseAudio, GLib/GObject and D-Bus. It should be possible to use it (or parts of it) on Ubuntu.

For reference, in Sailfish OS the tone generation daemon is used by 'voicecall manager' ([2] , roughly equivalent to Ubuntu's telephony-service) for DTMF sounds, and by telepathy-ring ([3], roughly equivalent to Ubuntu's telepathy-ofono) for call event sounds and, in some circumstances, for alerting sounds.

[1] https://github.com/nemomobile/tone-generator
[2] https://github.com/nemomobile/voicecall/blob/master/plugins/tonegend/src/tonegeneratorplugin.cpp
[3] https://github.com/nemomobile/telepathy-ring/blob/master/modem/tones.c

Actually, tone-generator works as-is on Ubuntu Touch (image 123, mako HW), with these steps:
  # install dependencies
  apt-get install automake libtool pkg-config libdbus-glib-1-dev libglib2.0-dev libpulse-dev
  # compile
  ./autogen.sh && ./configure && make && make install
  # copy d-bus policy to correct place
  cp tone-generator.conf /etc/dbus-1/system.d/
  # run pulseaudio in system mode, and tone-generator as user 'pulse'
  start pulseaudio
  su -c tonegend -s /bin/sh pulse
I can now issue the abovementioned D-Bus calls. Note, the default volume of the generated sounds is VERY LOUD.

Still evaluating tone-generator, some notes:
 - The volume of the DTMF sounds is set globally, via command line argument ' --volume-dtmf N' with N being 0 .. 100 percent of the maximum volume. The D-Bus interface's volume argument is ignored for DTMF sounds.
 - Two more command line arguments (buffer length; minimum recording length) need to be given to avoid a significant delay. "tonegend -b 100 -r 20 --volume-dtmf 30" seems to work well.
 - Haven't figured out yet why tonegend can't connect to PulseAudio if it's running in session mode, only in system mode (failing in pa_context_connect() in ausrv.c).

DTMF tones are played locally when running tone-generator (not packaged yet, source and README at https://github.com/marttipiirainen/tone-generator) and adding some D-Bus calls to telepathy-ofono )https://code.launchpad.net/~piiramar/telepathy-ofono/dtmf-local-playback ). This is only a "proof of concept" currently.

I added initial debian packaging to tone-generator, and moved the client-side code to telephony-service (instead of telepathy-ofono). Private branches:
  https://github.com/marttipiirainen/tone-generator
  https://code.launchpad.net/~piiramar/telephony-service/tone-generation

Closed out the dialer tasks as the fix involves creation of a new package ( tone-generator; in-progress ) and changes to telephony-service.

This bug was fixed in the package telephony-service - 0.1+14.10.20140813.1-0ubuntu1

---------------
telephony-service (0.1+14.10.20140813.1-0ubuntu1) utopic; urgency=low

  [ Ubuntu daily release ]
  * New rebuild forced

  [ Gustavo Pichorim Boiko ]
  * Check if the self contact actually exists before getting its
    presence. (LP: #1355388)
  * Do not update the .po files during `make`, update only the .pot
    file.

  [ Martti Piirainen ]
  * Adding support for tone generator (LP: #1187453). (LP: #1187453)

  [ Tiago Salem Herrmann ]
  * Use system settings to retrieve sim card display names.
  * Reduce vibration duration for text messages. Fix vibration in silent
    mode options for calls/messages (LP: #1347908)
 -- Ubuntu daily release <email address hidden> Wed, 13 Aug 2014 22:31:48 +0000

Works fine in mako HW, image 190.

@kevin that seems to be a different issue, see bug #1403600

agreed, resetting states