Dbus trace from test machine:
signal sender=:1.147 -> dest=(null destination) serial=47 path=/org/ayatana/indicator/sound/service; interface=org.ayatana.indicator.sound; member=SinkMuteUpdate boolean true signal sender=:1.147 -> dest=(null destination) serial=48 path=/org/ayatana/indicator/sound/menu; interface=org.ayatana.dbusmenu; member=ItemPropertyUpdated int32 2 string "label" variant string "Unmute" method return sender=:1.147 -> dest=:1.148 reply_serial=35 method call sender=:1.148 -> dest=:1.147 serial=36 path=/org/ayatana/indicator/sound/menu; interface=org.ayatana.dbusmenu; member=Event int32 2 string "clicked" variant int32 0 uint32 27944840 signal sender=:1.147 -> dest=(null destination) serial=50 path=/org/ayatana/indicator/sound/service; interface=org.ayatana.indicator.sound; member=SinkVolumeUpdate double 52.0538 signal sender=:1.147 -> dest=(null destination) serial=51 path=/org/ayatana/indicator/sound/menu; interface=org.ayatana.dbusmenu; member=ItemPropertyUpdated int32 2 string "label" variant string "Mute All" method return sender=:1.147 -> dest=:1.148 reply_serial=36
Dbus trace from test machine:
signal sender=:1.147 -> dest=(null destination) serial=47 path=/org/ ayatana/ indicator/ sound/service; interface= org.ayatana. indicator. sound; member= SinkMuteUpdate ayatana/ indicator/ sound/menu; interface= org.ayatana. dbusmenu; member= ItemPropertyUpd ated ayatana/ indicator/ sound/menu; interface= org.ayatana. dbusmenu; member=Event ayatana/ indicator/ sound/service; interface= org.ayatana. indicator. sound; member= SinkVolumeUpdat e ayatana/ indicator/ sound/menu; interface= org.ayatana. dbusmenu; member= ItemPropertyUpd ated
boolean true
signal sender=:1.147 -> dest=(null destination) serial=48 path=/org/
int32 2
string "label"
variant string "Unmute"
method return sender=:1.147 -> dest=:1.148 reply_serial=35
method call sender=:1.148 -> dest=:1.147 serial=36 path=/org/
int32 2
string "clicked"
variant int32 0
uint32 27944840
signal sender=:1.147 -> dest=(null destination) serial=50 path=/org/
double 52.0538
signal sender=:1.147 -> dest=(null destination) serial=51 path=/org/
int32 2
string "label"
variant string "Mute All"
method return sender=:1.147 -> dest=:1.148 reply_serial=36