Public bug reported:

dbus-daemon is working all the time on ubuntu phone, using up to 100%
CPU. It seems that some services are emitting messages continuously,
particularly  Upstart and network indicator. The phone becomes unusable
and must be restarted to work

Disabling wifi reduces a lot the amount of messages

Phone : BQ Aquaris E4.5 Ubuntu Edition
DistroRelease: Ubuntu 15.04 (r25)
Uname: Linux ubuntu-phablet 3.4.67

extract from dbus--monitor --profile --session (lots of messages without
actually using the phone)

sig     1442761291      858477  83609   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761291      877536  83610   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761292      667180  83611   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761292      722328  1416    /com/canonical/indicator/power  
org.gtk.Actions Changed
sig     1442761292      760751  83612   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761292      764403  83613   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761292      768329  83614   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761295      884397  6118    /com/canonical/indicator/network        
org.gtk.Actions Changed
sig     1442761295      905577  83615   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761295      907594  83616   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761300      773941  1417    /com/canonical/indicator/power  
org.gtk.Actions Changed
sig     1442761300      781362  83617   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761300      782578  83618   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761306      862983  83619   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
sig     1442761306      882480  83620   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted


lots of messages are concerning access points
Extract from dbus--monitor  --session

signal sender=:1.58 -> dest=(null destination) serial=6139 
path=/com/canonical/indicator/network; interface=org.gtk.Actions; member=Changed
   array [
   ]
   array [
   ]
   array [
      dict entry(
         string "accesspoint.1259::strength"
         variant             byte 59
      )
   ]
   array [
   ]
signal sender=:1.0 -> dest=(null destination) serial=83772 
path=/com/ubuntu/Upstart; interface=com.ubuntu.Upstart0_6; member=EventEmitted
   string "dbus"
   array [
      string "SIGNAL=Changed"
      string "BUS=session"
      string "INTERFACE=org.gtk.Actions"
      string "OBJPATH=/com/canonical/indicator/network"
      string "SENDER=:1.58"
   ]
signal sender=:1.0 -> dest=(null destination) serial=83773 
path=/com/ubuntu/Upstart; interface=com.ubuntu.Upstart0_6; member=EventEmitted
   string "dbus"
   array [
      string "SIGNAL=PropertiesChanged"
      string "BUS=system"
      string "INTERFACE=org.freedesktop.NetworkManager.AccessPoint"
      string "OBJPATH=/org/freedesktop/NetworkManager/AccessPoint/2913"
      string "SENDER=:1.7"
   ]

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: dbus 1.8.12-1ubuntu5
Uname: Linux 3.4.67 armv7l
ApportVersion: 2.17.2-0ubuntu1.3
Architecture: armhf
CurrentDesktop: Unity
Date: Sun Sep 20 16:40:39 2015
InstallationDate: Installed on 2015-08-25 (25 days ago)
InstallationMedia: Ubuntu 15.04 - armhf (20150825-170536)
SourcePackage: dbus
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: dbus (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug armhf bq phone third-party-packages vivid

** Description changed:

  dbus-daemon is working all the time on ubuntu phone, using up to 100%
  CPU. It seems that some services are emitting messages continuously,
  particularly  Upstart and network indicator. The phone becomes unusable
  and must be restarted to work
  
  Disabling wifi reduces a lot the amount of messages
  
  Phone : BQ Aquaris E4.5 Ubuntu Edition
  DistroRelease: Ubuntu 15.04 (r25)
  Uname: Linux ubuntu-phablet 3.4.67
  
  extract from dbus--monitor --profile --session (lots of messages without
  actually using the phone)
- 
  
  sig   1442761291      858477  83609   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761291      877536  83610   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761292      667180  83611   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761292      722328  1416    /com/canonical/indicator/power  
org.gtk.Actions Changed
  sig   1442761292      760751  83612   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761292      764403  83613   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761292      768329  83614   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761295      884397  6118    /com/canonical/indicator/network        
org.gtk.Actions Changed
  sig   1442761295      905577  83615   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761295      907594  83616   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761300      773941  1417    /com/canonical/indicator/power  
org.gtk.Actions Changed
  sig   1442761300      781362  83617   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761300      782578  83618   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761306      862983  83619   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
  sig   1442761306      882480  83620   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
- sig   1442761307      856391  6119    /com/canonical/indicator/network        
org.gtk.Actions Changed
- sig   1442761307      873791  83621   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
- sig   1442761307      876919  83622   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
- sig   1442761312      666858  83623   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
- sig   1442761312      724728  83624   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
- sig   1442761313      879943  6120    /com/canonical/indicator/network        
org.gtk.Actions Changed
- sig   1442761313      899147  83625   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
- sig   1442761313      901701  83626   /com/ubuntu/Upstart     
com.ubuntu.Upstart0_6   EventEmitted
+ 
  
  lots of messages are concerning access points
  Extract from dbus--monitor  --session
  
  signal sender=:1.58 -> dest=(null destination) serial=6139 
path=/com/canonical/indicator/network; interface=org.gtk.Actions; member=Changed
-    array [
-    ]
-    array [
-    ]
-    array [
-       dict entry(
-          string "accesspoint.1259::strength"
-          variant             byte 59
-       )
-    ]
-    array [
-    ]
+    array [
+    ]
+    array [
+    ]
+    array [
+       dict entry(
+          string "accesspoint.1259::strength"
+          variant             byte 59
+       )
+    ]
+    array [
+    ]
  signal sender=:1.0 -> dest=(null destination) serial=83772 
path=/com/ubuntu/Upstart; interface=com.ubuntu.Upstart0_6; member=EventEmitted
-    string "dbus"
-    array [
-       string "SIGNAL=Changed"
-       string "BUS=session"
-       string "INTERFACE=org.gtk.Actions"
-       string "OBJPATH=/com/canonical/indicator/network"
-       string "SENDER=:1.58"
-    ]
+    string "dbus"
+    array [
+       string "SIGNAL=Changed"
+       string "BUS=session"
+       string "INTERFACE=org.gtk.Actions"
+       string "OBJPATH=/com/canonical/indicator/network"
+       string "SENDER=:1.58"
+    ]
  signal sender=:1.0 -> dest=(null destination) serial=83773 
path=/com/ubuntu/Upstart; interface=com.ubuntu.Upstart0_6; member=EventEmitted
-    string "dbus"
-    array [
-       string "SIGNAL=PropertiesChanged"
-       string "BUS=system"
-       string "INTERFACE=org.freedesktop.NetworkManager.AccessPoint"
-       string "OBJPATH=/org/freedesktop/NetworkManager/AccessPoint/2913"
-       string "SENDER=:1.7"
-    ]
+    string "dbus"
+    array [
+       string "SIGNAL=PropertiesChanged"
+       string "BUS=system"
+       string "INTERFACE=org.freedesktop.NetworkManager.AccessPoint"
+       string "OBJPATH=/org/freedesktop/NetworkManager/AccessPoint/2913"
+       string "SENDER=:1.7"
+    ]
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: dbus 1.8.12-1ubuntu5
  Uname: Linux 3.4.67 armv7l
  ApportVersion: 2.17.2-0ubuntu1.3
  Architecture: armhf
  CurrentDesktop: Unity
  Date: Sun Sep 20 16:40:39 2015
  InstallationDate: Installed on 2015-08-25 (25 days ago)
  InstallationMedia: Ubuntu 15.04 - armhf (20150825-170536)
  SourcePackage: dbus
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1497750

Title:
  dbus-daemon uses huge amount of CPU

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