Public bug reported:

Just a few days ago I did a fresh install of Ubuntu 12.04.
At first it worked, but now I can't install or remove any program through 
Ubuntu Software Center. I just click "install" or "remove" button , or even 
"use this source", and nothing happens. 

I will try to describe some symptoms so you can help me.


1) Everytime I click "install" or "remove" in USC, I get this messages in 
syslog:
May 21 11:54:54 ******* dbus[848]: [system] Activating service 
name='org.debian.apt' (using servicehelper)
May 21 11:54:54 ******* dbus[848]: [system] Activated service 'org.debian.apt' 
failed: Launch helper exited with unknown return code 1

2) Apt-get works flawlessly, except that now it started to throw me that 
message everytime after I install something:
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper 
exited with unknown return code 1
It just throws it, but the installation happens.

3) Running gksudo software-center and trying to install something gives me this 
in terminal:
2012-05-21 11:58:09,577 - softwarecenter.db.database - INFO - open() database: 
path=None use_axi=True use_agent=True
2012-05-21 11:58:09,995 - softwarecenter.backend.reviews - WARNING - Could not 
get usefulness from server, no username in config file
2012-05-21 11:58:10,214 - softwarecenter.db.pkginfo_impl.aptcache - INFO - 
aptcache.open()
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 607, in 
msg_reply_handler
    *message.get_args_list()))
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 69, in error_cb
    callback('')
  File 
"/usr/share/software-center/softwarecenter/backend/installbackend_impl/aptd.py",
 line 151, in _register_active_transactions_watch
    apt_daemon = client.get_aptdaemon(bus=bus)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 1694, in 
get_aptdaemon
    False),
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 241, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 248, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 180, in 
activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 278, in 
start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in 
call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: 
Launch helper exited with unknown return code 1
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 607, in 
msg_reply_handler
    *message.get_args_list()))
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 69, in error_cb
    callback('')
  File 
"/usr/share/software-center/softwarecenter/backend/installbackend_impl/aptd.py",
 line 151, in _register_active_transactions_watch
    apt_daemon = client.get_aptdaemon(bus=bus)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 1694, in 
get_aptdaemon
    False),
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 241, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 248, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 180, in 
activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 278, in 
start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in 
call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: 
Launch helper exited with unknown return code 1
2012-05-21 11:58:13,921 - softwarecenter.ui.gtk3.widgets.exhibits - WARNING - 
download failed: '<class 'gi._glib.GError'>', 'Operation not supported'
2012-05-21 11:58:45,814 - softwarecenter.ui.gtk3.app - INFO - 
software-center-agent finished with status 0
2012-05-21 11:58:45,814 - softwarecenter.db.database - INFO - reopen() database
2012-05-21 11:58:45,815 - softwarecenter.db.database - INFO - open() database: 
path=None use_axi=True use_agent=True
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 475, in 
_inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 1620, in 
_run_transaction_helper
    daemon = get_aptdaemon(self.bus)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 1694, in 
get_aptdaemon
    False),
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 241, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 248, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 180, in 
activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 278, in 
start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in 
call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: 
Launch helper exited with unknown return code 1
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 475, in 
_inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 1620, in 
_run_transaction_helper
    daemon = get_aptdaemon(self.bus)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 1694, in 
get_aptdaemon
    False),
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 241, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 248, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 180, in 
activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 278, in 
start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in 
call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: 
Launch helper exited with unknown return code 1
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: 
Launch helper exited with unknown return code 1
2012-05-21 11:59:56,355 - softwarecenter.backend - WARNING - _on_trans_error: 
org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper exited with unknown 
return code 1
2012-05-21 11:59:59,544 - softwarecenter.ui.gtk3.widgets.exhibits - WARNING - 
download failed: '<class 'gi._glib.GError'>', 'Operation not supported'

4) I believe it is something Python related, since I am also experiencing some 
weird issues using python-pip package.
Actually, entering "ubuntu-bug software-center" gives me:
ERROR: Could not import module, is a package upgrade in progress? Error: No 
module named pkg_resources

-- Which is very similar to "pip" (from python-pip package) output:
Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
ImportError: No module named pkg_resources
--------------------------------------------------------------------------------------


So, what I've tried to solve it? Until now, I've tried this commands:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install --reinstall software-center
sudo apt-get purge software-center; sudo apt-get install software-center
sudo apt-get install --reinstall apt
rm -r ~/.cache/software-center
sudo apt-get install ubuntu-desktop
gksudo software-center
sudo apt-get purge python-pip; sudo apt-get install python-pip
sudo apt-get purge python-setuptools; sudo apt-get install python-setuptools
I also did an apt-get install --reinstall for all dependencies of 
software-center.

But the problem goes on. =/

At last, I send you the output for the commands on 
https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure below.
I appreciate your help. :)

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"
Linux ********** 3.2.0-24-generic-pae #37-Ubuntu SMP Wed Apr 25 10:47:59 UTC 
2012 i686 i686 i386 GNU/Linux
rm: cannot remove `/var/lib/apt/lists/lock': No such file or directory
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  indicator-status-provider-emesene* python-dnspython* python-farstream*
  python-webkit* python-xmpp*
0 upgraded, 0 newly installed, 5 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 5487 kB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 195858 files and directories currently installed.)
Removing indicator-status-provider-emesene ...
Removing python-dnspython ...
Removing python-farstream ...
Removing python-webkit ...
Removing python-xmpp ...
Setting up software-center (5.2.1) ...
Updating software catalog...this may take a moment.
INFO:softwarecenter.db.pkginfo_impl.aptcache:aptcache.open()
Software catalog update was successful.
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper 
exited with unknown return code 1
Ign http://archive.ubuntu.com precise InRelease
Ign http://archive.ubuntu.com precise-updates InRelease
Ign http://archive.ubuntu.com precise-backports InRelease
Ign http://archive.canonical.com precise InRelease                   
Ign http://extras.ubuntu.com precise InRelease                       
Ign http://archive.ubuntu.com precise-security InRelease
Get:1 http://archive.ubuntu.com precise Release.gpg [198 B]
Get:2 http://archive.ubuntu.com precise-updates Release.gpg [198 B]            
Get:3 http://archive.canonical.com precise Release.gpg [198 B]                 
Get:4 http://extras.ubuntu.com precise Release.gpg [72 B]                      
Get:5 http://archive.ubuntu.com precise-backports Release.gpg [198 B]         
Get:6 http://archive.canonical.com precise Release [7078 B]                    
Get:7 http://extras.ubuntu.com precise Release [11.9 kB]                     
Get:8 http://archive.ubuntu.com precise-security Release.gpg [198 B]           
Get:9 http://archive.ubuntu.com precise Release [49.6 kB]                      
Get:10 http://archive.canonical.com precise/partner i386 Packages [4999 B]     
Get:11 http://extras.ubuntu.com precise/main Sources [476 B]                   
Ign http://archive.canonical.com precise/partner TranslationIndex              
Get:12 http://archive.ubuntu.com precise-updates Release [49.6 kB]             
Get:13 http://extras.ubuntu.com precise/main i386 Packages [555 B]             
Ign http://extras.ubuntu.com precise/main TranslationIndex                     
Get:14 http://archive.ubuntu.com precise-backports Release [49.6 kB]           
Get:15 http://archive.ubuntu.com precise-security Release [49.6 kB]            
Get:16 http://archive.ubuntu.com precise/main Sources [934 kB]                 
Ign http://archive.canonical.com precise/partner Translation-en                
Ign http://extras.ubuntu.com precise/main Translation-en                     
Get:17 http://archive.ubuntu.com precise/restricted Sources [5470 B]
Get:18 http://archive.ubuntu.com precise/universe Sources [5019 kB]
Get:19 http://archive.ubuntu.com precise/multiverse Sources [155 kB]           
Get:20 http://archive.ubuntu.com precise/main i386 Packages [1274 kB]          
Get:21 http://archive.ubuntu.com precise/restricted i386 Packages [8431 B]     
Get:22 http://archive.ubuntu.com precise/universe i386 Packages [4796 kB]      
Get:23 http://archive.ubuntu.com precise/multiverse i386 Packages [121 kB]     
Get:24 http://archive.ubuntu.com precise/main TranslationIndex [3706 B]        
Get:25 http://archive.ubuntu.com precise/multiverse TranslationIndex [2676 B]  
Get:26 http://archive.ubuntu.com precise/restricted TranslationIndex [2596 B]  
Get:27 http://archive.ubuntu.com precise/universe TranslationIndex [2922 B]    
Get:28 http://archive.ubuntu.com precise-updates/main Sources [41.7 kB]        
Get:29 http://archive.ubuntu.com precise-updates/restricted Sources [1379 B]   
Get:30 http://archive.ubuntu.com precise-updates/universe Sources [12.3 kB]    
Get:31 http://archive.ubuntu.com precise-updates/multiverse Sources [696 B]    
Get:32 http://archive.ubuntu.com precise-updates/main i386 Packages [112 kB]   
Get:33 http://archive.ubuntu.com precise-updates/restricted i386 Packages [2439 
B]
Get:34 http://archive.ubuntu.com precise-updates/universe i386 Packages [34.4 
kB]
Get:35 http://archive.ubuntu.com precise-updates/multiverse i386 Packages [1393 
B]
Get:36 http://archive.ubuntu.com precise-updates/main TranslationIndex [73 B]  
Get:37 http://archive.ubuntu.com precise-updates/multiverse TranslationIndex 
[71 B]
Get:38 http://archive.ubuntu.com precise-updates/restricted TranslationIndex 
[71 B]
Get:39 http://archive.ubuntu.com precise-updates/universe TranslationIndex [73 
B]
Get:40 http://archive.ubuntu.com precise-backports/main Sources [700 B]        
Get:41 http://archive.ubuntu.com precise-backports/restricted Sources [14 B]   
Get:42 http://archive.ubuntu.com precise-backports/universe Sources [2696 B]   
Get:43 http://archive.ubuntu.com precise-backports/multiverse Sources [14 B]   
Get:44 http://archive.ubuntu.com precise-backports/main i386 Packages [559 B]  
Get:45 http://archive.ubuntu.com precise-backports/restricted i386 Packages [14 
B]
Get:46 http://archive.ubuntu.com precise-backports/universe i386 Packages [2379 
B]
Get:47 http://archive.ubuntu.com precise-backports/multiverse i386 Packages [14 
B]
Get:48 http://archive.ubuntu.com precise-backports/main TranslationIndex [71 B]
Get:49 http://archive.ubuntu.com precise-backports/multiverse TranslationIndex 
[70 B]
Get:50 http://archive.ubuntu.com precise-backports/restricted TranslationIndex 
[70 B]
Get:51 http://archive.ubuntu.com precise-backports/universe TranslationIndex 
[72 B]
Get:52 http://archive.ubuntu.com precise-security/main Sources [9937 B]        
Get:53 http://archive.ubuntu.com precise-security/restricted Sources [14 B]    
Get:54 http://archive.ubuntu.com precise-security/universe Sources [4063 B]    
Get:55 http://archive.ubuntu.com precise-security/multiverse Sources [696 B]   
Get:56 http://archive.ubuntu.com precise-security/main i386 Packages [37.1 kB] 
Get:57 http://archive.ubuntu.com precise-security/restricted i386 Packages [14 
B]
Get:58 http://archive.ubuntu.com precise-security/universe i386 Packages [9409 
B]
Get:59 http://archive.ubuntu.com precise-security/multiverse i386 Packages 
[1393 B]
Get:60 http://archive.ubuntu.com precise-security/main TranslationIndex [73 B] 
Get:61 http://archive.ubuntu.com precise-security/multiverse TranslationIndex 
[71 B]
Get:62 http://archive.ubuntu.com precise-security/restricted TranslationIndex 
[70 B]
Get:63 http://archive.ubuntu.com precise-security/universe TranslationIndex [72 
B]
Get:64 http://archive.ubuntu.com precise/main Translation-en [726 kB]          
Get:65 http://archive.ubuntu.com precise/multiverse Translation-en [93.4 kB]   
Get:66 http://archive.ubuntu.com precise/restricted Translation-en [2395 B]    
Get:67 http://archive.ubuntu.com precise/universe Translation-en [3341 kB]     
Get:68 http://archive.ubuntu.com precise-updates/main Translation-en [53.7 kB] 
Get:69 http://archive.ubuntu.com precise-updates/multiverse Translation-en [587 
B]
Get:70 http://archive.ubuntu.com precise-updates/restricted Translation-en [798 
B]
Get:71 http://archive.ubuntu.com precise-updates/universe Translation-en [21.4 
kB]
Get:72 http://archive.ubuntu.com precise-backports/main Translation-en [308 B] 
Get:73 http://archive.ubuntu.com precise-backports/multiverse Translation-en 
[14 B]
Get:74 http://archive.ubuntu.com precise-backports/restricted Translation-en 
[14 B]
Get:75 http://archive.ubuntu.com precise-backports/universe Translation-en 
[1477 B]
Get:76 http://archive.ubuntu.com precise-security/main Translation-en [16.9 kB]
Get:77 http://archive.ubuntu.com precise-security/multiverse Translation-en 
[587 B]
Get:78 http://archive.ubuntu.com precise-security/restricted Translation-en [14 
B]
Get:79 http://archive.ubuntu.com precise-security/universe Translation-en [7053 
B]
Fetched 17.1 MB in 30s (557 kB/s)                                              
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper 
exited with unknown return code 1
Reading package lists... Done
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
Ign http://archive.canonical.com precise InRelease
Ign http://extras.ubuntu.com precise InRelease
Ign http://archive.ubuntu.com precise InRelease
Ign http://archive.ubuntu.com precise-updates InRelease
Ign http://archive.ubuntu.com precise-backports InRelease            
Ign http://archive.ubuntu.com precise-security InRelease             
Hit http://archive.canonical.com precise Release.gpg                 
Hit http://extras.ubuntu.com precise Release.gpg
Hit http://archive.ubuntu.com precise Release.gpg
Hit http://archive.canonical.com precise Release                     
Hit http://extras.ubuntu.com precise Release                         
Hit http://archive.ubuntu.com precise-updates Release.gpg             
Hit http://archive.ubuntu.com precise-backports Release.gpg
Hit http://archive.canonical.com precise/partner i386 Packages       
Hit http://extras.ubuntu.com precise/main Sources                    
Hit http://archive.ubuntu.com precise-security Release.gpg
Ign http://archive.canonical.com precise/partner TranslationIndex    
Hit http://extras.ubuntu.com precise/main i386 Packages              
Ign http://extras.ubuntu.com precise/main TranslationIndex           
Hit http://archive.ubuntu.com precise Release                        
Hit http://archive.ubuntu.com precise-updates Release                
Hit http://archive.ubuntu.com precise-backports Release                        
Hit http://archive.ubuntu.com precise-security Release                         
Hit http://archive.ubuntu.com precise/main Sources                             
Hit http://archive.ubuntu.com precise/restricted Sources             
Hit http://archive.ubuntu.com precise/universe Sources               
Hit http://archive.ubuntu.com precise/multiverse Sources             
Hit http://archive.ubuntu.com precise/main i386 Packages             
Hit http://archive.ubuntu.com precise/restricted i386 Packages       
Hit http://archive.ubuntu.com precise/universe i386 Packages         
Hit http://archive.ubuntu.com precise/multiverse i386 Packages       
Hit http://archive.ubuntu.com precise/main TranslationIndex          
Hit http://archive.ubuntu.com precise/multiverse TranslationIndex    
Hit http://archive.ubuntu.com precise/restricted TranslationIndex    
Hit http://archive.ubuntu.com precise/universe TranslationIndex      
Hit http://archive.ubuntu.com precise-updates/main Sources           
Hit http://archive.ubuntu.com precise-updates/restricted Sources     
Hit http://archive.ubuntu.com precise-updates/universe Sources       
Ign http://archive.canonical.com precise/partner Translation-en      
Hit http://archive.ubuntu.com precise-updates/multiverse Sources     
Hit http://archive.ubuntu.com precise-updates/main i386 Packages
Hit http://archive.ubuntu.com precise-updates/restricted i386 Packages
Hit http://archive.ubuntu.com precise-updates/universe i386 Packages
Hit http://archive.ubuntu.com precise-updates/multiverse i386 Packages
Ign http://extras.ubuntu.com precise/main Translation-en
Hit http://archive.ubuntu.com precise-updates/main TranslationIndex
Hit http://archive.ubuntu.com precise-updates/multiverse TranslationIndex
Hit http://archive.ubuntu.com precise-updates/restricted TranslationIndex
Hit http://archive.ubuntu.com precise-updates/universe TranslationIndex
Hit http://archive.ubuntu.com precise-backports/main Sources
Hit http://archive.ubuntu.com precise-backports/restricted Sources
Hit http://archive.ubuntu.com precise-backports/universe Sources
Hit http://archive.ubuntu.com precise-backports/multiverse Sources
Hit http://archive.ubuntu.com precise-backports/main i386 Packages
Hit http://archive.ubuntu.com precise-backports/restricted i386 Packages
Hit http://archive.ubuntu.com precise-backports/universe i386 Packages
Hit http://archive.ubuntu.com precise-backports/multiverse i386 Packages
Hit http://archive.ubuntu.com precise-backports/main TranslationIndex
Hit http://archive.ubuntu.com precise-backports/multiverse TranslationIndex
Hit http://archive.ubuntu.com precise-backports/restricted TranslationIndex
Hit http://archive.ubuntu.com precise-backports/universe TranslationIndex
Hit http://archive.ubuntu.com precise-security/main Sources
Hit http://archive.ubuntu.com precise-security/restricted Sources
Hit http://archive.ubuntu.com precise-security/universe Sources
Hit http://archive.ubuntu.com precise-security/multiverse Sources
Hit http://archive.ubuntu.com precise-security/main i386 Packages
Hit http://archive.ubuntu.com precise-security/restricted i386 Packages
Hit http://archive.ubuntu.com precise-security/universe i386 Packages
Hit http://archive.ubuntu.com precise-security/multiverse i386 Packages
Hit http://archive.ubuntu.com precise-security/main TranslationIndex
Hit http://archive.ubuntu.com precise-security/multiverse TranslationIndex
Hit http://archive.ubuntu.com precise-security/restricted TranslationIndex
Hit http://archive.ubuntu.com precise-security/universe TranslationIndex
Hit http://archive.ubuntu.com precise/main Translation-en
Hit http://archive.ubuntu.com precise/multiverse Translation-en
Hit http://archive.ubuntu.com precise/restricted Translation-en
Hit http://archive.ubuntu.com precise/universe Translation-en
Hit http://archive.ubuntu.com precise-updates/main Translation-en
Hit http://archive.ubuntu.com precise-updates/multiverse Translation-en
Hit http://archive.ubuntu.com precise-updates/restricted Translation-en
Hit http://archive.ubuntu.com precise-updates/universe Translation-en
Hit http://archive.ubuntu.com precise-backports/main Translation-en
Hit http://archive.ubuntu.com precise-backports/multiverse Translation-en
Hit http://archive.ubuntu.com precise-backports/restricted Translation-en
Hit http://archive.ubuntu.com precise-backports/universe Translation-en
Hit http://archive.ubuntu.com precise-security/main Translation-en
Hit http://archive.ubuntu.com precise-security/multiverse Translation-en
Hit http://archive.ubuntu.com precise-security/restricted Translation-en
Hit http://archive.ubuntu.com precise-security/universe Translation-en
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper 
exited with unknown return code 1
Reading package lists... Done
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  linux-headers-3.2.0-24 linux-headers-3.2.0-24-generic-pae
  linux-image-3.2.0-24-generic-pae linux-libc-dev
4 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 51.5 MB of archives.
After this operation, 114 kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Get:1 http://archive.ubuntu.com/ubuntu/ precise-security/main 
linux-image-3.2.0-24-generic-pae i386 3.2.0-24.38 [38.1 MB]
Get:2 http://archive.ubuntu.com/ubuntu/ precise-security/main 
linux-headers-3.2.0-24 all 3.2.0-24.38 [11.7 MB]
Get:3 http://archive.ubuntu.com/ubuntu/ precise-security/main 
linux-headers-3.2.0-24-generic-pae i386 3.2.0-24.38 [955 kB]
Get:4 http://archive.ubuntu.com/ubuntu/ precise-security/main linux-libc-dev 
i386 3.2.0-24.38 [854 kB]
Fetched 51.5 MB in 1min 17s (663 kB/s)                                         
(Reading database ... 195473 files and directories currently installed.)
Preparing to replace linux-image-3.2.0-24-generic-pae 3.2.0-24.37 (using 
.../linux-image-3.2.0-24-generic-pae_3.2.0-24.38_i386.deb) ...
Done.
Unpacking replacement linux-image-3.2.0-24-generic-pae ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.2.0-24-generic-pae 
/boot/vmlinuz-3.2.0-24-generic-pae
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.2.0-24-generic-pae 
/boot/vmlinuz-3.2.0-24-generic-pae
Preparing to replace linux-headers-3.2.0-24 3.2.0-24.37 (using 
.../linux-headers-3.2.0-24_3.2.0-24.38_all.deb) ...
Unpacking replacement linux-headers-3.2.0-24 ...
Preparing to replace linux-headers-3.2.0-24-generic-pae 3.2.0-24.37 (using 
.../linux-headers-3.2.0-24-generic-pae_3.2.0-24.38_i386.deb) ...
Unpacking replacement linux-headers-3.2.0-24-generic-pae ...
Preparing to replace linux-libc-dev 3.2.0-24.37 (using 
.../linux-libc-dev_3.2.0-24.38_i386.deb) ...
Unpacking replacement linux-libc-dev ...
Setting up linux-image-3.2.0-24-generic-pae (3.2.0-24.38) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/dkms 3.2.0-24-generic-pae 
/boot/vmlinuz-3.2.0-24-generic-pae
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 
3.2.0-24-generic-pae /boot/vmlinuz-3.2.0-24-generic-pae
update-initramfs: Generating /boot/initrd.img-3.2.0-24-generic-pae
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.2.0-24-generic-pae 
/boot/vmlinuz-3.2.0-24-generic-pae
run-parts: executing /etc/kernel/postinst.d/update-notifier 
3.2.0-24-generic-pae /boot/vmlinuz-3.2.0-24-generic-pae
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.2.0-24-generic-pae 
/boot/vmlinuz-3.2.0-24-generic-pae
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.2.0-24-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-24-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-23-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-23-generic-pae
Found memtest86+ image: /boot/memtest86+.bin
Found Windows Recovery Environment (loader) on /dev/sda1
Found Windows 7 (loader) on /dev/sda2
done
Setting up linux-headers-3.2.0-24 (3.2.0-24.38) ...
Setting up linux-headers-3.2.0-24-generic-pae (3.2.0-24.38) ...
Examining /etc/kernel/header_postinst.d.
run-parts: executing /etc/kernel/header_postinst.d/dkms 3.2.0-24-generic-pae 
/boot/vmlinuz-3.2.0-24-generic-pae
Setting up linux-libc-dev (3.2.0-24.38) ...
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper 
exited with unknown return code 1

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

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https://bugs.launchpad.net/bugs/1002981

Title:
  Software Center won't install or remove any package

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