Public bug reported:

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> 
About Ubuntu
Description:    Ubuntu Trusty Tahr (development branch)
Release:        14.04

2) The version of the package you are using, via 'apt-cache policy pkgname' or 
by checking in Software Center
nvidia-331:
  Installed: 331.38-0ubuntu3
  Candidate: 331.38-0ubuntu3
  Version table:
 *** 331.38-0ubuntu3 0
        500 http://mirror.bytemark.co.uk/ubuntu/ trusty/restricted amd64 
Packages
        100 /var/lib/dpkg/status

3) What you expected to happen
To be able to select Intel (Power Saving Mode) from the nvidia/intel list

4) What happened instead
Alert window appears with a traceback.
The same traceback is visible in the terminal:

iain-laptop ~ $ nvidia-settings 
** Message: PRIME: Laptop detected
** Message: PRIME: is it supported? yes

ERROR: Traceback (most recent call last):
       File "/usr/lib/python3/dist-packages/dbus/bus.py", line 175, in 
activate_name_owner
       return self.get_name_owner(bus_name)
       File "/usr/lib/python3/dist-packages/dbus/bus.py", line 361, in 
get_name_owner
       's', (bus_name,), **keywords)
       File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in 
call_blocking
       message, timeout)
       dbus.exceptions.DBusException: 
org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 
'com.ubuntu.ScreenResolution.Mechanism': no such name
       During handling of the above exception, another exception occurred:
       Traceback (most recent call last):
       File "/usr/share/screen-resolution-extra/nvidia-prime.py", line 55, in 
<module>
       conf = get_prime_service()
       File "/usr/share/screen-resolution-extra/nvidia-prime.py", line 34, in 
get_prime_service
       service_object = dbus.SystemBus().get_object(SERVICE_NAME, OBJECT_PATH)
       File "/usr/lib/python3/dist-packages/dbus/bus.py", line 241, in 
get_object
       follow_name_owner_changes=follow_name_owner_changes)
       File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 248, in 
__init__
       self._named_service = conn.activate_name_owner(bus_name)
       File "/usr/lib/python3/dist-packages/dbus/bus.py", line 180, in 
activate_name_owner
       self.start_service_by_name(bus_name)
       File "/usr/lib/python3/dist-packages/dbus/bus.py", line 278, in 
start_service_by_name
       'su', (bus_name, flags)))
       File "/usr/lib/python3/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

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: nvidia-331 331.38-0ubuntu3
ProcVersionSignature: Ubuntu 3.13.0-7.25-generic 3.13.1
Uname: Linux 3.13.0-7-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.13.2-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Feb  5 20:55:48 2014
InstallationDate: Installed on 2014-01-23 (13 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140123)
SourcePackage: nvidia-graphics-drivers-331
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: nvidia-graphics-drivers-331 (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug trusty

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-331 in Ubuntu.
https://bugs.launchpad.net/bugs/1276816

Title:
  Unable to select Intel in PRIME Profiles within nvidia-settings

Status in “nvidia-graphics-drivers-331” package in Ubuntu:
  Confirmed

Bug description:
  1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> 
About Ubuntu
  Description:  Ubuntu Trusty Tahr (development branch)
  Release:      14.04

  2) The version of the package you are using, via 'apt-cache policy pkgname' 
or by checking in Software Center
  nvidia-331:
    Installed: 331.38-0ubuntu3
    Candidate: 331.38-0ubuntu3
    Version table:
   *** 331.38-0ubuntu3 0
          500 http://mirror.bytemark.co.uk/ubuntu/ trusty/restricted amd64 
Packages
          100 /var/lib/dpkg/status

  3) What you expected to happen
  To be able to select Intel (Power Saving Mode) from the nvidia/intel list

  4) What happened instead
  Alert window appears with a traceback.
  The same traceback is visible in the terminal:

  iain-laptop ~ $ nvidia-settings 
  ** Message: PRIME: Laptop detected
  ** Message: PRIME: is it supported? yes

  ERROR: Traceback (most recent call last):
         File "/usr/lib/python3/dist-packages/dbus/bus.py", line 175, in 
activate_name_owner
         return self.get_name_owner(bus_name)
         File "/usr/lib/python3/dist-packages/dbus/bus.py", line 361, in 
get_name_owner
         's', (bus_name,), **keywords)
         File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in 
call_blocking
         message, timeout)
         dbus.exceptions.DBusException: 
org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 
'com.ubuntu.ScreenResolution.Mechanism': no such name
         During handling of the above exception, another exception occurred:
         Traceback (most recent call last):
         File "/usr/share/screen-resolution-extra/nvidia-prime.py", line 55, in 
<module>
         conf = get_prime_service()
         File "/usr/share/screen-resolution-extra/nvidia-prime.py", line 34, in 
get_prime_service
         service_object = dbus.SystemBus().get_object(SERVICE_NAME, OBJECT_PATH)
         File "/usr/lib/python3/dist-packages/dbus/bus.py", line 241, in 
get_object
         follow_name_owner_changes=follow_name_owner_changes)
         File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 248, in 
__init__
         self._named_service = conn.activate_name_owner(bus_name)
         File "/usr/lib/python3/dist-packages/dbus/bus.py", line 180, in 
activate_name_owner
         self.start_service_by_name(bus_name)
         File "/usr/lib/python3/dist-packages/dbus/bus.py", line 278, in 
start_service_by_name
         'su', (bus_name, flags)))
         File "/usr/lib/python3/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

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: nvidia-331 331.38-0ubuntu3
  ProcVersionSignature: Ubuntu 3.13.0-7.25-generic 3.13.1
  Uname: Linux 3.13.0-7-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Feb  5 20:55:48 2014
  InstallationDate: Installed on 2014-01-23 (13 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140123)
  SourcePackage: nvidia-graphics-drivers-331
  UpgradeStatus: No upgrade log present (probably fresh install)

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