I can't select Intel (power saving mode)

Can you still reproduce the problem?

Yes, i can. Tell me about the informations that i must collect about the problem and in maximum 24 hours i give you a response.

I don't know if this is relevant but i try nvidia-prime 5.0 with Ubuntu 12.04 LTS and Linux kernel 3.8 and i have the same resoults.

Please attach the output of the following command:
lspci -n

and the following files:
/var/log/prime-supported.log
/var/log/prime-offload.log
/var/log/nvidia-prime-upstart.log
/var/log/prime-switch.log
/var/log/prime-supported.log

If attaching the files is a problem, you can install the pastebinit package ("sudo apt-get install pastebinit"), type "pastebinit name_of_the_file_to_attach" and post here the link that the command returns.

I did a fresh install of Ubuntu 14.04 LTS and Unity and Compiz works with the nvidia graphics card but now i can't select the Intel graphic card. For not open a new bug i have modified this.

Please attach the files that I requested (even though the problem seems different to you).

I have attached the files that you asked my. If you need more information contact me.

Can't select Intel:

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

lspci -n
00:00.0 0600: 8086:0104 (rev 09)
00:01.0 0604: 8086:0101 (rev 09)
00:02.0 0300: 8086:0116 (rev 09)
00:16.0 0780: 8086:1c3a (rev 04)
00:1a.0 0c03: 8086:1c2d (rev 04)
00:1b.0 0403: 8086:1c20 (rev 04)
00:1c.0 0604: 8086:1c10 (rev b4)
00:1c.1 0604: 8086:1c12 (rev b4)
00:1c.3 0604: 8086:1c16 (rev b4)
00:1c.4 0604: 8086:1c18 (rev b4)
00:1c.7 0604: 8086:1c1e (rev b4)
00:1d.0 0c03: 8086:1c26 (rev 04)
00:1f.0 0601: 8086:1c4b (rev 04)
00:1f.2 0106: 8086:1c03 (rev 04)
00:1f.3 0c05: 8086:1c22 (rev 04)
01:00.0 0300: 10de:0df5 (rev a1)
01:00.1 0403: 10de:0bea (rev a1)
05:00.0 0200: 10ec:8136 (rev 05)
09:00.0 0280: 8086:008a (rev 34)
0b:00.0 0c03: 1033:0194 (rev 04)

/var/log/prime-supported.log:
Laptop detected

/var/log/prime-offload.log:
1

/var/log/nvidia-prime-upstart.log:
No bbswitch can be found 1st attempt
Configuring xorg.conf
Configuring alternatives
Info: the nvidia profile is already in use

/var/log/prime-switch.log:
1

This bug was fixed in the package screen-resolution-extra - 0.17.1

---------------
screen-resolution-extra (0.17.1) trusty; urgency=low

  * screenresolution-mechanism:
    - Make sure that the mechanism uses python 3 (LP: #1274733).
    - Replace gobject with the gir libraries.
 -- Alberto Milone <email address hidden> Tue, 18 Feb 2014 13:08:10 +0100

Good Job! it works! But now i did a fresh install and I have the same situation of some weeks ago. Unity not works. I have open a new bug there with all information that you asked me at that time https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331-updates/+bug/1281759

PS: I know I'm getting annoying for you! I'm Sorry!

I can confirm screen-resolution-extra 0.17.1 fixes the issue and that I'm now able to switch back to the Intel GPU. There is still some issue with nvidia wake from suspend that crashes X but this is reported as Bug 1220865.