Hi, I'm seeing the same thing on a fresh install of xubuntu 14.04. Once
it was installed I did the "search for restricted drivers" thing and
picked the top nvidia choice on the list: 331.38-0ubuntu7

In nvidia-settings if I try to switch away from Intel I get an empty pop
up with just a no-entry road sign graphic and [Ok] button.

from the command line is:
"""
** Message: PRIME: Requires offloading
** Message: PRIME: is it supported? yes
"""

when nvidia-settings starts, and
"""
ERROR: 
"""

when I try to click on NVIDIA (Performance Mode) when it asks which GPU
I'd like to use.

Interestingly, `nvidia-detector` returns "none".

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen 
Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation G94 [GeForce 9600 GT] 
(rev a1)

my setup is 3 monitors, two being driven by the Intel on chip-HD, and
the third being driven by the GeForce. I never did get the third monitor
working with 12.04, but it is dual-boot with Windows7 and in Windows it
all three work fine.

A month or two back I booted the same system with a either a 14.04 beta1
or Mint live USB stick and all three monitors came to life in linux for
the first time, so I'm quite hopeful that the new linux kernel is
capable of good things.

I never installed bumblebee, and 'dpkg -l' shows it listed as ^"un".
Would reminants of it have been pulled in during install so it would
need a --purge anyway?

`lsmod` shows that the 'nvidia' kernel module is loaded.

some of dmesg:
   11.293526] nvidia: module license 'NVIDIA' taints kernel.
[   11.293528] Disabling lock debugging due to kernel taint
[   11.293601] mei_me 0000:00:16.0: irq 47 for MSI/MSI-X
[   11.296345] nvidia: module verification failed: signature and/or  required 
key missing - tainting kernel
[   11.299871] nvidia 0000:01:00.0: enabling device (0000 -> 0003)
[   11.299944] vgaarb: device changed decodes: 
PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=none
[   11.300129] [drm] Initialized nvidia-drm 0.0.0 20130102 for 0000:01:00.0 on 
minor 0
[   11.300135] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  
8 19:32:30 PST 2014
[   11.300823] [drm] Memory usable by graphics device = 2048M
[   11.306653] WARNING! power/level is deprecated; use power/control instead
[   11.350366] i915 0000:00:02.0: irq 48 for MSI/MSI-X
[   11.350373] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   11.350374] [drm] Driver supports precise vblank timestamp query.
[   11.374521] [drm] Wrong MCH_SSKPD value: 0x20100406
[   11.374521] [drm] This can cause pipe underruns and display issues.
[   11.374521] [drm] Please upgrade your BIOS to fix this.
[   11.495669] fbcon: inteldrmfb (fb0) is primary device
...
[   11.825261] Console: switching to colour frame buffer device 210x65
[   11.827757] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[   11.827758] i915 0000:00:02.0: registered panic notifier
[   11.830828] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
[   11.831006] acpi device:58: registered as cooling_device14
[   11.831047] input: Video Bus as 
/devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input7
[   11.831198] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 1
[   11.831327] ACPI Warning: 0x0000000000000428-0x000000000000042f SystemIO 
conflicts with Region \PMIO 1 (20131115/utaddress-251)
[   11.831332] ACPI: If an ACPI driver is available for this device, you should 
use it instead of the native driver
[   11.831335] ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO 
conflicts with Region \GPIO 1 (20131115/utaddress-251)
[   11.831338] ACPI: If an ACPI driver is available for this device, you should 
use it instead of the native driver
[   11.831339] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO 
conflicts with Region \LED_ 1 (20131115/utaddress-251)
[   11.831340] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO 
conflicts with Region \GPIO 2 (20131115/utaddress-251)
[   11.831342] ACPI: If an ACPI driver is available for this device, you should 
use it instead of the native driver
[   11.831343] lpc_ich: Resource conflict(s) found affecting gpio_ich
...
[   15.322637] bbswitch: Found integrated VGA device 0000:00:02.0: 
\_SB_.PCI0.GFX0
[   15.322642] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0
[   15.322652] bbswitch: No discrete VGA device found
...
[   25.329742] init: Failed to spawn nvidia-persistenced main process: unable 
to execute: No such file or directory
...
[  726.739568] bbswitch: version 0.7
[  726.739575] bbswitch: Found integrated VGA device 0000:00:02.0: 
\_SB_.PCI0.GFX0
[  726.739578] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0
[  726.739580] bbswitch: No discrete VGA device found
[  736.749874] init: Failed to spawn nvidia-persistenced main process: unable 
to execute: No such file or directory


hmmm,

$ dpkg -l | grep bbswitch
ii  bbswitch-dkms                               0.7-2ubuntu1                    
      amd64        Interface for toggling the power on nVidia Optimus video 
cards


a copy of gpu-manager.log to follow.


thanks,
Hamish

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-prime in Ubuntu.
https://bugs.launchpad.net/bugs/1310023

Title:
  14.04: Nvidia Prime is unable to switch to the Nvidia card

Status in “nvidia-prime” package in Ubuntu:
  Incomplete

Bug description:
  I did a fresh install of 14.04 the day it was released. I use a XPS 15z 
laptop form Dell with hybrid graphics (Intel HD 3000 (probably) and Nvidia 
Geforce GT 525M). Booting doesn't work out of the box, but by setting
  GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor dell_laptop.backlight=0 
quiet splash"
  in /etc/default/grub it works. acpi=off when installing, removed that from 
the grub file when installed.

  I expected that the Prime feature introduced in kernel 3.12 (kernel
  3.13.x here) would let me switch between the Intel and Nvidia cards as
  i like, instead of using Bumblebee, which doesn't work properly with
  everything. I've installed and tried both the nvidia-331 and
  nvidia-304 drivers. Exactly the same result from both.

  Attempting to switch to the Nvidia card in nvidia-settings (tried on almost 
all of the drivers available, including 331.38) resulted in an error message, 
in a new window, with no text.
  prime-switch in terminal gives this output: Segmentation fault (core dumped)
  Sudoing the process gives no output at all. No graphical performance boost 
either, still the Intel card...

  sudo prime-select nvidia gives this output:
  Error: alternatives are not set up properly
  Error: nvidia mode can't be enabled

  I've also tried Bumblebee (not PPA) a few times, but it's also unable
  to switch.

  I'm able to use the Intel card temporary, but I would really like to
  be able to use the full power of my computer...

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: nvidia-prime 0.6.2
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Apr 19 20:52:42 2014
  InstallationDate: Installed on 2014-04-17 (1 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  SourcePackage: nvidia-prime
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1310023/+subscriptions

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