Comment 21 for bug 1310023

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