Ubuntu – Trying to install nvidia driver for ubuntu Desktop 18.04 LTS

Trying to install nvidia driver for ubuntu Desktop 18.04 LTS
following this link.
Followed all the tips from the above link.

But some what confused in terms of:
Whether I am using nvidia driver or nouveau?
Whether i am using the right version of nvidia or not? I wanted to use the version 390.

I am having Nvidia GTX 1060 and using Ubuntu Linux Desktop 18.04 LTS.

lspci -k | grep -EA2 'VGA|3D'  
01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] (rev a1)
    Subsystem: Dell GP106 [GeForce GTX 1060 6GB]
    Kernel driver in use: nouveau

The above command shows that i am using nouveau

while the additional driver shows that i am using nvidia driver

Don't know what to trust?

Edit1
Thanks Luis for your answer. Based on your comments when i am trying to install 396 driver…I am getting the following errors:

sudo apt install nvidia-driver-396
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nvidia-driver-396 : Depends: nvidia-dkms-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: nvidia-kernel-source-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: nvidia-compute-utils-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: libnvidia-decode-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: libnvidia-encode-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: nvidia-utils-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: xserver-xorg-video-nvidia-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Depends: libnvidia-cfg1-396 (= 396.24-0ubuntu0~gpu18.04.1) but it is not going to be installed
                     Recommends: libnvidia-decode-396:i386 (= 396.24-0ubuntu0~gpu18.04.1)
                     Recommends: libnvidia-encode-396:i386 (= 396.24-0ubuntu0~gpu18.04.1)
                     Recommends: libnvidia-ifr1-396:i386 (= 396.24-0ubuntu0~gpu18.04.1)
                     Recommends: libnvidia-fbc1-396:i386 (= 396.24-0ubuntu0~gpu18.04.1)
E: Unable to correct problems, you have held broken packages.

and then
when

sudo apt install nvidia-settings
Reading package lists... Done
Building dependency tree       
Reading state information... Done
nvidia-settings is already the newest version (396.24-0ubuntu0~gpu18.04.1).
nvidia-settings set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

Edit2
Tried this link
Even the proprietary driver install from nvidia didn't worked. nouveau is very much stuck and not going out even when it's being listed in the blacklisted and tried to removed it.

Edit 3
Reinstall didn't solved the issue…seems that it's common bug as mentioned here

Edit 4
Tried these

sudo apt purge nvidia-390
sudo apt install nvidia-kernel-source-396
sudo apt install nvidia-driver-396

and then(added the nomodeset entry)

sudo vi /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"

After reboot when i issue this command:

lspci -k | grep -EA2 'VGA|3D' 
01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] (rev a1)
    Subsystem: Dell GP106 [GeForce GTX 1060 6GB]
    Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

But the issue is now I have much lower resolution – bigger fonts. How to fix that? What does this line means:
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
That it has all the 4 modules in the order it has been displayed?
Current resolution is

xdpyinfo | awk '/dimensions/{print $2}'
800x600

With this change, Secondary monitor has stopped working now.
xrandr

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 800 x 600, maximum 800 x 600
default connected primary 800x600+0+0 0mm x 0mm
   800x600       75.00* 

And it seems this is the maximum resolution that i can get based on the above output.

Edit5
Reverted back the grub nomodeset entry to have the normal resolution. After reboot and closely looking at the log files, this is what i have found(just the relevant lines)

/var/log# cat gpu-manager.log
can't access /run/u-d-c-nvidia-was-loaded file
can't access /opt/amdgpu-pro/bin/amdgpu-pro-px
Looking for nvidia modules in /lib/modules/4.15.0-20-generic/updates/dkms
Found nvidia module: nvidia.ko
Looking for amdgpu modules in /lib/modules/4.15.0-20-generic/updates/dkms
Is nvidia loaded? no
Was nvidia unloaded? no
Is nvidia blacklisted? no
Is intel loaded? yes
Is nouveau loaded? yes
Is nouveau blacklisted? yes
Is nvidia kernel module available? yes
Is amdgpu kernel module available? no
Vendor/Device Id: 8086:3e92
BusID "PCI:0@0:2:0"
Has amd? no
Has intel? yes
Has nvidia? yes
How many cards? 2
The number of cards has changed!
Has the system changed? Yes
System configuration has changed
Unsupported discrete card vendor: 8086
Nothing to do

Xorg.0.log
[     5.649] (--) PCI:*(0:1:0:0) 10de:1c03:1028:11d7 rev 161, Mem @ 0xeb000000/16777216, 0xa0000000/268435456, 0xb0000000/33554432, I/O @ 0x0000e000/128, BIOS @ 0x????????/131072
[     5.649] (II) LoadModule: "glx"
[     5.649] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[     5.649] (II) Module glx: vendor="X.Org Foundation"
[     5.649]    compiled for 1.19.6, module version = 1.0.0
[     5.649]    ABI class: X.Org Server Extension, version 10.0
[     5.649] (==) Matched nouveau as autoconfigured driver 0
[     5.649] (==) Matched modesetting as autoconfigured driver 1
[     5.649] (==) Matched fbdev as autoconfigured driver 2
[     5.649] (==) Matched vesa as autoconfigured driver 3
[     5.649] (==) Assigned the driver to the xf86ConfigLayout
[     5.649] (II) LoadModule: "nouveau"
[     5.650] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
[     5.650] (II) Module nouveau: vendor="X.Org Foundation"
[     5.650]    compiled for 1.19.3, module version = 1.0.15
[     5.650]    Module class: X.Org Video Driver
[     5.650]    ABI class: X.Org Video Driver, version 23.0
[     5.650] (II) LoadModule: "modesetting"
[     5.650] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[     5.650] (II) Module modesetting: vendor="X.Org Foundation"
[     5.650]    compiled for 1.19.6, module version = 1.19.6
[     5.650]    Module class: X.Org Video Driver
[     5.650]    ABI class: X.Org Video Driver, version 23.0
[     5.650] (II) LoadModule: "fbdev"
[     5.650] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[     5.650] (II) Module fbdev: vendor="X.Org Foundation"
[     5.650]    compiled for 1.19.3, module version = 0.4.4
[     5.650]    Module class: X.Org Video Driver
[     5.650]    ABI class: X.Org Video Driver, version 23.0
[     5.650] (II) LoadModule: "vesa"
[     5.650] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[     5.650] (II) Module vesa: vendor="X.Org Foundation"
[     5.650]    ABI class: X.Org Video Driver, version 23.0
[     5.650] (II) NOUVEAU driver Date:   Fri Apr 21 14:41:17 2017 -0400
[     5.650] (II) NOUVEAU driver for NVIDIA chipset families :
[     5.650]    RIVA TNT        (NV04)
[     5.650]    RIVA TNT2       (NV05)
[     5.650]    GeForce 256     (NV10)
[     5.651]    GeForce 2       (NV11, NV15)
[     5.651]    GeForce 4MX     (NV17, NV18)
[     5.651]    GeForce 3       (NV20)
[     5.651]    GeForce 4Ti     (NV25, NV28)
[     5.651]    GeForce FX      (NV3x)
[     5.651]    GeForce 6       (NV4x)
[     5.651]    GeForce 7       (G7x)
[     5.651]    GeForce 8       (G8x)
[     5.651]    GeForce GTX 200 (NVA0)
[     5.651]    GeForce GTX 400 (NVC0)
[     5.651] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[     5.651] (II) FBDEV: driver for framebuffer: fbdev
[     5.651] (II) VESA: driver for VESA chipsets: vesa
[     5.651] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[     5.769] (EE) [drm] Failed to open DRM device for pci:0000:01:00.0: -19
[     5.769] (EE) open /dev/dri/card0: No such file or directory
[     5.769] (WW) Falling back to old probe method for modesetting
[     5.769] (EE) open /dev/dri/card0: No such file or directory
[     5.769] (II) Loading sub module "fbdevhw"
[     5.769] (II) LoadModule: "fbdevhw"
[     5.770] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[     5.770] (II) Module fbdevhw: vendor="X.Org Foundation"
[     5.770]    compiled for 1.19.6, module version = 0.0.2
[     5.770]    ABI class: X.Org Video Driver, version 23.0
[     5.770] (**) FBDEV(1): claimed PCI slot 1@0:0:0
[     5.770] (II) FBDEV(1): using default device
[     5.770] (WW) Falling back to old probe method for vesa
[     5.770] (EE) Screen 0 deleted because of no matching config section.
[     5.770] (II) FBDEV(0): Creating default Display subsection in Screen section
        "Default Screen Section" for depth/fbbpp 24/32
[     5.770] (==) FBDEV(0): Depth 24, (==) framebuffer bpp 32
[     5.770] (==) FBDEV(0): RGB weight 888
[     5.770] (==) FBDEV(0): Default visual is TrueColor
[     5.770] (==) FBDEV(0): Using gamma correction (1.0, 1.0, 1.0)
[     5.770] (II) FBDEV(0): hardware: EFI VGA (video memory: 2400kB)
[     5.770] (II) FBDEV(0): checking modes against framebuffer device...
[     5.770] (II) FBDEV(0): checking modes against monitor...
[     5.770] (--) FBDEV(0): Virtual size is 800x600 (pitch 800)
[     5.770] (**) FBDEV(0):  Built-in mode "current": 48.0 MHz, 46.9 kHz, 75.1 Hz
[     5.770] (II) FBDEV(0): Modeline "current"x0.0   48.00  800 832 928 1024  600 604 608 624 -hsync -vsync -csync (46.9 kHz b)
[     5.770] (==) FBDEV(0): DPI set to (96, 96)
[     5.770] (II) Loading sub module "fb"
[     5.770] (II) LoadModule: "fb"
[     5.770] (II) Loading /usr/lib/xorg/modules/libfb.so
[     5.770] (II) Module fb: vendor="X.Org Foundation"
[     5.770]    compiled for 1.19.6, module version = 1.0.0
[     5.770]    ABI class: X.Org ANSI C Emulation, version 0.4
[     5.770] (**) FBDEV(0): using shadow framebuffer
[     5.770] (II) Loading sub module "shadow"
[     5.770] (II) LoadModule: "shadow"
[     5.770] (II) Loading /usr/lib/xorg/modules/libshadow.so
[     5.772] (II) Module shadow: vendor="X.Org Foundation"
[     5.772]    compiled for 1.19.6, module version = 1.1.0
[     5.772]    ABI class: X.Org ANSI C Emulation, version 0.4
[     5.772] (II) UnloadModule: "vesa"
[     5.772] (II) Unloading vesa
[     5.772] (==) Depth 24 pixmap format is 32 bpp
[     5.772] (II) FBDEV(0): FBIOBLANK: Invalid argument (Screen blanking not supported by kernel - disabling)
[     5.773] (==) FBDEV(0): Backing store enabled
[     5.773] (==) FBDEV(0): DPMS enabled
[     5.773] (==) RandR enabled
[     5.774] (II) SELinux: Disabled on system
[     5.775] (II) AIGLX: Screen 0 is not DRI2 capable
[     5.775] (EE) AIGLX: reverting to software rendering

Edit 6
Still not resolved for me.
One intermittent delay today. Looked into dmesg

# dmesg | grep nvidia
[    2.391066] nvidia: loading out-of-tree module taints kernel.
[    2.391070] nvidia: module license 'NVIDIA' taints kernel.
[    2.393241] nvidia: module verification failed: signature and/or required key missing - tainting kernel
[    2.397378] nvidia-nvlink: Nvlink Core is being initialized, major device number 240
[    2.397558] nvidia 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem
[    2.398536] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  396.24  Wed Apr 25 23:54:18 PDT 2018
[    2.399519] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[    2.399519] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 0
[    4.259151] nvidia-uvm: Loaded the UVM driver in 8 mode, major device number 238
[    7.067363] nvidia-modeset: Allocated GPU:0 (GPU-2299f1b5-2a33-6f69-67d2-919f812a967a) @ PCI:0000:01:00.0

Edit 7
Yesterday got one Comment from "Organic Marble" – I thought let me try during the weekend. But before starting as a good practice – i wanted to record my current state and issued these commands:

ashu# lspci -k | grep -EA2 'VGA|3D'
01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] (rev a1)
    Subsystem: Dell GP106 [GeForce GTX 1060 6GB]
    Kernel driver in use: nvidia

My /etc/default/grub has

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

/var/log# cat gpu-manager.log
log_file: /var/log/gpu-manager.log
last_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
new_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
can't access /opt/amdgpu-pro/bin/amdgpu-pro-px
Looking for nvidia modules in /lib/modules/4.15.0-22-generic/updates/dkms
Found nvidia module: nvidia.ko
Looking for amdgpu modules in /lib/modules/4.15.0-22-generic/updates/dkms
Is nvidia loaded? yes
Was nvidia unloaded? no
Is nvidia blacklisted? no
Is intel loaded? yes
Is radeon loaded? no
Is radeon blacklisted? no
Is amdgpu loaded? no
Is amdgpu blacklisted? no
Is amdgpu versioned? no
Is amdgpu pro stack? no
Is nouveau loaded? no
Is nouveau blacklisted? yes
Is nvidia kernel module available? yes
Is amdgpu kernel module available? no
Vendor/Device Id: 8086:3e92
BusID "PCI:0@0:2:0"
Is boot vga? no
Vendor/Device Id: 10de:1c03
BusID "PCI:1@0:0:0"
Is boot vga? yes
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card1", driven by "nvidia-drm"
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card1", driven by "nvidia-drm"
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card1", driven by "nvidia-drm"
Found "/dev/dri/card0", driven by "i915"
Number of connected outputs for /dev/dri/card0: 0
Does it require offloading? no
last cards number = 2
Has amd? no
Has intel? yes
Has nvidia? yes
How many cards? 2
Has the system changed? No
Unsupported discrete card vendor: 8086
Nothing to do




 root@ashu-XPS-8930:/var/log# lshw -c video 2>&1 | grep driver
           configuration: driver=nvidia latency=0
           configuration: driver=i915 latency=0

root@ashu-XPS-8930:/var/log# dmesg | grep nvidia
[    2.438396] nvidia: loading out-of-tree module taints kernel.
[    2.438399] nvidia: module license 'NVIDIA' taints kernel.
[    2.440419] nvidia: module verification failed: signature and/or required key missing - tainting kernel
[    2.444471] nvidia-nvlink: Nvlink Core is being initialized, major device number 240
[    2.444631] nvidia 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem
[    2.449781] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  396.24.02  Thu May 24 03:44:56 PDT 2018
[    2.450402] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[    2.450403] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 1
[    4.272315] nvidia-uvm: Loaded the UVM driver in 8 mode, major device number 238
[    7.201052] nvidia-modeset: Allocated GPU:0 (GPU-2299f1b5-2a33-6f69-67d2-919f812a967a) @ PCI:0000:01:00.0

And additional drivers also says the .

Yes, it's fixed but how and when? I have no idea?
Thanks everybody for your help and suggestions.

Edit 8
Was able to fix on my Dell XPS 9560 laptop also.
One should check this file:

/etc/modprobe.d/disable-nouveau.conf
blacklist nouveau
blacklist vga16fb
blacklist rivafb
blacklist nvidiafb
blacklist rivatv
blacklist amd76_edac
options nouveau modeset=0