Ytdyklly

after upgrading my machine to 18.04 from 16.04 I noticed that my Nvidia driver is no longer installed and after I reinstalled the driver I'm getting a black screen I've got such a problem before and fixed it with manually installing the Nvidia driver instead of using autoinstall or apt-get install Nvidia (number goes here).
I've tried all the method of installation mentioned here
and read almost all topic about this problem on askubuntu, its almost 2 weeks now and I'm unable to find a solution to this problem

information you might need

lspci | grep VGA

02:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1)



ubuntu-drivers devices

== /sys/devices/pci0000:00/0000:00:01.1/0000:02:00.0 ==

modalias : pci:v000010DEd000013C2sv00001458sd0000367Abc03sc00i00

vendor   : NVIDIA Corporation

model    : GM204 [GeForce GTX 970]

driver   : nvidia-driver-415 - third-party free recommended

driver   : nvidia-driver-390 - third-party free

driver   : nvidia-driver-396 - third-party free

driver   : nvidia-driver-410 - third-party free

driver   : xserver-xorg-video-nouveau - distro free builtin



nvidia-detector 

none



sudo lshw -numeric -C display

*-display UNCLAIMED       

       description: VGA compatible controller

       product: GM204 [GeForce GTX 970] [10DE:13C2]

       vendor: NVIDIA Corporation [10DE]

       physical id: 0

       bus info: pci@0000:02:00.0

       version: a1

       width: 64 bits

       clock: 33MHz

       capabilities: pm msi pciexpress vga_controller bus_master cap_list

       configuration: latency=0

       resources: memory:f2000000-f2ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f3000000-f307ffff

  *-display UNCLAIMED

       description: Display controller

       product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:412]

       vendor: Intel Corporation [8086]

       physical id: 2

       bus info: pci@0000:00:02.0

       version: 06

       width: 64 bits

       clock: 33MHz

       capabilities: msi pm bus_master cap_list

       configuration: latency=0

       resources: memory:f3400000-f37fffff memory:d0000000-dfffffff ioport:f000(size=64)



##glxinfo -B

name of display: :1

display: :1  screen: 0

direct rendering: Yes

Extended renderer info (GLX_MESA_query_renderer):

    Vendor: VMware, Inc. (0xffffffff)

    Device: llvmpipe (LLVM 7.0, 256 bits) (0xffffffff)

    Version: 18.2.8

    Accelerated: no

    Video memory: 15904MB

    Unified memory: no

    Preferred profile: core (0x1)

    Max core profile version: 3.3

    Max compat profile version: 3.1

    Max GLES1 profile version: 1.1

    Max GLES[23] profile version: 3.0

OpenGL vendor string: VMware, Inc.

OpenGL renderer string: llvmpipe (LLVM 7.0, 256 bits)

OpenGL core profile version string: 3.3 (Core Profile) Mesa 18.2.8

OpenGL core profile shading language version string: 3.30

OpenGL core profile context flags: (none)

OpenGL core profile profile mask: core profile



OpenGL version string: 3.1 Mesa 18.2.8

OpenGL shading language version string: 1.40

OpenGL context flags: (none)



OpenGL ES profile version string: OpenGL ES 3.0 Mesa 18.2.8

OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00



##uname -a 

Linux LeLouch 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

edit i fixed the problem by updating the kernel

i've spent 3 weeks now with this and the problem was the grub boot loader needed to be updated after the linux-header update i used update-grub every time but i fail to notice that the main grub boot loader was on another distro so i needed to update that grub and that fixed my problem.
all thanks to @BarBar1234

disable Secure Boot in BIOS, as Secure Boot blocks the nvidia modules from being loaded in this case.