bbswitch unable to turn discrete graphics off

[Sahaj]

Problem : Unable to turn discrete graphics off after running sudo tee /proc/acpi/bbswitch <<<OFF

when i run -
--> sudo tee /proc/acpi/bbswitch <<<OFF
Output: OFF
--> cat /proc/acpi/bbswitch
Output : 0000:01:00.0 ON

--------------------------Laptop Details--------------------------------
Laptop: Acer Predator PH315-52
OS : UBUNTU 18.04.2 LTS
Nvidia Driver : 418.87
Kernel : 5.0.0-37-generic
Processors : Intel UHD 630 and Nvidia 1660 Ti
bbswitch version: 0.8-4ubuntu1
bumblebee version: 3.2.1+git20181231-103~bionicppa1

Installation instructions followed:
Mostly from here: https://gist.github.com/whizzzkid/37c0d365f1c7aa555885d102ec61c048

---------------------Exact instructions i followed----------------------
$ bash -c "$(curl -fsSL http://bit.ly/IGFWL-install)"

$ sudo apt update

# Installed Cuda 10.1 .deb package from nvidia website and driver 418.87 was automatically
  installed with the package(also prime-select was also installed with it)

$ sudo nano /etc/default/grub
# changed - GRUB_CMDLINE_LINUX_DEFAULT='pcie_port_pm=off acpi_backlight=none acpi_osi=Linux acpi_osi=! acpi_osi=\"Windows 2009\"'

$ sudo add-apt-repository ppa:bumblebee/testing

$ sudo apt update

# Installed synaptics package manager and then through it installed bumblebee,bumblebee-nvidia
  and primus(and all others which by default get installed with them like bbswitch)

$ sudo nano /etc/bumblebee/bumblebee.conf

# Changed 'Driver=' to 'Driver=nvidia'
  Bridge=primus
  KernelDriver=nvidia
  PMMethod=bbswitch
  LibraryPath=/usr/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu
  XorgModulePath=/usr/lib/x86_64-linux-gnu/xorg,/usr/lib/xorg/modules
  XorgConfFile=/etc/bumblebee/xorg.conf.nvidia

$ sudo nano /etc/modprobe.d/bumblebee.conf

# blacklist nvidia
  blacklist nvidia-current
  blacklist nvidia-current-updates
  blacklist nvidia_drm
  blacklist nvidia_uvm
  blacklist nvidia_modeset
  blacklist nvidiafb
  blacklist i2c-nvidia-gpu
  blacklist i2c-nvidia-gpu
  blacklist nouveau
  blacklist nvidia-current

$ sudo nano /etc/modules-load.d/modules.conf

# added following:
  i915
  bbswitch

#selected intel as prime profile
#Restarted laptop

----------------------------Results-------------------------------------
Afer fresh restart:

$ grep bumblebeed /var/log/syslog
Output:
Predator bumblebeed[3353]: Received Terminated signal.
Predator bumblebeed[3353]: Unable to disable discrete card.
Predator bumblebeed[7981]: /usr/sbin/bumblebeed started
Predator bumblebeed[7981]: Unable to disable discrete card.

$ lsmod | grep -i nouveau
Output: (Blank output) ## showing nouveau is not loaded

$ lsmod | grep nvidia
Output:
i2c_nvidia_gpu ## Handled it via "$ modprobe -r i2c_nvidia_gpu" but the problem still remains
                 ## and the outputs of all too remains the same
                 ## Blank output of "lsmod | grep nvidia" after unloading it using ablove command

$ cat /proc/acpi/bbswitch
Ouput:0000:01:00.0 ON

$ sudo tee /proc/acpi/bbswitch <<<OFF
Output:OFF

$ dmesg | grep bbswitch

[ 6.659422] bbswitch: loading out-of-tree module taints kernel.
[ 6.660407] bbswitch: module verification failed: signature and/or required key missing - tainting kernel
[ 6.661578] bbswitch: version 0.8
[ 6.662580] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[ 6.663575] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[ 6.665690] bbswitch: detected an Optimus _DSM function
[ 6.667873] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[ 18.818552] bbswitch: disabling discrete graphics
[ 114.697607] bbswitch: disabling discrete graphics
[ 114.697852] acpi_thermal_rel intel_pch_thermal wmi_bmof acer_wmi acer_wireless intel_lpss mac_hid soundcore sparse_keymap acpi_pad sch_fq_codel parport_pc ppdev lp parport bbswitch(OE) ip_tables x_tables autofs4 hid_generic usbhid i915 kvmgt vfio_mdev mdev vfio_iommu_type1 vfio kvm irqbypass i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm alx ahci mdio i2c_hid libahci i2c_nvidia_gpu hid wmi video pinctrl_cannonlake pinctrl_intel
[ 114.697897] bbswitch_off+0xbb/0x230 [bbswitch]
[ 114.697898] bbswitch_proc_write+0xb5/0xcc [bbswitch]
[ 446.444365] bbswitch: disabling discrete graphics

$ cat /proc/acpi/bbswitch
Ouput:0000:01:00.0 ON #############This is the problem,it should display OFF

$ optirun --status
Output: Bumblebee status: Ready (). X inactive. Discrete video card is on.

$ sudo bumblebeed --debug
[ 5280.409506] [DEBUG]Found card: 01:00.0 (discrete)
[ 5280.409517] [DEBUG]Found card: 00:02.0 (integrated)
[ 5280.409822] [DEBUG]Reading file: /etc/bumblebee/bumblebee.conf
[ 5280.409966] [INFO]Configured driver: nvidia
[ 5280.409972] [DEBUG]Skipping auto-detection, using configured driver 'nvidia'
[ 5280.410011] [DEBUG]bbswitch has been detected.
[ 5280.410016] [INFO]Switching method 'bbswitch' is available and will be used.
[ 5280.410019] [DEBUG]Active configuration:
[ 5280.410022] [DEBUG] bumblebeed config file: /etc/bumblebee/bumblebee.conf
[ 5280.410024] [DEBUG] X display: :8
[ 5280.410027] [DEBUG] LD_LIBRARY_PATH: /usr/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu
[ 5280.410046] [DEBUG] Socket path: /var/run/bumblebee.socket
[ 5280.410048] [DEBUG] pidfile: /var/run/bumblebeed.pid
[ 5280.410049] [DEBUG] xorg.conf file: /etc/bumblebee/xorg.conf.nvidia
[ 5280.410051] [DEBUG] xorg.conf.d dir: /etc/bumblebee/xorg.conf.d
[ 5280.410053] [DEBUG] Xorg binary: /usr/lib/xorg/Xorg
[ 5280.410076] [DEBUG] ModulePath: /usr/lib/x86_64-linux-gnu/xorg,/usr/lib/xorg/modules
[ 5280.410078] [DEBUG] GID name: bumblebee
[ 5280.410081] [DEBUG] Power method: bbswitch
[ 5280.410084] [DEBUG] Stop X on exit: 1
[ 5280.410088] [DEBUG] Driver: nvidia
[ 5280.410091] [DEBUG] Driver module: nvidia
[ 5280.410094] [DEBUG] Card shutdown state: 0
[ 5280.410099] [DEBUG]Configuration test passed.
[ 5280.410114] [ERROR]Daemon already running, pid 8219

--------------------------Attached Files-----------------------------
$ dmesg | grep -C8 bbswitch
Output : Attached ## shows video LNXVIDEO:00: Failed to change power
                     state to D3hot
# syslog
#xorg.0.log
# Information about my laptop