Dell G7 i7 w GTX1060 6gb

i honestly dont know how much that extra 0 matters but, yeah i would just copy and paste right from the tutorial since its the same. also you changed the format from : : to : . and that probably does matter.
i just checked my optimus.conf and i have it as 2:00:0 not 2:0:0 and its good so just put yours at 1:00:0

hah, its usually little things that screwing up the bigger ones. just make sure you didnt add or remove and characters from any other steps. done correctly this should work, dont give up

yes, update before doing anything.

when you get to GDM part and:
' sudo nano /usr/local/share/optimus.desktop '

copy/paste the second text box thats below, you dont need the first text box, its either or, but not both.

Thanks for all your help. I am updating now.

I gave it another go after full update. This time using terminal which made it much faster and I think more reliable. Unfortunately it no longer boots up. I get a blinking horizontal cursur and nothing happens. I will try to see if I can login from usb tomorrow. I am dual booting with windows (windows on sda, and Manjaro on sdb. maybe that is part of the problem?

You might check journal after booting to Live media

chroot back from the the live usb, and post the output:

dmesg | tail
and
inxi -Fxxxz

manjaro-chroot -a doesn't seem to work. I get "--> 0) ManjaroLinux" but if I select 0 I get "You can't mount 0"

it worked previously but wont work now?

No, I haven't been able to get manjaro-chroot -a to work. I tried with sudo just in case, but ended up the same. I found instructions to mount manually, and the text changed to red, but I think the output I got was for the live session.

[manjaro@manjaro-gnome ~]$ sudo manjaro-chroot -a
==> Detected systems:
 --> 0) ManjaroLinux
==> Select system to mount [0-0] : 
0
==> ERROR: You can't mount 0!
[manjaro@manjaro-gnome ~]$ ^C
[manjaro@manjaro-gnome ~]$ 

lsblk is as follows. Manjaro is installed on sdb2

loop0    7:0    0  74.9M  1 loop /run/miso/sfs/livefs
loop1    7:1    0 310.9M  1 loop /run/miso/sfs/mhwdfs
loop2    7:2    0 976.2M  1 loop /run/miso/sfs/desktopfs
loop3    7:3    0 461.5M  1 loop /run/miso/sfs/rootfs
sda      8:0    0 119.2G  0 disk 
├─sda1   8:1    0   260M  0 part 
├─sda2   8:2    0    16M  0 part 
├─sda3   8:3    0 118.5G  0 part 
└─sda4   8:4    0   499M  0 part 
sdb      8:16   0 931.5G  0 disk 
├─sdb1   8:17   0 373.8G  0 part 
└─sdb2   8:18   0 557.7G  0 part 
sdc      8:32   1  29.8G  0 disk 
├─sdc1   8:33   1   1.9G  0 part /run/miso/bootmnt
└─sdc2   8:34   1     4M  0 part 
sr0     11:0    1  1024M  0 rom  

if you didnt successfully chroot into your install then following that tutorial will do nothing for you as anything you did was only in the live session.
run gparted, it should of come with the gnome iso and check if any drives/partitions are mounted, if they are unmount them and try manjaro-chroot again

does your laptop have 2 drives or just one?

Two drives. Windows 10 on the first (ssd) and Manjaro is sharing the second drive. I add lsbsk listed above in previous post. I've posted it again below. Boot/esp partition is sda1 i believe.

No drives seem to be mounted.

lsblk

loop0    7:0    0  74.9M  1 loop /run/miso/sfs/livefs
loop1    7:1    0 310.9M  1 loop /run/miso/sfs/mhwdfs
loop2    7:2    0 976.2M  1 loop /run/miso/sfs/desktopfs
loop3    7:3    0 461.5M  1 loop /run/miso/sfs/rootfs
sda      8:0    0 119.2G  0 disk 
├─sda1   8:1    0   260M  0 part 
├─sda2   8:2    0    16M  0 part 
├─sda3   8:3    0 118.5G  0 part 
└─sda4   8:4    0   499M  0 part 
sdb      8:16   0 931.5G  0 disk 
├─sdb1   8:17   0 373.8G  0 part 
└─sdb2   8:18   0 557.7G  0 part 
sdc      8:32   1  29.8G  0 disk 
├─sdc1   8:33   1   1.9G  0 part /run/miso/bootmnt
└─sdc2   8:34   1     4M  0 part 
sr0     11:0    1  1024M  0 rom

Here is inxi -Fxxxzso you can see computer details.

System:
  Host: manjaro-gnome Kernel: 4.19.0-3-MANJARO x86_64 bits: 64 compiler: gcc 
  v: 8.2.1 Desktop: Gnome 3.30.1 wm: gnome-shell dm: GDM 3.30.0 
  Distro: Manjaro Linux 
Machine:
  Type: Laptop System: ASUSTeK product: GL752VW v: 1.0 serial: <filter> 
  Mobo: ASUSTeK model: GL752VW v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: GL752VW.214 date: 04/18/2016 
Battery:
  ID-1: BAT0 charge: 41.9 Wh condition: 43.5/42.0 Wh (104%) volts: 15.0/15.0 
  model: ASUSTeK ASUS Battery type: Li-ion serial: <filter> 
  status: Not charging cycles: 1 
CPU:
  Topology: Quad Core model: Intel Core i7-6700HQ bits: 64 type: MT MCP 
  arch: Skylake-S rev: 3 L2 cache: 6144 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 41488 
  Speed: 917 MHz min/max: 800/3500 MHz Core speeds (MHz): 1: 900 2: 900 
  3: 900 4: 900 5: 900 6: 900 7: 900 8: 900 
Graphics:
  Device-1: Intel HD Graphics 530 vendor: ASUSTeK driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:191b 
  Device-2: NVIDIA GM107M [GeForce GTX 960M] vendor: ASUSTeK driver: nouveau 
  v: kernel bus ID: 01:00.0 chip ID: 10de:139b 
  Display: x11 server: X.org 1.20.3 driver: nouveau compositor: gnome-shell 
  resolution: <xdpyinfo missing> 
  OpenGL: renderer: Mesa DRI Intel HD Graphics 530 (Skylake GT2) 
  v: 4.5 Mesa 18.2.3 compat-v: 3.0 direct render: Yes 
Audio:
  Device-1: Intel Sunrise Point-H HD Audio vendor: ASUSTeK 
  driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:a170 
  Sound Server: ALSA v: k4.19.0-3-MANJARO 
Network:
  Device-1: Intel Wireless 7265 driver: iwlwifi v: kernel port: e000 
  bus ID: 02:00.0 chip ID: 8086:095a 
  IF: wlp2s0 state: up mac: <filter> 
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASUSTeK driver: r8169 v: kernel port: d000 bus ID: 03:00.1 
  chip ID: 10ec:8168 
  IF: enp3s0f1 state: down mac: <filter> 
Drives:
  Local Storage: total: 1.06 TiB used: 147.4 MiB (0.0%) 
  ID-1: /dev/sda vendor: SanDisk model: SD8SNAT128G1002 size: 119.24 GiB 
  speed: 6.0 Gb/s serial: <filter> rev: 7002 scheme: GPT 
  ID-2: /dev/sdb vendor: Toshiba model: MQ01ABD100 size: 931.51 GiB 
  speed: 6.0 Gb/s rotation: 5400 rpm serial: <filter> rev: 2J scheme: GPT 
  ID-3: /dev/sdc type: USB vendor: Lexar model: USB Flash Drive 
  size: 29.83 GiB serial: <filter> rev: PMAP scheme: MBR 
Partition:
  ID-1: / size: 11.67 GiB used: 147.4 MiB (1.2%) fs: overlay source: ERR-102 
Sensors:
  System Temperatures: cpu: 51.0 C mobo: N/A 
  Fan Speeds (RPM): cpu: 1900 
Info:
  Processes: 255 Uptime: 25m Memory: 15.56 GiB used: 1.50 GiB (9.7%) 
  Init: systemd v: 239 Compilers: gcc: N/A Shell: bash v: 4.4.23 
  running in: gnome-terminal inxi: 3.0.27 

well the good thing is we know why prime didnt work, bad thing is you were never in your manjaro install, only thing you modified was the live session which does nothing for you. we need to get you chrooted and youll be good to follow the tutorial 1 more time.

if manjaro-chroot -a wont work then run sudo mhwd-chroot
this shows you how to use mhwd-chroot and get the right partiton mounted
https://wiki.manjaro.org/index.php?title=Restore_the_GRUB_Bootloader#Chroot_into_your_existing_Manjaro_Installation

Okay, hopefully this is it:

dmesg | tail

[ 1992.429033] ahci 0000:00:17.0: port does not support device sleep
[ 1992.856661] nouveau 0000:01:00.0: bus: MMIO read of 00000000 FAULT at 619444 [ IBUS ]
[ 2433.882852] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 2433.893117] ata3.00: configured for UDMA/133
[ 2433.903727] ahci 0000:00:17.0: port does not support device sleep
[ 2434.702870] ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 2435.029813] ata4.00: configured for UDMA/100
[ 2601.759135] audit: type=1130 audit(1542272663.400:75): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=pamac-system comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 2615.146542] audit: type=1131 audit(1542272676.790:76): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=pamac-system comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 2897.353505] EXT4-fs (sdb2): mounted filesystem with ordered data mode. Opts: (null)

inxi -Fxxxz

inxi -Fxxxz
12System:    12Host manjaro-gnome 12Kernel 4.19.0-3-MANJARO x86_64 12bits 64 12compiler gcc 12v 8.2.1 
           12Console N/A 12wm gnome-shell 12dm N/A 12Distro Manjaro Linux 
12Machine:   12Type Laptop 12System ASUSTeK 12product GL752VW 12v 1.0 12serial <filter> 
           12Mobo ASUSTeK 12model GL752VW 12v 1.0 12serial <filter> 12UEFI American Megatrends 12v GL752VW.214 
           12date 04/18/2016 
12Battery:   12ID-1 BAT0 12charge 41.8 Wh 12condition 43.5/42.0 Wh (104%) 12volts 15.0/15.0 
           12model ASUSTeK ASUS Battery 12type Li-ion 12serial <filter> 12status Not charging 12cycles 1 
12CPU:       12Topology Quad Core 12model Intel Core i7-6700HQ 12bits 64 12type MT MCP 12arch Skylake-S 12rev 3 
           12L1 cache 256 KiB 12L2 cache 6144 KiB 12L3 cache 6144 KiB 
           12flags lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 12bogomips 41488 
           12Speed 900 MHz 12min/max 800/3500 MHz 12Core speeds (MHz) 121 900 122 900 123 900 124 900 125 900 
           126 900 127 900 128 900 
12Graphics:  12Device-1 Intel HD Graphics 530 12vendor ASUSTeK 12driver i915 12v kernel 12bus ID 00:02.0 
           12chip ID 8086:191b 
           12Device-2 NVIDIA GM107M [GeForce GTX 960M] 12vendor ASUSTeK 12driver nouveau 12v kernel 
           12bus ID 01:00.0 12chip ID 10de:139b 
           12Display 12server X.org 1.20.3 12driver nouveau 12compositor gnome-shell 
           12resolution <xdpyinfo missing> 
           12OpenGL 12renderer Mesa DRI Intel HD Graphics 530 (Skylake GT2) 12v 4.5 Mesa 18.2.4 
           12compat-v 3.0 12direct render Yes 
12Audio:     12Device-1 Intel Sunrise Point-H HD Audio 12vendor ASUSTeK 12driver snd_hda_intel 12v kernel 
           12bus ID 00:1f.3 12chip ID 8086:a170 
           12Sound Server ALSA 12v k4.19.0-3-MANJARO 
12Network:   12Device-1 Intel Wireless 7265 12driver iwlwifi 12v kernel 12port e000 12bus ID 02:00.0 
           12chip ID 8086:095a 
           12IF wlp2s0 12state up 12mac <filter> 
           12Device-2 Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 12vendor ASUSTeK 
           12driver r8169 12v kernel 12port d000 12bus ID 03:00.1 12chip ID 10ec:8168 
           12IF enp3s0f1 12state down 12mac <filter> 
12Drives:    12Local Storage 12total 1.06 TiB 12used 6.65 GiB (0.6%) 
           12ID-1 /dev/sda 12vendor SanDisk 12model SD8SNAT128G1002 12size 119.24 GiB 12speed 6.0 Gb/s 
           12serial <filter> 12rev 7002 
           12ID-2 /dev/sdb 12vendor Toshiba 12model MQ01ABD100 12size 931.51 GiB 12speed 6.0 Gb/s 
           12serial <filter> 12rev 2J 
           12ID-3 /dev/sdc 12type USB 12vendor Lexar 12model USB Flash Drive 12size 29.83 GiB 
           12serial <filter> 12rev PMAP 
12Partition: 12ID-1 / 12size 547.97 GiB 12used 6.62 GiB (1.2%) 12fs ext4 12dev /dev/sdb2 
           12ID-2 /boot 12size 256.0 MiB 12used 30.8 MiB (12.0%) 12fs vfat 12dev /dev/sda1 
12Sensors:   12System Temperatures 12cpu 43.0 C 12mobo N/A 
           12Fan Speeds (RPM) 12cpu 1900 
12Info:      12Processes 246 12Uptime 53m 12Memory 15.56 GiB 12used 1.53 GiB (9.8%) 12Init systemd 12v 239 
           12Compilers 12gcc N/A 12Client shell wrapper 12v 4.4.23-release 12inxi 3.0.27 

now that your chrooted in
sudo pacman -Syyu
let it finish updating and then follow the tutorial step by step

remember, the terminal is your friend, trying to do it gui is more problematic

There is nothing to update. I did a full update before I did the tutorial. I did the tutorial using command line. Should I do it again, from this command line.

the only thing you updated if you werent chrooted in was your live session not your installation, you need to be chrooted in and then update

I updated before I followed the tutorial. I installed, booted from install, did full update, then followed tutorial. Upon reboot after tutorial it doesn't load at all.

It looks like nvidia isn't installed at all. Which is weird because that is the first step I did.

[manjaro-gnome /]# glxinfo | grep -i vendor
server glx vendor string: SGI
client glx vendor string: Mesa Project and SGI
    Vendor: Intel Open Source Technology Center (0x8086)
OpenGL vendor string: Intel Open Source Technology Center
[manjaro-gnome /]# sudo pacman -Syyu
:: Synchronizing package databases...
 core                                                146.9 KiB   380K/s 00:00 [############################################] 100%
 extra                                              1784.6 KiB  1711K/s 00:01 [############################################] 100%
 community                                             5.0 MiB   991K/s 00:05 [############################################] 100%
 multilib                                            183.8 KiB   901K/s 00:00 [############################################] 100%
:: Starting full system upgrade...
 there is nothing to do

remember nothing youve done before chroot did anything
post output of mhwd -li

you are still chroot right?

I mean with the original installation before it broke.

[manjaro-gnome /]# mhwd -li
> Installed PCI configs:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
          video-nvidia            2018.08.09               false            PCI
         network-r8168            2016.04.20                true            PCI


Warning: No installed USB configs!

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