@openminded: Thanks for digging that out.
I did get some warning about this when I was installing "video-intel-nvidia-440xx-prime" Could not screenshot it as I was in tty/cli mode but it was something which indicated that this is not the recommended driver.
Anyway, this is not a show stopper but I just 'had' to explore if I can eke out a better GUI performance. I can live with my current situation until there is some BIOS or other software update from DELL.
Here are some of the steps I followed. This may help other people with similar issues.
[kc@kc-manjaro FAHClient]$ sudo cp /etc/X11/xorg.conf.d/90-mhwd.conf /etc/X11/xorg.conf.d/90-mhwd.conf.04Apr2020
[kc@kc-manjaro FAHClient]$ ls /etc/X11/xorg.conf.d/
00-keyboard.conf 90-mhwd.conf 90-mhwd.conf.04Apr2020
[kc@kc-manjaro FAHClient]$ sudo mhwd -r pci video-nvidia-418xx
[sudo] password for kc:
> Removing video-nvidia-418xx...
Has lib32 support: true
Processing classid: 0300
Processing classid: 0302
error: failed to prepare transaction (could not satisfy dependencies)
:: removing nvidia-418xx-utils breaks dependency 'nvidia-utils' required by nvidia-system-monitor-qt
Error: pacman failed!
Error: script failed!
!!! Using the GUI for add remove programs - removing -
!!! nvidia-418xx-utils, nvidia-container-runtime 220.127.116.11 nvidia-container-toolkit 1.0.5-3
!!! nvidia-docker-compose 0.1.6-1, nvidia-system-monitor-qt 1.0-2
!!! Warning - ksysguard requires nvidia-utils, vulkan-icd-loader requires vulkan-driver
!!! Successfull ****
Reboot messed up my display completely. Screen went blank and I was not able to get to even TTY/CLI.
Fixed this by adding 'nomodeset' kernel param: https://itsfoss.com/fix-ubuntu-freezing/ and got to CLI. Now back on track to start playing with stuff.
At this stage, I lost my wifi too and had to fish out a Ethernet cable to connect to the router.
!!! Tried installing video-hybrid-intel-nvidia-440xx-prime and it said opencl-nvidia-418 is conflicting
$ sudo pacman -R opencl-nvidia-418xx
Now for the hybrid driver
$ pacman -i pci video-hybrid-intel-nvidia-440xx-prime -
This worked well too but generated some warning and errors:
warning: something on the lines of this is not the recommended driver or something like that.
errors: failed rmmod could not remove modules "drm-kms-helper" and "drm" - I ignored these errors.
!!! Now will try and install all the modules that I removed yesterday
sudo pacman -S opencl-nvidia-440xx nvidia-440x-utils
!! Installed perfectly
System reboot and voila - have full sddm/KDE. Things are great.
!! This step is Irrelevant for people who don't need docker - Now install the nvidia container stuff nvidia-418xx-utils, nvidia-container-runtime 18.104.22.168 nvidia-container-toolkit 1.0.5-3 nvidia-docker-compose 0.1.6-1,
!! Installed nvidia-system-monitor-qt 1.0-2 for keeping an eye on my nvidia card.
One niggling issue. For some reason wifi was not working even now. I encountered this problem earlier too when I installed Manjaro. Messing with video drivers would result in loss of wifi. At that time rebooting a couple of times solved the issue and that is what I did now too. Executed "shutdown -h now" once and then rebooted a couple of times and wifi is working without a single issue - it comes up automatically every time.
Realised that there is no substantial improvement with my FAH+GUI performance. I am still getting a slight UI lag when I am running FAH on nvidia GPU. Tried checking if there is a way to measure iGPU performance.
This is when @openminded came across this the dell posting:
Given this issue from Dell, I am suspending further attempts. Maybe a future BIOS update will improve the situation. Not sure if I should remove "video-hybrid-intel-nvidia-440xx-prime" and go back to "video-nvidia-440xx". Living with "video-hybrid-intel-nvidia-440xx-prime" for now.
Continuing to execute FAH. One final recommendation for FAH on laptops: Go to the BIOS and set your fan speed to Full/Performance especially for FAH. The kind of usage and temperatures generated by FAH will push your hardware to the absolute limit - way more than the most demanding games at UHD and highest FPS. And FAH will keep the hardware at the limit for hours at a time. On laptops, You should probably run FAH not more than 2-3 hrs continuously and not more than 6-7 hrs in a day. Do monitor your system temps at all times and ensure that your GPU does not stay above 75C for extended periods (more than an hour) and that your CPU does not stay above 85C for extended periods
You can run FAH continuously if you have a desktop and its better if you have water/liquid cooling