Arch Linux

Superadmin

Member

Registered: 2021-08-22

Posts: 92

Graphics Related Question for Lenovo Legion 5[ANSWERED]

I am trying to install arch on my main daily driver...
Problem is It already have some issues with all of its model
You can look in this Post to find out about what sort of issues are there?

This post is sort of queries I have regarding some things that I didn't understand.....

1. Does PRIME works on NVIDIA/amd-igpu ? I have Amd 4800H (More info Here) and 1660 Ti
I actually am enquiring about the official method that NVIDIA supports i.e PRIME_GPU_offloading
I know there is also the optimus-manager but there is a issue on my laptop regarding completely turning off the GPU? (Please see this post to understand more clearly)

2. Does prime completely turns off the GPU? I mean does it unloads the drivers or modules when booting up while using PRIME_GPU_offloading?

3. So let me consider this scenario if I open up a application using

prime-run Minecraft

What is it going to use as default API ( Is is going to render graphics using VULKAN or GLX(extension) with OPENGL ?

4. Isn't there easy way to enable nvidia as primary GPU while using PRIME GPU Offloading ?
    I mean in this article i.e PRIME , it says to create Xorg configuration files with system info that does not matches with mine?
    So I am just afraid on how to create the Xorg configuration files that has my own AMD 4800H System info and 1660 Ti

5. In Lenovo Legion 5 Backlight fix (GitHub Post)
    @x1unix talks about

Open /etc/default/grub and modify GRUB_CMDLINE_LINUX_DEFAULT variable:

GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
- GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
+ GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noveau.modeset=0 acpi_backlight=native"

I am not used to with github so can anyone explain me what this + and - sign means
And this guy is calling echo Debian. If I am using arch what kind of differences will be there?
And I am specially so afraid to follow this method because I am a newbie and I have no idea what this "quite splash" "noveau.modeset=0" "acpi_backlight=native" does?
Can any one please help me understand what this lines does I just want to know the function that is going to change because of this extra added lines?

I haven't actually installed yet so this is just some question that I wanted to sort out before hopping into installing such things. 
Have a great day!!

Last edited by Superadmin (2021-09-02 12:22:39)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,310

Re: Graphics Related Question for Lenovo Legion 5[ANSWERED]

We normally dislike omnibus threads that try to solve too many problems at once but there are enough tie ins and specific targeted questions here. Maybe change the title so that it reflects that you are asking a compatibility question for this specific laptop model instead of the generic and non-descript one that you currently have.

1. It should the underlying bits have been added as of the newer driver versions.

2. The point of the PRIME method is that all drivers are loaded and active, but the nvidia GPU is put into a low power state if not actively used by something, the full power off as described in runtime power management has as far as I know not been implemented on AMD CPUs yet, so a bit of a power draw will still remain if you opt for the PRIME offloading method.

3. That will trigger the relevant logistics so that minecraft renders on the dedicated Nvidia GPU instead of the integrated AMD GPU. This isn't related to the graphics API which is ultimately used that depends on how the application has been developed. In this case it would use OpenGL. If you were to use a game that uses vulkan that would be vulkan.

4. If you want to do that approach it's potentially a bit clearer if you follow https://wiki.archlinux.org/title/NVIDIA … phics_only instead. The only thing you have to adjust in that config is the MatchDriver line and use amdgpu instead of i915 (... you can even leave the Identifier "intel" if you can stomach it, this is just a value that has to be present, the name can be freely chosen)

5. The +/- is a difference information, meaning to say you should remove the line indicated by the - and replace it with the line after the +. The actual file should only contain the + line without the leading + after you've done your edit. In general these are kernel parameters that affect how the kernel handles things. In this particular example the acpi_backlight=native is the main thing you want to set as that will change the logic the kernel will use for setting the backlight. The nouveau parameter shouldn't be required and will in fact be irrelevant if you install the nvidia drivers. quiet will silence a few boot logs and splash is relevant if you configure something like plymouth

In general these are indeed quite beginnery questions. What's your motivation for attempting to install Arch Linux in particular? It's not really intended for beginners and there will be quite a few concepts and things you need to learn if you want to be effective in using and maintaining an Arch install.

Last edited by V1del (2021-09-02 08:41:50)

Superadmin

Member

Registered: 2021-08-22

Posts: 92

Re: Graphics Related Question for Lenovo Legion 5[ANSWERED]

In general these are indeed quite beginnery questions. What's your motivation for attempting to install Arch Linux in particular? It's not really intended for beginners and there will be quite a few concepts and things you need to learn if you want to be effective in using and maintaining an Arch install.

Thanks a lot..... I know how beginner I am but I will say I have learned a lot from Linux. I have a lot of years to come to learn limitless imagination to be made possible on Linux. I have been Ubuntu user first. I am currently a fedora user now. Considering what I wanted to achieve on computing world.... Linux has all that for me and I want to learn that all those things step wise step. I know such beginner would have a bad time on arch and I don't have any idea if beginner like me has any place on Arch community. I am afraid they won't like me in particular because I will be asking a lot of beginner questions. But as a whole I loved arch and how any beginner can create their base with Arch Wiki. But I love making mistakes and learn from the hazard I made. Actually I was introduced to Linux with this hazard. " And Why arch though !!" You might ask....I love every linux out there.... I loved Ubuntu... I actually am atleast a stabel user in fedora to be honest. And now Arch has made me crazy about everything it has. I will try to make mistakes and learn a lot of things from them and become a "Actual Arch Linux User" that is what is famous Arch for......

I have no computer background and don't have any experience with technology that you guys are more familiar with......
But Becoming a good user in linux and also promote linux as a whole is what I aim for
I know this kind of commitments don't suit to the newbiest git out there in the universe but this is to say that if this newbiest user can do it.... I promise anyone can do it if they have a passion to learn things. It's not just limited to linux or technology.

I do really need to good guide and I will try my best to learn on my own through any possible internet medium and lots of "this" kind of beginner level question will follow

Have a great day V1del

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,310

Re: Graphics Related Question for Lenovo Legion 5[ANSWERED]

If you already have general linux experience you'll probably learn in time, I was just somewhat estranged by the bootloader/kernel param question as that's a concept one normally becomes at least tangentially familiar with on other distros as well.