Want to install graphics card after QubesOS 4.0.1 is installed. Will there be problems?

[interested_in_QubesOS]

The reason I want to do what the title of this post says is I want to dual boot, however my graphics card doesn't completely work without CSM and common wisdom says having that off for installing an OS for a UEFI machine will save me headache. I also can't change my default GPU, my UEFI changes it automatically depending on if my graphics card is sloted in.

My plan:

Step 1: Install Qubes OS 4.0.1 with CSM disabled and with no graphics card,

Step 2; do the needed tasks (updating VM's, setting up anti-evil maid, ect.),

Step 3; change CSM setting to enabled in UEFI menu,

Step 4; insert my Nvidia graphics card in the first PCIe slot,

Step 5; after all that start up my PC and install Nouveau drivers in dom0 if Qubes doesn't already have Nouveau drivers.

Good plan or no? What sort of problem(s) could I come come across, if any?

Unplugging my Windows install hard drive is probably a good idea.

[awokd]

'interested_in_QubesOS' via qubes-users wrote on 6/7/19 12:08 AM:

> The reason I want to do what the title of this post says is I want to dual boot, however my graphics card doesn't completely work without CSM and common wisdom says having that off for installing an OS for a UEFI machine will save me headache. I also can't change my default GPU, my UEFI changes it automatically depending on if my graphics card is sloted in.
>
> My plan:
> Step 1: Install Qubes OS 4.0.1 with CSM disabled and with no graphics card,

Try it first with CSM enabled; reason being Qubes will install in GRUB
mode without it so when you re-enable there wouldn't be a UEFI boot entry.

> Step 2; do the needed tasks (updating VM's, setting up anti-evil maid, ect.),
> Step 3; change CSM setting to enabled in UEFI menu,

Add nouveau.modeset=0 somewhere in here (double-check my spelling).

> Step 4; insert my Nvidia graphics card in the first PCIe slot,
> Step 5; after all that start up my PC and install Nouveau drivers in dom0 if Qubes doesn't already have Nouveau drivers.

Shouldn't need drivers if you do the modeset.

> Good plan or no? What sort of problem(s) could I come come across, if any?

Dual-booting is a pain. I did it for a while on one of my machines and
Windows kept breaking GRUB every major update. When you add the below
hard drive, you might have to regenerate your Qubes UEFI boot entry.
Search this list for efibootmgr if that happens.

> Unplugging my Windows install hard drive is probably a good idea.

> Agreed.

[interested_in_QubesOS]

"Try it first with CSM enabled; reason being Qubes will install in GRUB mode without it so when you re-enable there wouldn't be a UEFI boot entry."

Will it install MBR with CSM enabled? I only need GPT.
Important note: My CSM doesn't completely switch to legacy boot mode, like some other (bad) UEFI designs, hence why my Windows 10 install still works with CSM. It just adds support for older hardware and operating systems.

(Finally realized reply all makes my replies public, R.I.P. hopes and dreams of those who want to see my previous replies. XD)

[awokd]

'interested_in_QubesOS' via qubes-users wrote on 6/8/19 3:54 PM:

Might have had that backwards then, try CSM disabled first.

[Jules Diez]

> Dual-booting is a pain. I did it for a while on one of my machines and
> Windows kept breaking GRUB every major update. When you add the below
> hard drive, you might have to regenerate your Qubes UEFI boot entry.
> Search this list for efibootmgr if that happens.

I dual boot but i forget about a proper grub, default is for Qubes without any UEFI in BIOS and when I need to use Windows I activated all UEFI and boot manually on the bios setting. Working so far but not really nice to do ...