```shell
# step 0 - cleanup your existing drivers
sudo apt-get --purge remove "*nvidia*"
sudo apt-get --purge remove "*cuda*" "*cudnn*" "*cublas*" "*cufft*" "*cufile*" "*curand*" "*cusolver*" "*cusparse*" "*gds-tools*" "*npp*" "*nvjpeg*" "nsight*" "*nvvm*" "*libnccl*"

# step 0.1 - disable iommu
ll /sys/class/iommu/
# if this folder is empty, continue
# if the folder is not empty, see https://docs.dolphinics.com/latest/guides/iommu.html

sudo reboot

# step 1 - install drivers 
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update

# Search for available Nvidia drivers and install the latest version.
apt search --names-only nvidia-driver
sudo apt install nvidia-driver-560-open # or latest

sudo reboot

# step 1.1 - verify driver
nvidia-smi

# --- 

# step 2 - install cuda & cudnn
wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64/cuda-keyring_1.1-1_all.deb
sudo dpkg -i cuda-keyring_1.1-1_all.deb
sudo apt-get update

apt search --names-only cuda-toolkit
sudo apt install cuda-toolkit-12-6 # or latest

apt search --names-only cudnn
sudo apt install cudnn9-cuda-12-6 # or latest

sudo reboot

# step 2.1 - verify driver
nvidia-smi

# --- 

# step 3 - make cuda samples
sudo apt install git cmake

# Clone the Nvidia CUDA samples repository to test CUDA installation.
cd ~
git clone https://github.com/nvidia/cuda-samples
cd cuda-samples

make -j `nproc`

# --- 

# step 4 - test p2p 
./bin/x86_64/linux/release/deviceQuery
# look for "> Peer access from NVIDIA GeForce RTX 4090 (GPU0) -> NVIDIA GeForce RTX 4090 (GPU1) : {Yes/No}" 
# if you see Yes - stop, you already have p2p
# if you see No - continue

# --- 

# step 5 - uninstall official driver (just the driver)
sudo apt remove nvidia-driver-550-open
sudo apt remove nvidia-dkms-550-open
sudo apt remove nvidia-driver-550-server-open
sudo apt remove nvidia-dkms-550-server-open

# step 5.1 - double check
sudo dpkg -l | grep nvidia
# verify that all nvidia drivers / dkms are uninstalled 

# --- 

# step 6 - install patched driver
cd ~
git clone git@github.com:tinygrad/open-gpu-kernel-modules.git
cd open-gpu-kernel-modules

# step 6.1 - Building your driver
nvidia-smi # note down driver version - you've uninstalled the driver, but it should still be loaded in memory, if not, use `dpkg -l | grep nvidia` to grab the version `560.35.03-0ubuntu1` => `560.35.03`

git remote add upstream git@github.com:NVIDIA/open-gpu-kernel-modules.git
git fetch --all

# rebase patch with git or your preferred GUI
git rebase -Xignore-space-change -i upstream/560.35.03 # your driver version - make sure tag exists - you might have to deal with a conflicting README


# step 6.2 - make driver
./install.sh
# make modules -j$(nproc)
# sudo checkinstall make modules_install -j$(nproc)
# name = nvidia-driver-550-open-patch-tinygrad
# version = {driver-version}-p2p

sudo depmod

sudo reboot

# step 6.3 verify driver
nvidia-smi

# --- 

# step 7 - test p2p
cd ~/cuda-samples
./bin/x86_64/linux/release/deviceQuery
# look for "> Peer access from NVIDIA GeForce RTX 4090 (GPU0) -> NVIDIA GeForce RTX 4090 (GPU1) : {Yes/No}" 
# if you see Yes - stop, you're done
# if you see No - go to troubleshooting

# --- 

# troubleshooting
see https://morgangiraud.medium.com/multi-gpu-nvidia-p2p-capabilities-and-debugging-tips-fb7597b4e2b5
see https://morgangiraud.medium.com/multi-gpu-tinygrad-patch-4904a75f8e16

```