Download, patch, compile and install the newest stable Linux kernel with the ACS override patch (Ubuntu / Debian)

compile_newest_stable_kernel_with_acso_patch.sh

#!/bin/bash

function install_dependencies() {
	echo "Installing dependencies..."
	sudo apt -qq update
	sudo apt -qq install -y curl git wget
#	sudo apt -qq install -y bison flex kernel-package libelf-dev libssl-dev
	sudo apt -qq install -y bison flex libelf-dev libssl-dev
}

function init() {
	echo "Get the newest version of the script here: https://gist.github.com/mdPlusPlus/031ec2dac2295c9aaf1fc0b0e808e21a"

	echo "Initializing..."

	kernel_config=$(ls /boot/config-* | grep generic | sort -Vr | head -n 1)
	grub_config="/etc/default/grub"

	current_dir=$(pwd)
	working_dir=$(mktemp -d)
	cd "${working_dir}" || exit

	install_dependencies
}

function get_newest_versions() {
	echo "Retrieving newest version information..."

	stable_releases_3x_url="https://mirrors.edge.kernel.org/pub/linux/kernel/v3.x/"
	stable_releases_4x_url="https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/"
	stable_releases_5x_url="https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/"

	stable_releases_3x_html=$(curl -s "${stable_releases_3x_url}")
	stable_releases_4x_html=$(curl -s "${stable_releases_4x_url}")
	stable_releases_5x_html=$(curl -s "${stable_releases_5x_url}")

	stable_releases_combined_html="${stable_releases_3x_html}${stable_releases_4x_html}${stable_releases_5x_html}"
	stable_version=$(echo "${stable_releases_combined_html}" | grep -E -o 'linux-([0-9]{1,}\.)+[0-9]{1,}' | sort -Vru | head -n 1 | cut -d '-' -f 2)

	mainline_link=$(curl -s https://www.kernel.org/ | grep https://git.kernel.org/torvalds/t/linux- | grep -Po '(?<=href=")[^"]*')
	if ! [ -z "${mainline_link}" ]
	then
		mainline_version=$(echo "${mainline_link}" | cut -d '-' -f 2,3 | cut -d '.' -f 1,2)
	else
		mainline_version="unavailable"
	fi

	repo_pkg=$(apt search 'linux-source-' | grep 'linux-source' | cut -d '/' -f 1 | awk -F- 'NF<=3' | sort -Vr | head -n 1)
	#repo_version=$(echo "${repo_pkg}" | cut -d '-' -f 3)
	repo_version=$(apt search 'linux-source-' | grep 'linux-source' | sort -Vr | head -n 1 | cut -d ' ' -f 2)
}

function stable_or_mainline_or_repo() {
	get_newest_versions
	echo "Newest stable version is: ${stable_version}"
	echo "Mainline version is:      ${mainline_version}"
	echo "Repository version is:    ${repo_version}"
	echo -n "Do you want to get a [s]table, the newest [m]ainline release candidate or the newest kernel from your [r]epositories? [S/m/r] "
	read -r s_or_m_or_r

	echo -n "Do you want to apply the acs override patch? Kernels below 4.10 are not supported. [Y/n] "
	read -r acso

	echo -n "Do you want to apply the experimental AMD AGESA patch to fix VFIO setups on AGESA 0.0.7.2 and some others? [y/N] "
	read -r agesa

#	echo -n "Do you want to apply the experimental AMD Vega PCI reset patch? [y/N] "
#	read -r vega

	echo -n "Do you want to install the kernel and its headers after compilation? [Y/n] "
	read -r install

	if [[ -z "${install}" || "${install}" == "y" || "${install}" == "Y" ]]
	then
		echo -n "Do you want to make this kernel the new default? [Y/n] "
		read -r default
	fi

	echo -n "Do you want to install the kernel source? [y/N] "
	read -r source

	if [[ -z "${s_or_m_or_r}" || "${s_or_m_or_r}" == "s" || "${s_or_m_or_r}" == "S" ]]
	then
		stable_preparations
	else
		if [[ "${s_or_m_or_r}" == "m" || "${s_or_m_or_r}" == "M" ]]
		then
			if [ "${mainline_version}" == "unavailable" ]
			then
				echo "Mainline version currently unavailable. Exiting."
				exit
			else
				mainline_preparations
			fi
		else
			if [[ "${s_or_m_or_r}" == "r" || "${s_or_m_or_r}" == "R" ]]
			then
				repo_preparations
			else
				echo "Not a valid option. Exiting."
				exit
			fi
		fi
	fi
}

function try_acso_patch() {
	## TODO: I really should not do this manually ...

	acso_patch_5_12_13="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_5_12_13.patch"
	acso_patch_5_6_12="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_5_6_12.patch"
	acso_patch_5_4="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_5_4.patch"
	acso_patch_4_18="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_4_18.patch"
	acso_patch_4_17="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_4_17.patch"
	acso_patch_4_14="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_4_14.patch"
	acso_patch_4_10="https://raw.githubusercontent.com/mdPlusPlus/linux-acs-override/master/patches/acso_4_10.patch"

	acso_patch_4_18_ubuntu="https://gist.github.com/mdPlusPlus/bb3df6248ffc7c6b3772ae0901659966/raw/acso_4_18_ubuntu.patch"

	echo "Trying to apply acs override patch for 5.12.13+."
	wget -O ../acso_5_12_13.patch "${acso_patch_5_12_13}"
	if $(git apply --check ../acso_5_12_13.patch)
	then
		echo "Applying acs override patch for 5.12.13+."
		git apply ../acso_5_12_13.patch
	else

		echo "Trying to apply acs override patch for 5.6.12+."
		wget -O ../acso_5_6_12.patch "${acso_patch_5_6_12}"
		if $(git apply --check ../acso_5_6_12.patch)
		then
			echo "Applying acs override patch for 5.6.12+."
			git apply ../acso_5_6_12.patch
		else
			echo "Trying to apply acs override patch for 5.4+."
			wget -O ../acso_5_4.patch "${acso_patch_5_4}"
			if $(git apply --check ../acso_5_4.patch)
			then
				echo "Applying acs override patch for 5.4+."
				git apply ../acso_5_4.patch
			else
				echo "Trying to apply acs override patch for 4.18+."
				wget -O ../acso_4_18.patch "${acso_patch_4_18}"
				if $(git apply --check ../acso_4_18.patch)
				then
					echo "Applying acs override patch for 4.18+."
					git apply ../acso_4_18.patch
				else
					echo "Trying to apply acs override patch for 4.17+."
					wget -O ../acso_4_17.patch "${acso_patch_4_17}"
					if $(git apply --check ../acso_4_17.patch)
					then
						echo "Applying acs override patch for 4.17+."
						git apply ../acso_4_17.patch
					else
						echo "Trying to apply acs override patch for 4.14+."
						wget -O ../acso_4_14.patch "${acso_patch_4_14}"
						if $(git apply --check ../acso_4_14.patch)
						then
							echo "Applying acs override patch for 4.14+."
							git apply ../acso_4_14.patch
						else
							echo "Trying to apply acs override patch for 4.10+."
							wget -O ../acso_4_10.patch "${acso_patch_4_10}"
							if $(git apply --check ../acso_4_10.patch)
							then
								echo "Applying acs override patch for 4.10+."
								git apply ../acso_4_10.patch
							else
								echo "Last resort: Trying to apply acs override patch for Ubuntu repository kernel source."
								wget -O ../acso_4_18_ubuntu.patch "${acso_patch_4_18_ubuntu}"
								if $(git apply --check ../acso_4_18_ubuntu.patch)
								then
									echo "Applying acs override patch for Ubuntu repository kernel source."
									git apply ../acso_4_18_ubuntu.patch
								else
									echo "[ERROR]: Failed to apply acs override patch. Exiting."
									exit
								fi
								rm -f ../acso_4_18_ubuntu.patch
							fi
							rm -f ../acso_4_10.patch
						fi
						rm -f ../acso_4_14.patch
					fi
					rm -f ../acso_4_17.patch
				fi
				rm -f ../acso_4_18.patch
			fi
			rm -f ../acso_5_4.patch
		fi
		rm -f ../acso_5_6_12.patch
	fi
	rm -f ../acso_5_2_13.patch

	kernel_localversion+="-acso"
}

function try_agesa_patch() {
	## by reddit user https://www.reddit.com/user/hansmoman/
	## https://www.reddit.com/r/VFIO/comments/bqeixd/apparently_the_latest_bios_on_asrockmsi_boards/eo4neta
	agesa_patch="https://clbin.com/VCiYJ"
	agesa_patch_filename="agesa.patch"

	echo "Trying to apply AMD AGESA patch."
	wget -O ../${agesa_patch_filename} "${agesa_patch}"
	if $(git apply --check ../${agesa_patch_filename})
	then
		echo "Applying AMD AGESA patch."
		git apply ../${agesa_patch_filename}
	else
		echo "[ERROR]: Failed to apply AMD AGESA patch. Exiting."
		exit
	fi

	rm -f ../${agesa_patch_filename}

	kernel_localversion+="-agesa"
}

#function try_vega_patch() {
#	## Original by github user https://gist.github.com/numinit
#
#	vega_patch_new="https://gist.github.com/mdPlusPlus/1754d82b53269ead770133829874fbfd/raw/"
#	vega_patch="https://gist.githubusercontent.com/numinit/1bbabff521e0451e5470d740e0eb82fd/raw/0ec757c30cec041c3d0553bb246b5bc327d67abb/fix-vega-reset.patch"
#	vega_patch_filename="fix-vega-reset.patch"
#
#	echo "Trying to apply AMD Vega reset patch."
#	wget -O ../${vega_patch_filename} "${vega_patch_new}"
#
#	if $(git apply --check ../${vega_patch_filename})
#	then
#		echo "Applying AMD Vega reset patch."
#		git apply ../${vega_patch_filename}
#	else
#		rm -f ../${vega_patch_filename}
#		wget -O ../${vega_patch_filename} "${vega_patch}"
#
#		if $(git apply --check ../${vega_patch_filename})
#		then
#			echo "Applying AMD Vega reset patch."
#			git apply ../${vega_patch_filename}
#		else
#			echo "[ERROR]: Failed to apply AMD Vega reset patch. Exiting."
#			exit
#		fi
#	fi
#
#	rm -f ../${vega_patch_filename}
#
#	kernel_localversion+="-vega"
#}

function stable_preparations() {
	echo "The newest available stable kernel version is ${stable_version}. Kernels below 4.10 are not supported."
	echo -n "Which version do you want to download? [${stable_version}] "
	read -r user_version

	if  ! [ -z "${user_version}" ]
	then
		stable_version="${user_version}"
	fi

	kernel_version="${stable_version}"
	kernel_name="linux-${kernel_version}"


	## Test whether the version string starts with 3, 4, or 5 and sets the URL accordingly
	if [[ $stable_version == 5* ]]
	then
		stable_link="${stable_releases_5x_url}linux-${stable_version}.tar.xz"
	else
		if [[ $stable_version == 4* ]]
		then
			stable_link="${stable_releases_4x_url}linux-${stable_version}.tar.xz"
		else
			if [[ $stable_version == 3* ]]
			then
				stable_link="${stable_releases_3x_url}linux-${stable_version}.tar.xz"
			else
				echo "${stable_version} is not a vaild version number. Exiting."
				exit
			fi
		fi
	fi

	wget "${stable_link}"
	tar xf "${kernel_name}.tar.xz"
	cd "${kernel_name}" || exit

	independent_code
}

function mainline_preparations() {
	kernel_version="${mainline_version}"
	kernel_name="linux-${kernel_version}"

	wget "${mainline_link}"
	tar xf "${kernel_name}.tar.gz"
	cd "${kernel_name}" || exit

	independent_code
}

function repo_preparations() {
	kernel_name="${repo_pkg}"

	sudo apt install "${repo_pkg}"
	tar xf "/usr/src/${kernel_name}.tar.bz2"
	cd "${kernel_name}" || exit

	makefile_version=$(grep "^VERSION" Makefile |  tr -d '[:space:]' | cut -d '=' -f 2)
	makefile_patchlevel=$(grep "^PATCHLEVEL" Makefile|  tr -d '[:space:]' | cut -d '=' -f 2)
	makefile_sublevel=$(grep "^SUBLEVEL" Makefile |  tr -d '[:space:]' | cut -d '=' -f 2)
	#makefile_extraversion=$(grep "^EXTRAVERSION" Makefile|  tr -d '[:space:]' | cut -d '=' -f 2)

	if ! [ -z "${makefile_version}" ]
	then
		kernel_version="${makefile_version}"
		if ! [ -z "${makefile_patchlevel}" ]
		then
			kernel_version="${makefile_version}.${makefile_patchlevel}"
			if ! [ -z "${makefile_sublevel}" ]
			then
				kernel_version="${makefile_version}.${makefile_patchlevel}.${makefile_sublevel}"
			fi
		fi
	fi

	## linux-hwe (5.0.0-25.26~18.04.1) bionic; urgency=medium
	## ->
	## 5.0.0-25.26~18.04.1
	#kernel_version=$(head -n 1 debian/changelog | cut -d '(' -f 2 | cut -d ')' -f 1)
	## This somehow comes out empty when run in the script, but is successful when issued manually

	independent_code
}

function independent_code() {
	kernel_localversion=""

	if [[ -z "${acso}" || ( "${acso}" != "n" && "${acso}" != "N" ) ]]
	then
		try_acso_patch
	fi

	if [[ "${agesa}" == "y" || "${agesa}" == "Y" ]]
	then
		try_agesa_patch
	fi

#	if [[ "${vega}" == "y" || "${vega}" == "Y" ]]
#	then
#		try_vega_patch
#	fi

	cp "${kernel_config}" .config
	yes '' | make oldconfig

	##set xhci_hcd to load as a module instead of including it directly into the kernel
	##results in vfio_pci being able to grab usb controllers before xhci_hcd is able to
	sed -i -e 's/^CONFIG_USB_XHCI_HCD=y/CONFIG_USB_XHCI_HCD=m/g' .config

	##Enable AMD's HSA driver for ROCm support. Thanks at https://github.com/jfturcot
	sed -i -e 's/^#\ CONFIG_HSA_AMD\ is\ not\ set/CONFIG_HSA_AMD=y/g' .config

#	## Disable debug builds
#	sed -i -e 's/^CONFIG_DEBUG_INFO=y/CONFIG_DEBUG_INFO=n/g' .config
#	sed -i -e 's/^CONFIG_DEBUG_KERNEL=y/CONFIG_DEBUG_KERNEL=n/g' .config

	## check for versions containing only a single dot instead of two
	## but only when not choosing the repo source
	if [[ "${s_or_m_or_r}" != "r" && "${s_or_m_or_r}" != "R" ]]
	then
		dots=$(echo "${kernel_version}" | awk -F "." '{print NF-1}')
		dashes=$(echo "${kernel_version}" | awk -F "-" '{print NF-1}')
		if [ "${dots}" -lt 2 ]
		then
			if [ "${dashes}" -lt 1 ]
			then
				##5.1 -> 5.1.0
				kernel_version="${kernel_version}.0"
			else
				##5.1-rc1 -> 5.1.0-rc1
				kernel_version="$(echo "${kernel_version}" | sed 's/-/.0-/')"
			fi
			kernel_name="linux-${kernel_version}"
		fi
	fi

	## Install kernel source, thanks https://github.com/meberlein
	if [[ "${source}" == "y" || "${source}" == "Y" ]]
	then
		source_dir="/usr/src/linux-source-${kernel_version}${kernel_localversion}"
		sudo mkdir -p "${source_dir}"
		sudo cp -a "${working_dir}/${kernel_name}/." "${source_dir}"
	fi

	make clean
	make -j "$(nproc)" bindeb-pkg LOCALVERSION="${kernel_localversion}" || exit


	if [[ -z "${install}" || "${install}" == "y" || "${install}" == "Y" ]]
	then
		sudo dpkg -i ../linux-image-${kernel_version}${kernel_localversion}*.deb ../linux-headers-${kernel_version}${kernel_localversion}*.deb
		if [[ -z "${default}" || "${default}" == "y" || "${default}" == "Y" ]]
		then
			if [ "$(lsb_release -s -d | cut -d ' ' -f 1)" == "Ubuntu" ]
			then
				## removing previous commented line
				sudo sed -i -e 's/^#GRUB_DEFAULT=.*//g' "${grub_config}"

				## commenting current line
				sudo sed -i 's/^GRUB_DEFAULT=/#GRUB_DEFAULT=/' "${grub_config}"

				## adding line
				## TODO: multilanguage! only works for en-US (and other en-*) right now!
				grub_line="GRUB_DEFAULT=\"Advanced options for Ubuntu>Ubuntu, with Linux ${kernel_version}${kernel_localversion}\""
				sudo sed -i -e "s/^#GRUB_DEFAULT=.*/\0\n${grub_line}/" "${grub_config}"

				sudo update-grub
			fi
		fi
	fi

	cd "${current_dir}" || exit
	rm -rf "${working_dir}"

	echo "Done."
	echo "Make sure to check out https://github.com/gnif/vendor-reset"
}

## actual logic
init
stable_or_mainline_or_repo

Which kernel did you choose? I haven't tested this script for a while and it's possible the newest kernel versions aren't compatible with the included patches.

Edit: Yep, it fails on 5.7.5. Will see what I can do.

Fixed in newest version. Thanks for bringing that to my attention.

Yes, I initially had done 5.7.5. I just tried 5.7.5 again with the changes you made and got a different error, unfortunately. Any reason not to use an older kernel at this point? Here is what showed up after running the script, this came right after all of the driver stuff.

make[2]: *** [debian/rules:6: build] Error 2 dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
make[1]: *** [scripts/Makefile.package:83: bindeb-pkg] Error 2 make: *** [Makefile:1463: bindeb-pkg] Error 2

If it helps, I said yes to applying the override path, and the experimental and agesa patch (do I even need this?). I said no to the and vega reset patch because I don't think I'll need it since my vega will be running the host os. I also said yes to installing the kernel and headers along with making this kernel the default. Thanks.

In this case you won't need the Vega patch.
I also think you don't need the AGESA patch anymore with current AGESA (or kernel?) versions, but since I'm no longer using a VFIO setup myself it's hard to tell. Maybe you can find some forum posts by @gnif in the level1 forums about this.
It's possible these patches keep current kernels from building successfully. Try it again without them or use another version, I can't give any recommendations unfortunately. My last setup was on 5.3.x (I guess).

Let me see whether I can get it to build successfully with 5.7.5 somehow anyway.

EDIT: Builds fine with 5.7.6 and applied ACSO patch on Ubuntu 20.04. Try without VEGA and AGESA patch. Check this reddit thread to see whether you need the AGESA patch if your setup is not working.

AGESA patches are no longer needed, AMD rolled the fix into the AGESA.

Thanks for letting us know! Do you happen to know which exact AGESA version fixed this? I could leave a note about that in the script.

I was able to get 5.7.6 kernel to compile and install successfully. Unfortunately, my IOMMU groups didn't seem to change and the guest GPU is still in the same group as a bunch of other stuff. I was able to verify that I am running the patched kernel, so I am not sure what went wrong. Maybe my motherboard is just not good for this. I'll keep trying though.

trying to apply stable gives me the error:
Not a valid option. Exiting.

Doesn't matter what options i provide...

@dglb99: Did you start your kernel with pcie_acs_override=downstream, pcie_acs_override=multifunction or pcie_acs_override=downstream,multifunction? Because that's how you tell the kernel to actually make use of the ACSO feature.
Change your /etc/default/grub file so the line starting with GRUB_CMDLINE_LINUX_DEFAULT= looks similar to this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=on pcie_acs_override=downstream,multifunction".
Then run sudo update-grub.

Take a look at the actual patch to understand what these options mean.

@Steve1150: Are you sure you're not running a really outdated version of this script? Btw, it expects the answers to be lowercase (or empty).

@dglb99: I've just found an error in my script which led to the kernel not actually getting patched with the newest patch. Oops.
Should be fixed now. Please try again.

I've also added support for uppercase answers.

@mdPlusPlus, I redownloaded the script with the changes you just made and was able to compile the 5.7.6 kernel. I then edited the kernel start to include pcie_acs_override=downstream,multifunction. 20.04 PopOS no longer uses grub (I think the older versions used grub) but now uses systemd. Same concept though and I was able to figure it out. IOMMU groups are now separated correctly! Thank you so much for all your help, I don't think I would have been able to figure this all out on my own.
Now I just need the guest GPU to use the VirtIO drivers...

EDIT: I was able to get the vfio drivers to bind to the gpu, was not that bad

@mdPlusPlus Thank you for the script. I have been using it for a while and it's been working great.

Only thing I added to my fork was for saving off the kernel source which became necessary for me to get the Nvidia driver installed on kernel 5.8.+ which may be something you could pull into you main version as well.

@meberlein Thanks, I'm going to look into it.

Vega reset patch is now obsolete. Check out https://github.com/gnif/vendor-reset

@meberlein Do you really need the kernel source for that? Shouldn't that be covered by the kernel headers (which already get installed along the kernel)?

Why the fsck the script deletes the whole temporary environment? I've selected to not install the kernel packages right away, the script happily patched*, compiled, build the packages, and equally happily deleted the whole environment, along with those packages.

* I had to amend the 5.6 patch to work on 5.8, by deleting the documentation patch, as a dirty workaround.

Yeah, that was kind of an oversight on my side. I'm going to change this behaviour next time I update the script.

@meberlein Do you really need the kernel source for that? Shouldn't that be covered by the kernel headers (which already get installed along the kernel)?

My apologies you are absolutely correct. I tested again with kernel 5.9.14 and the new NVIDIA package that supports 5.9. Pointing to the header location worked as well. Not sure why the nvidia run package didn't find them at their default location but either way it works.

will it work with kernel 5.13.1 .?

I tried with 5.13.1 ND got FAILED TO APPLY ACS

I tried with 5.7.6 bcz it was suppose to work with..but now I'm getting
make[1]: *** [scripts/Makefile.package:83: bindeb-pkg] Error 3
make: *** [Makefile:1463: bindeb-pkg] Error 2

@Alexitachi The only thing I can tell you is that I'm still using the newest available ACS patch from https://gitlab.com/Queuecumber/linux-acs-override/-/tree/master/workspaces for this script.

Edit: Oh wow, I actually don't! Sorry, I will fix this as soon as I find time, probably tomorrow.
Edit2: Nevermind that new patch is identical to the old one.

thanx..prob solved.

thanx..prob solved.

How did you solve it?
For me the ACS patch is broken since 5.12.10 on Fedora Server 33.

Best regards, Stefan

Okay, so I updated the script to use the newest ACS override patch. (Sorry it took me so long!)
I didn't have any time testing it so far, so .. here be dragons. Please let me know if it works for you.

Edit: Newer kernels (5.11+? 5.12.13+) apparently do not work with the newest ACSO patch. Hopefully Queuecumber will release an update soon.

Edit2: https://gitlab.com/Queuecumber/linux-acs-override/-/issues/12
There won't be any updates to the linux-acs-override repository anymore.

Update: I released a modified patch for all current kernels (5.12.13 to 5.13-rc4). All patches can be found in my new repository (https://github.com/mdPlusPlus/linux-acs-override). Eventually this script will probably move to this repository, too.

For some reason there's currently no kernel-package for current Ubuntu or Debian releases. I'm not quite sure what to make of it yet, but there's probably a new way to compile kernels on those platforms. As soon as I've figured out what to replace kernel-package with, I'm going to update the script.
This script isn't even using kernel-package anymore, my bad. Something is still off.

Update: I released a modified patch for all current kernels (5.12.13 to 5.13-rc4). All patches can be found in my new repository (https://github.com/mdPlusPlus/linux-acs-override). Eventually this script will probably move to this repository, too.

Thank you for updating the patch. It works great with my docker based fedora ACS kernel build: https://hub.docker.com/r/stefanlehmann/acs_fedora

I think there is a typo for kernels 5.12.13+, it downloads the 5_12_13 patch but then tries to apply the 5.12.6+ patch and errors.

@meberlein You're right! I should really replace that whole construct with something that doesn't need manual attention every now and then...

Edit: Fixed.

This might help someone - https://github.com/TrickBit/acso-patchmaker

How can I use this script for 5.13.0-21-generic? Is there a workaround?

@mousemat86: I had 100% success rate (mind you 3 out of 3) when I've removed the doc part of the patch. But then I comment out half of the script and change the logic of other half (don't clean, don't download the patch if it's there, skip questions, etc.).