How to apply ACS Override patch (Kubuntu 18.10 & Kernel 4.18.16)

elixir77 · November 13, 2018, 3:28am

Update…got my replacement motherboard. Asrock Z97X Killer. Hoped no ACS patching needed but was wrong.
Anyway, I download the acso patch then manually recompiled the kernel following GaryBoltWolf’s old post here

Play games in Windows on Linux! PCI passthrough quick guide Linux

Hello all! I am Gray from GrayWolfTech. I make videos on Linux and other interesting technology. Wendell has given me permission to post my written guides here for my videos. This is great for two reasons: First it helps grow this community and second my videos reach a wider audience to share what I have learned. I look forward to posting all my guides and videos here, and I am more than happy to answer any questions about the guide you may have. – Onward! – Now it’s time for one of the coolest and more advanced capabilities of Linux. KVM, or kernel virtual machines. We are going to go through step by step, how to setup PCI pass-through to a Windows virtual machine on a Debian host to play games! Thanks to Redhat, KVM can run virtual machines with almost bare metal performance and supports a wide variety of other neat features. The one we are going to focus on in this video is of course, PCI pass-through. The process of allowing a virtual machine full access to a PCI express graphics card for gaming, CAD, or 3D rendering. With this neat capability, you can run Linux as your host OS, and then pass your GPU (or one of your GPUs if you have multiple) to a virtual machine to play games. Let’s go over the requirements for this project: First and most important, you should backup any data you have on your PC. If you know what you are doing then you will not lose anything, but accidentally selecting the wrong drive when installing can lead you to be very sad when you figure out the drive you wiped had all your really good porn on it. Second, this process will take time. For someone who is an experienced Linux user it should take about 20 minutes (not counting time to install Debian or recompile the kernel). For someone who is new it might take longer. Make sure you allow yourself an entire afternoon or a good chunk of 4-5 hours where you could potentially not have a working PC. Third, follow the instructions I lay out in the video. I will answer questions down belo…

I found a script on github someone had written to apply the patch and update the kernel it worked but I forgot to set the downstream so didn’t think it worked even though it did. You can find the script here

gist.github.com

https://gist.github.com/mdPlusPlus/031ec2dac2295c9aaf1fc0b0e808e21a

compile_newest_stable_kernel_with_acso_patch.sh

#!/bin/bash

function install_dependencies() {
	echo "Installing dependencies..."
	sudo apt -qq update
	sudo apt -qq install curl git wget
	
	## Apparently this does not satisfy all package requirements
	#sudo apt -qq build-dep linux-image-generic
	sudo apt -qq install build-essential kernel-package fakeroot libncurses5-dev libssl-dev ccache

This file has been truncated. show original

Anyway I manually applied recompiled the kernel on 4.15.18 because I was having one of those forgetful moments. From comments on the github, it seems the issue I was having is a common one with the acso pre-compiled kernels. Using the script or manually compiling yourself fixes this driver issue.

My other issue with the AMD gpu always being made to primary GPU seems to be both motherboard and kernel settings related. I think I had passed the nvida card to vfio initially but didn’t change all the settings back. Then of course the kernel would boot the AMDGPU driver before the vfio

Anyway, figured that out when after getting the new motherboard and reinstalling everything. I had to force amdgpu to stop loading before vfio following wendell’s post here

Ubuntu 17.04 -- VFIO PCIe Passthrough & Kernel Update (4.14-rc1) Linux

DRAFT of the article for ubuntu passthrough setup from the live stream. Images are missing for right now. Any comments? A video is being edited that goes through the how-to step by step. Step 1 install ubuntu step 2 install ukuu sudo apt-add-repository -y ppa:teejee2008/ppa sudo apt-get update sudo apt-get install ukuu Use ukuu to install the latest kernel. In our case we want Kernel 4.14-rc1 because that is the latest kernel as of the time of this writing and this kernel is known to work on this hardware configuration, even though it is a pre-release kernel. This kernel, or later, is also important for AMD Ryzen or Threadripper users as it contains a number of updates for those platforms. The update utility will often fail the first time due to the cache folders not being created automatically. Just run it again and it will work the second time. Notice that as it updates the kernel, it also automatically runs update-grub and update-initramfs and that it complains about missing microcode. It isn’t clear if the microcode is required, but the microcode is non-free. It can be found on the internet, however. We must also add some kernel parameters and re-run the update commands above, but that can be done later. step 3 (optional, skip) find microcode and copy to /var/lib/firmware step 4 (doing the vfio stuff) We are ready to setup a virtual machine and pass through real graphics hardware to the virtual machine. To start, we need to make sure the host platform has been configured correctly: That hardware virtualization extensions are enabled, and that the IOMMU groupings are suitable. First, make sure that vt-d (or SVM on the amd platform) is enabled in the UEFI. This varies from platform to platform but typically Level1 Techs motherboard review cover where these options are and what the IOMMU groupings are for particular motherboards. Most Linux distros do not enable IOMMU by default. You will need to update your grub bootloader config to support IOMMU. F…

Now to figure out how to get the Vega 64 to stop the issue it has shutting down when you rebooting or power off the VM, so I don’t have to keep rebooting the entire system or leave the VM permanently on once booted