PSA Archives - The Passthrough POST https://passthroughpo.st/category/psa/ Your baremetal source for virtual news Tue, 03 Nov 2020 00:30:12 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.4 140179014 PSA: Issues Persist into Kernel 5.2 — Patches Landing in 5.3 https://passthroughpo.st/psa-issues-persist-into-kernel-5-2-patches-landing-in-5-3/ https://passthroughpo.st/psa-issues-persist-into-kernel-5-2-patches-landing-in-5-3/#disqus_thread Thu, 25 Jul 2019 17:57:54 +0000 https://passthroughpo.st/?p=2882 As previously reported, many users were having issues with VFIO on the 5.1 kernel series, and those issues have persisted or worsened in kernel 5.2. Users report outright crashes and VMs refusing to boot, usually accompanied by KMODE_EXPECTION_NOT_HANDLED errors. Consider supporting us if you value independent tech news and research. This site will always be [...]

The post PSA: Issues Persist into Kernel 5.2 — Patches Landing in 5.3 appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/psa-issues-persist-into-kernel-5-2-patches-landing-in-5-3/feed/ 1 2882
Finding a Safe Mac OS GPU for VMs https://passthroughpo.st/finding-a-safe-mac-os-gpu-for-vms/ https://passthroughpo.st/finding-a-safe-mac-os-gpu-for-vms/#disqus_thread Fri, 19 Jul 2019 18:43:07 +0000 https://passthroughpo.st/?p=2833 One of the most common questions we get is: "what gpu should I use for a Mac OS VM," and it's frankly a hard one to answer. Nvidia is essentially out of the question at this point, assuming you want to use a new release of their operating system, and new AMD cards don't work [...]

The post Finding a Safe Mac OS GPU for VMs appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/finding-a-safe-mac-os-gpu-for-vms/feed/ 2 2833
HOWTO: Patch Fedora Kernel (feat. AGESA 0.0.7.2+ Fix) https://passthroughpo.st/agesa_fix_fedora/ https://passthroughpo.st/agesa_fix_fedora/#disqus_thread Sun, 30 Jun 2019 17:14:22 +0000 https://passthroughpo.st/?p=2648 There are many reasons you might want to patch your kernel. You might need extra security patches. Maybe you need the ACS Override patch to use VFIO, or you have an AMD board with a broken UEFI that you can't downgrade. Consider supporting us if you value independent tech news and research. This site will [...]

The post HOWTO: Patch Fedora Kernel (feat. AGESA 0.0.7.2+ Fix) appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/agesa_fix_fedora/feed/ 0 2648
PSA: 5.1 Kernel — Glitching and Crashes in Passthrough https://passthroughpo.st/psa-5-1-kernel-glitching-and-crashes-in-passthrough/ https://passthroughpo.st/psa-5-1-kernel-glitching-and-crashes-in-passthrough/#disqus_thread Thu, 27 Jun 2019 15:18:56 +0000 https://passthroughpo.st/?p=2573 At some point early in the 5.1 branch Linux kernel development cycle, a bug was introduced that caused crashing and graphical glitching in some passthrough systems. No workarounds are currently known without reverting to 5.0 or an LTS kernel branch. Tracking down the bad 5.1 Kernel Commit Consider supporting us if you value independent tech [...]

The post PSA: 5.1 Kernel — Glitching and Crashes in Passthrough appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/psa-5-1-kernel-glitching-and-crashes-in-passthrough/feed/ 0 2573
An Open Letter to Linus Tech Tips (and a PSA) https://passthroughpo.st/an-open-letter-to-linus-tech-tips-and-a-psa/ https://passthroughpo.st/an-open-letter-to-linus-tech-tips-and-a-psa/#disqus_thread Fri, 26 Apr 2019 08:27:36 +0000 https://passthroughpo.st/?p=2086 I’d like to start by saying that we appreciate that Linus Tech Tips saw fit to cover (and cite) our work. We appreciate the exposure their recent video gave VFIO and OS X Virtualization, too. We consider any way we can get people involved with our (admittedly niche) community of tech enthusiasts a net positive. [...]

The post An Open Letter to Linus Tech Tips (and a PSA) appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/an-open-letter-to-linus-tech-tips-and-a-psa/feed/ 0 2086
Explaining CSM, efifb=off, and Setting the Boot GPU Manually https://passthroughpo.st/explaining-csm-efifboff-setting-boot-gpu-manually/ https://passthroughpo.st/explaining-csm-efifboff-setting-boot-gpu-manually/#disqus_thread Sun, 04 Feb 2018 21:42:36 +0000 https://passthroughpo.st/?p=1558 Many factors can influence the success of GPU Passthrough. On some newer systems, notably low and mid-end Ryzen platforms, there's a little extra legwork you'll need to do to get your OS to boot with the correct GPU, and the processes that go into making that happen are somewhat complicated. Need help Building your passthrough [...]

The post Explaining CSM, efifb=off, and Setting the Boot GPU Manually appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/explaining-csm-efifboff-setting-boot-gpu-manually/feed/ 3 1558
Arch Linux Broke OVMF Passthrough, Here’s How to Fix it https://passthroughpo.st/arch-linux-broke-ovmf-passthrough-heres-fix/ https://passthroughpo.st/arch-linux-broke-ovmf-passthrough-heres-fix/#disqus_thread Tue, 30 Jan 2018 21:47:40 +0000 https://passthroughpo.st/?p=1437 If you use Arch Linux and OVMF, you may have noticed that a recent update broke compatibility with your passthrough VM(s.) Luckily, we're here to explain why this happened, and (hopefully) how to fix it. While many guides online haven't been tweaked yet to represent the change, this update presents a serious problem. The default [...]

The post Arch Linux Broke OVMF Passthrough, Here’s How to Fix it appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/arch-linux-broke-ovmf-passthrough-heres-fix/feed/ 0 1437
Fix for Threadripper PCI Passthrough Submitted to Linux Kernel https://passthroughpo.st/fix-threadripper-pci-passthrough-submitted-linux-kernel/ https://passthroughpo.st/fix-threadripper-pci-passthrough-submitted-linux-kernel/#disqus_thread Sat, 27 Jan 2018 23:15:30 +0000 https://passthroughpo.st/?p=1461 AMD's Threadripper platform has proven buggy and problematic for Passthrough VMs. Luckily, Geoffrey McRae, known by his username gnif, recently submitted a fix to the Linux kernel developers for the company's HEDT flagship. When the patch lands downstream, TR will be uniquely poised as a powerful virtualization platform, as the highest-end Threadripper currently available sports [...]

The post Fix for Threadripper PCI Passthrough Submitted to Linux Kernel appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/fix-threadripper-pci-passthrough-submitted-linux-kernel/feed/ 1 1461
Explainer – Why and When Modprobe and VFIO-PCI Is Needed https://passthroughpo.st/explainer-modprobe-vfio-pci-needed/ https://passthroughpo.st/explainer-modprobe-vfio-pci-needed/#disqus_thread Sun, 14 Jan 2018 16:06:56 +0000 https://passthroughpo.st/?p=1294 For quite some time now various guides on the internet have told us to use modprobe rules on most devices when doing PCI and VGA(GPU) pass-through. While in most use cases you will need to pre-bind your device to vfio-pci, or blacklist the kernel module beforehand, due to libvirt not wanting to dynamically re-bind with [...]

The post Explainer – Why and When Modprobe and VFIO-PCI Is Needed appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/explainer-modprobe-vfio-pci-needed/feed/ 0 1294
Essential Kernel Update for AMD VFIO Users https://passthroughpo.st/essential-kernel-update-for-amd-vfio-users/ https://passthroughpo.st/essential-kernel-update-for-amd-vfio-users/#disqus_thread Tue, 12 Dec 2017 18:49:20 +0000 http://passthroughpo.st/?p=370 If you own, or want to own, an AMD processor and use virtualization with GPU Pass-through you might already know about the NPT bug. Nested Page Tables is a feature that is enabled by default with virtualization in KVM. The aim is for better performance over an emulated page table. Read also: Binding a GPU [...]

The post Essential Kernel Update for AMD VFIO Users appeared first on The Passthrough POST.

]]>
https://passthroughpo.st/essential-kernel-update-for-amd-vfio-users/feed/ 0 370