fedora-acs-override
LookingGlass
fedora-acs-override | LookingGlass | |
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4 | 24 | |
42 | 4,501 | |
- | - | |
7.3 | 9.5 | |
12 days ago | 24 days ago | |
Shell | C | |
MIT License | GNU General Public License v3.0 only |
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fedora-acs-override
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VirGL
- Code + RPMs - https://github.com/some-natalie/fedora-acs-override
As far as concerns around stability with ACS override, I tend to only enable the override for the specific GPU (or other hardware) that I'm passing through and haven't encountered any stability problems or memory leaks that'd interrupt desktop or light server usage. I also used to run this for a bunch of white-box GPU hardware for a customer at a former job and it worked well for exploratory AI/ML workloads before investing in the big Nvidia DGX boxes. YMMV, of course!
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Best way to enable ACS override patch for fedora? (COPR for Xanmod vs Liqorix)
Unfortunately the only ACS copr I see is months old and not up-to-date. I also found a Github repo but that seems to be only for Intel CPUs so I can't use it.
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1 iGPU, 2 dGPUs, 2 accelerated VMs (Windows, MacOS) - need help deciding the best path forward for IOMMU
Unvetted, random searching: https://github.com/some-natalie/fedora-acs-override/blob/main/README.md
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VM doesn't start with ACS override patch
I'm on Fedora 35 using the kernel from some-natalie/fedora-acs-override with these kernel parameters:
LookingGlass
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VirGL
Unfortunately AMD cards suffer from a reset bug, still.
The reset bug being that you can pass through the card fine, once. But if you try to pass it through again (or the card experiences an issue and needs to reset), they get caught in some kind of bad state and won’t work until power is removed and restored. Which requires a reboot or a only slightly less disruptive dance with system power states.
For vega and 5000 series gpu’s, there’s https://github.com/gnif/vendor-reset
Incidentally, nvidia gpus are so good at resetting, they’ve probably done so without you noticing. If the screen ever goes black for a fraction of a second and returns in normal usage, it was probably because it reset itself.
The lower 6000 series lower than the 6800’s for example may or may not have the issue. It seems most “reference” cards are fine, but custom vendor cards often but not always have issues. My reference 6700 works fine, but a sapphire 6700 probably won’t.
And the 7000 series is also fucky in a new way somehow. Gnif knows far more about this than me, and has basically thrown up his hands at how AMD doesn’t care. He’s made occasional posts about it on https://forum.level1techs.com/
Gnif is also responsible for Looking glass: https://github.com/gnif/LookingGlass
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Virtual Machine stinkyness
You could try LookingGlass. That may require two GPUs.
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scrcpy 2.0 is released, with audio support!
It's a pair of apps, one runs on a Windows virtual machine, the other on the host OS, that uses shared memory to copy a passed-through GPUs frame buffer. Runs fast enough to get 4k/120fps very low latency, so if you have a spare GPU you can game on it in Windows, from a Linux desktop. https://github.com/gnif/LookingGlass
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Can you make a passed through GPU display to a emulated display in virt-manager?
Check out https://github.com/gnif/LookingGlass if you can accept a separate window.
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looking glass doesn't detect my mouse
then everything looks normal. It's all up to EGL though, as looking-glass really doesn't have any code that handles image scaling (see here).
- Looking glass B6 released!
- AMD RX580 passthrough with looking glass doesn't work
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The Death of the PCIe Expansion Card
https://github.com/Arc-Compute/LibVF.IO/tree/master/ plus https://github.com/gnif/LookingGlass works pretty well. If you use an Intel GPU, particularly one of their new Arc dedicated GPUs, it supports the functionality on the consumer grade hardware without any trickery and you just need Looking Glass to map the outputs.
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Passing audio from 1 VM to another for final mixing?
I'd like to introduce you to Looking Glass as a much higher quality and lower latency alternative to NDI when you are trying to relay frames between virtual machines within the same computer. With a patched nvidia driver to enable nvfbc on the gaming VM there is almost zero performance penalty when capturing gameplay. It also has options for audio, which I don't use because they didn't exist when I was configuring my system. I have a similar use case (gaming and streaming) and hardware (5950X + two gpus). I am not using proxmox, however. My configuration using QEMU and libvirt has this XML:
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Looking Glass Beta 5 Released!
What stopping from tagging a stable release? The milestone has no open issues.
What are some alternatives?
vgpu-proxmox
OSX-KVM - Run macOS on QEMU/KVM. With OpenCore + Monterey + Ventura + Sonoma support now! Only commercial (paid) support is available now to avoid spammy issues. No Mac system is required.
vendor-reset - Linux kernel vendor specific hardware reset module for sequences that are too complex/complicated to land in pci_quirks.c
kvm-guest-drivers-windows - Windows paravirtualized drivers for QEMU\KVM
barrier - Open-source KVM software
Magpie - An all-purpose window upscaler for Windows 10/11.
QtScrcpy - Android real-time display control software
sndcpy - Android audio forwarding (scrcpy, but for audio)
AixCrypt - A Key Calculation Based Program For Data Confidentiality Over A Steganography-Like Technique Using The ROT Algorithm
nyxt - Nyxt - the hacker's browser.
anki - Anki's shared backend and web components, and the Qt frontend