4
votes
Accepted
`libvirtd` crashes the system
It turns out I misunderstood the guide. In there, it says to select /dev/sdb (which is what I have), not /dev/sdb2 (which is what I thought, I only wanted that partition). There's a similar problem ...
4
votes
Accepted
lsusb lists devices on different PCI controllers under the same USB hub
USB 3.0 in 5G mode isn't compatible to USB 2.0 or earlier, so the way they implemented compatibility is to use one pin pair in the same position as for USB 2.0 for legacy devices, and two new pin ...
- 33.4k
3
votes
Passing a USB device to Qemu KVM
If using a graphical front-end is okay for you, virt-manager's USB-passthrough works.
In the info section click add Hardware and select USB Host Device.
I use it to pass pen drives to Windows 10 ...
- 31
3
votes
Passing a USB device to Qemu KVM
just thought I'd put my two cents in. I was trying to add a usb printer to my VM and tried the whole "qemu-kvm" command route to no avail. I eventually just manually added the xml entry ...
- 31
2
votes
Accepted
virsh preboot script
You can use a libvirt hook to run arbitrary programs when a VM or network is started or stopped.
For instance, you can create a file /etc/libvirt/hooks/qemu which determines if your VM is being ...
- 9,088
2
votes
Too few IOMMU groups - split?
Well, it seems to be a very complicated question. It was a really hard nut. First I suspected the OS, because I installed Debian testing (Bullseye), what is somewhat more dangerous than stable version....
- 1,450
2
votes
Accepted
VT-d support enabled but IOMMU groups are missing
You need to add intel_iommu=on to kernel load parameters. By default this parameter is disabled (I don't know distro which set this parameter to on by default).
When you've enabled IOMMU in BIOS, then ...
- 4,410
2
votes
difference betweeen passthrough NIC and bridge setup in qemu
A pass-through NIC setup means as if the hardware would be itself connected to the machine instead of being connected to the host machine. Likewise, it will also mean you have to setup the hw and ...
- 58k
1
vote
PCI Passthrough via OVMF; No Video Output
It was an easy fix, I just had to add video=efifb:off to the grub config.
- 33
1
vote
Passing a USB device to Qemu KVM
I'm new to this platform, so forgive my formatting.
As indicated before it all starts with
lsusb
Get the bus and device numbers, in your case 1 and 18.
Then, make a jetflash.xml file containing:
<...
- 11
1
vote
Accepted
Monitor plugged into integrated graphics but use dedicated graphics for rendering games
After doing some research it seems that PRIME is what I was looking for.
https://wiki.archlinux.org/index.php/PRIME
It allows the GPU to be inactive when a non GPU intensive program is running but ...
- 31
1
vote
Passthrough Sonnet USB-C card to Windows guest via KVM and vfio
I know I am a bit late to the party but I hope the following can help people on google quests facing similar issues.
Please note I have only tested this on discrete USB controllers.
xhci_hcd is indeed ...
- 21
1
vote
Accepted
How do I translate between qemu-system arguments and virt-install arguments so I can unify partially working commands?
I believe you are looking for the --hostdev option to virt-install. It can take a PCI bus location and other flags. The full list is show with:
virt-install --hostdev=?
The options needed for above ...
- 12.4k
1
vote
lsusb lists devices on different PCI controllers under the same USB hub
The xHCI controller has actually two buses in one. The superspeed bus:
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
... and the traditional USB2 one:
/: Bus 03.Port 1: Dev 1, ...
- 114k
1
vote
Can a KVM guest VM's kernel be more recent than its host? (When hardware passthrough is in effect)
If you passtrough some hardware to a guest system the host has no way of accessing it, in fact you need to blacklist nouveau/nvidia to make sure that the vfio driver can expose it to the VM.
Yes the ...
- 193
1
vote
VFIO cannot be used for the Memory Controller
The answer seems to be: of course I cannot pass the Memory Controller to the VM. And since the Audio Card is in the same IOMMU group as the Memory Controller, I will not be able to pass it to the VM.
- 514
Only top scored, non community-wiki answers of a minimum length are eligible