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  1. K

    [TUTORIAL] Using mDNS inside VMs in SDN subnets

    Hello, I am a home user that just likes to play around with tech and like Proxmox a lot. I recently created an SDN and moved my VMs into it and everything works great, but I had an issue with a printer/scanner that was not getting "discovered automatically". The reason for this is that mDNS...
  2. K

    [SOLVED] Ubuntu 24.04-2 template not picking up default gateway

    Apologies for the really basic question, but after setting up an LXC using ubuntu-24.04-2 template I have noticed that it is not picking up the default gateway. The only change to defaults was basically choosing DHCP instead of static for IPv4. I noticed proxmox seems to know how the distro...
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    [SOLVED] Isolate USB controller on 8845HS

    Hello, I have a system with Ryzen 8845HS and the following IOMMU groups: ...
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    Update with "switch network configuration from network-scripts to NetworkManager"

    There is an update to the pve-container package reading: pve-container (6.0.13) trixie; urgency=medium * setup: switch network configuration from network-scripts to NetworkManager for RHEL 10 and derivatives like CentOS Stream, AlmaLinux and Rocky Linux. -- Proxmox Support Team...
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    [SOLVED] The serial number can't be longer than 20 characters

    Hello, After a recent update, I am no longer to start a VM. I get this error: root@lab:~# qm start 9003 kvm: -device scsi-hd,bus=virtioscsi1.0,channel=0,scsi-id=0,lun=1,drive=drive-scsi1,id=scsi1,serial=WDC_WDxxxxxxxx-xxxxxxxxxxxxxxxx: The serial number can't be longer than 20 characters when...
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    Why is one-to-many USB device attachment possible?

    I have 2 VMs in my Proxmox: one has GPU passthrough for my main Linux desktop. The other is a Windows VM which I use for work (accessing my employer). I generally remote-desktop from Linux into the Windows VM with Remmina (it works great because it's basically a "localhost" connection) during...
  7. K

    Migrate VM to laptop with QEMU/KVM

    Hello, I am a hobbyist using Proxmox on my main system. My desktop is a VM with GPU passthrough. I also have other VMs and one of them is a small (ram/disk) Windows 11 machine. I need to transfer this machine to my laptop which runs Fedora and only has VirtManager. To that end, I followed...
  8. K

    I/O performance for heavy workload

    Hello, I use Proxmox to host a VM that I use for general purpose desktop (with GPU passthrough). I've noticed that my system becomes unresponsive (I would describe it as high latency in reacting to my input, similar to memory thrashing due to swap usage) during periods of high disk I/O. For...
  9. K

    Kernel Crash in amdgpu driver when using MST

    Hello, I have a Dell UltraSharp U4025QW monitor which has a feature that causes the kernel to crash: the iMST (internal Multi-stream Transport). This iMST allows you to use the "daisy chain" DisplayPort feature and connect two separate monitors to the same port. In this particular model, there...
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    Can I use one of two GPUs for passthrough and the other for VirGL?

    Hello, I have two Radeon GPUs on my system: one 6700XT and one 6800. I have been using both with passthrough for a dual-seat configuration. I now want to be able to use VirGL with one of the two. As I understand it, in order to do this the host must load the amdgpu drivers. I have tried...
  11. K

    Attach Brio USB Webcam to Linux VM

    Hello, I use Proxmox to run my main desktop. I run EndeavourOS (Arch-based) Linux on my main VM which has an RX6800 via PCI passthrough. It also has a USB mouse and keyboard that are attached to the VM. Recently I got a Logitech Brio with USB signature 046d:085e and I cannot get it to work...
  12. K

    VirtIO-GPU resolutions

    Hello, I run an Arch Linux VM using a VirtIO-GPU adapter. I connect to it mostly through RDP (I use Gnome's screen sharing) but also with the windows virt-viewer client. My problem is that I have a 27" monitor at 21:9 ratio and I want to run it at 2560x1440 resolution, yet that is not...
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    Kernel 5.15.64 breaks my VMs

    Hello all, I updated from 5.15.53-1-pve to 5.15.64-1-pve and my VMs have stopped working. When starting they UI simply prints an error that "Error: unable to read tail (got 0 bytes)". In /var/log/daemon.log I see: Nov 14 21:30:25 pve pve-guests[7004]: start VM 101...
  14. K

    vfio_bar_restore: reset recovery - restoring BARs

    Hello everyone, I am trying to pass through a 6700XT properly. Currently I am stuck in the following state: Proxmox boots and I can start a VM using the GPU I can use the GPU in the VM quite stable (run BasemarkGPU, Unigine Heaven, Steam games) After shutting down the VM I can no longer...
  15. K

    Why do bind mounts prevent snapshots?

    Hello, I'm new to proxmox. Today I tried to take my first snapshot of an unprivileged container. Instead I found the button disabled and the message "The current guest configuration does not support taking new snapshots". After reading up in these forums, I saw references to this storage...