[SOLVED] few issues with proxmox 7 installation from a newbie

[Blackdir]

hello everyone,
I'm new to proxmox but I had some sysadmin previous experience in Linux.
I installed Proxmox 7 on an old server (x99 MB with Xeon) and configured properly ZFS and SSD + HDD storage
I installed Win 10 VM with VirtIO drivers & agent and everything is running fine.
I have 2 issues/questions:

A - In my system I added 2 GPU (doesn't have the integrated one) and I'd like to dedicate one to the win 10 VM.
I configured properly the GPU passthrough (following the guide https://www.reddit.com/r/homelab/comments/b5xpua/the_ultimate_beginners_guide_to_gpu_passthrough/) and I believe that everything is working fine because the AMD drivers on win 10 recognize properly the video card. NoVNC is disabled and I can enter in windows via remote desktop
My only problem is that from the HDMI cable connected to that videocard I don't get anything (only the linux booting messages and once the system is up and I run the VM, I don't get anything). Is there something specific I can do to fix this?

B - I want to add a quadethernet card on this server but when I plug it in and start the server (which is congigured to use the onboard ethernet card) it is not reachable anymore nor via the onboard ethernet card nor via any of the 4 ethernet ports... if I take out the quadethernet card the server is reachable again... any suggestion on how to fix this?

thank you in advance for any hint you can give me

enjoy the last day of the year (for the ones in my time zone) or the first one of the year (for the rest of you)

blackdir

 

[Blackdir]

Few additional details:

A - the quad ethernet PCIe card is made by an unknown company called Kalea-Informatique having 4 separate REALTEK RTL8111E chipsets (same controller in the MB for the onboard ethernet)
B - the GPU I want't to passthrough is a Radeon RX 550, while the other is a Nvidia GT 710

Are there any log I can look into or post here that might help to debug the two issues?

 

[leesteken]

Adding PCI(e) devices can cause other PCI(e) devices (some of which are part of the motherboard) to increase their PCI-ID. Modern Linux distributions, such as Proxmox (based on Debian), use the PCI-ID of the network device to give it a name. This name is used in the /etc/network/interfaces configuration file. If the PCI-ID has changed, then the name of the network interface has changed and you need to make the same change in the configuration file.

 

[RokModTwo]

With the quad-card plugged in, and you are at the shell/console, if you do a ip a command to see what interfaces it lists... this can give you an idea of what are now active. Per avw's tip - you can then manually revise the /etc/network/interfaces file.

I recently had a similar issue when the upgrade to 7.x with debian 11 renamed the existing cards on me (we had both on-board and extra cards like you did). The ip a was helpful to see which interface actually had the network cable still plugged in.

I edited the /etc/network/interfaces file, then ifdown vmbr1, and a ifdown <<interface>> for each interface, then bring the interface up via ifup <<interface>> and then ifup vmbr1 If all goes well then your original IP should ping, and then once you're back in the web GUI, Node > Network should list the original + new 4 interfaces + vmbr1 default bridge.

 

[Blackdir]

Thanks @avw and @RokModTwo I solved the quadethernet issue by editing the /etc/network/interfaces
As per the GPU it was a bug on the GUI passingthrough the exact address... ifact by looking in the config file, I realized that the passed address was not getting the proper address if passed via the GUI (it was missing a .1)... once I manually corrected the address the GPU is now passed properly