Proxmox not working without monitor

[pxu33]

Hello there
Has motherboard with realnek network card and pci-e.

I installed proxmox using gui and my graphics card. Now - when i disable my monitor (gpu is still installed in motherboard, just without any output) - it does not access from my local network. i do not know why. Journalctl is OK

First thing - pci have different name, but i manually create config for my network card and it working with connected monitor again, when is disconnect it - problem occur

#/etc/systemd/network/10-realtek.link
[Match]
MACAddress=0a:e0:af:f1:06:b8

[Link]
Name=realtek0

Mac adress is correct

#/etc/network/interfaces
auto lo
iface lo inet loopback

auto realtek0
iface realtek0 inet manual
        post-up /usr/sbin/ethtool -s realtek0 wol g

auto vmbr0
iface vmbr0 inet static
        address 192.168.1.100/24
        gateway 192.168.1.1
        bridge-ports realtek0
        bridge-stp off
        bridge-fd 0

Attach journalctl when monidor is disconnected, but gpu is installed

Thanks for help

 

[pxu33]

When i uninstall monitor on booted system - proxmox still working fine
When i installed monitor on booted system (with uninstalled monitor) - black screen with "no signal"

 

[pxu33]

Forgot to say:
With uninstalled gpu card - all working fine, but its not my case, i need always installed gpu inside motherboard

 

[cwt]

If your system doesn’t boot „headless“ you could try one of these cheap HDMI/DP dummy plugs.

 

[zzz09700]

Cwt is right. This looks like a BIOS/GPU POST issue and the easiest way to bypass this problem is to have a HDMI dummy plug.

 

[pxu33]

If your system doesn’t boot „headless“ you could try one of these cheap HDMI/DP dummy plugs.

thanks for your answers, but whats about journalctl of booting without monitor? i do not see any errors

 

[sukeshak]

I just got this today and it solved the problem.
HDMI Dummy plug. You can get other variants as well.

Verify on the console

sudo lshw -C display