Proxmox VE 8 and add serial port to VM, - console problem

[Berger]

When I create a Linux VM on Proxmox VE 8, for example debian 12 and then add the serial port to the VM with the command

qm set 101 -serial1 /dev/ttyS0

everything went fine and the serial port is added and working.
The problem occurs when I want to connect to the VM using the Console button.
This will end up with error 1006 unable to find serial interface
if I use the console item in the VM menu everything is OK.
The serial port is not supposed to be used for connecting the terminal at all, so console communication should not be directed to it.

Where is the problem and how to solve it?

Thanks

 

[aaron]

You attached the ttyS0 of the host to the VM.

If you want to make use of a serial connection for the console, add a serial device of the type socket and then make sure that the display is set to "Serial Terminal X" where X matches the ID of the serialX device in the config.

 

[Berger]

I want to have a serial port available in the VM for connecting a measuring device, not for console communication.
I added the serial port with the command

qm set 101 -serial1 /dev/ttyS0

I see it in hardware : Serial port (serial 1) //dev/ttyS0

However, when I press the Console button, it tries to establish communication through the serial port
The console in the menu works correctly



Deleted the VM, created a new one and the same result, as soon as I add a serial port to the VM, the button-launched console redirects to the serial port even though the serial port is not pointing to a socket

 

[aaron]

aah okay. You run into a bug because we don't check closely enough how the serial port is configured. You could override the default console in Datacenter -> Options -> Console viewer, to HTML5 (noVNC) until we have a new version out there that checks better how the serial port for the VM is configured.

 

[rudydevolder]

It took a while before I figured out that when you use:

qm set 101 -serial1 /dev/ttyS0
=> than you ALSO need to set inside the ProxMox-VM hardware section display to serial1 instead of default or VGA or any other video card.

But as an alternative you can also do:
qm set 101 -serial0 socket

With solution 2 you can still go via the videoadapter at the same time and have a UI.