Serial console does not connect on new 2vcpu Dsv5 machine type

[hofmannma]

I create a debian 11 test vm from portal with a traditional v3 machine type (s, 2 vcpu, 8gb).
Serial console access works out of the box.
I create the same procedure (same VNET, same boot diag storage account ) a test vm with Dsv5 machine type and serial console tries to connect until it times out.

[bj00rn]

I am experiencing the same issue on D16ds_v5 running Ubuntu 18.04. Resized from D8s_v3 and now the serial console has stopped working.

Sorry, the serial console was unable to connect to the VM because the service did not respond in a timely manner. Please retry your connection. If this issue persists please visit <https://aka.ms/serialconsolehelp>.
To reconnect, press "Enter".

Size: Standard D16ds v5 (16 vcpus, 64 GiB memory)

$ uname -a
Linux PROD-APP01 5.4.0-1063-azure #66~18.04.1-Ubuntu SMP Thu Oct 21 09:59:28 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.6 LTS"

[bj00rn]

#93

[bj00rn]

#96