It's probably not related to the ARM support but the first time when I try to establish the connection, it fails to parse port from the server log. I saw the same thing when I create a new VM and connect to it.
Install and start server if needed
> Installing to /home/pi/.vscode-server-insiders/bin/e80dd4f217db6e230d311a87fdf4276f740f6445...
> Downloading with wget
> vscode-se 0%[ ] 0 --.-KB/s
> vscode-ser 0%[ ] 55.54K 175KB/s
> vscode-serv 0%[ ] 199.54K 317KB/s
> vscode-serve 1%[ ] 471.54K 504KB/s
> vscode-server 3%[ ] 799.53K 693KB/s
> vscode-server- 5%[> ] 1.33M 979KB/s
> vscode-server-l 9%[> ] 2.32M 1.45MB/s
> vscode-server-li 12%[=> ] 3.12M 1.73MB/s vscode-server-lin 17%[==> ] 4.26M 2.11MB/s
> vscode-server-linu 19%[==> ] 4.58M 1.70MB/s
> vscode-server-linux 23%[===> ] 5.57M 1.93MB/s
> scode-server-linux- 26%[====> ] 6.29M 2.03MB/s eta 9s
> code-server-linux-a 29%[====> ] 7.16M 2.18MB/s eta 9s
> ode-server-linux-ar 33%[=====> ] 7.96M 2.28MB/s eta 9s
> de-server-linux-arm 37%[======> ] 8.96M 2.42MB/s eta 9s
> e-server-linux-armh 40%[=======> ] 9.83M 2.62MB/s eta 9s
> -server-linux-armhf 41%[=======> ] 9.99M 2.46MB/s eta 6s
> server-linux-armhf. 46%[========> ] 11.30M 2.74MB/s eta 6s
> erver-linux-armhf.t 48%[========> ] 11.68M 2.76MB/s eta 6s
> rver-linux-armhf.ta 52%[=========> ] 12.63M 2.89MB/s eta 6s
> ver-linux-armhf.tar 57%[==========> ] 13.91M 3.17MB/s eta 6s
> er-linux-armhf.tar. 61%[===========> ] 14.74M 3.22MB/s eta 4s
> r-linux-armhf.tar.g 65%[============> ] 15.68M 3.24MB/s eta 4s
> -linux-armhf.tar.gz 68%[============> ] 16.55M 3.19MB/s eta 4s
> linux-armhf.tar.gz 72%[=============> ] 17.34M 3.14MB/s eta 4s
> inux-armhf.tar.gz 73%[=============> ] 17.60M 3.42MB/s eta 4s
> nux-armhf.tar.gz 77%[==============> ] 18.71M 3.56MB/s eta 2s
> ux-armhf.tar.gz 79%[==============> ] 19.16M 3.42MB/s eta 2s
> x-armhf.tar.gz 82%[===============> ] 19.80M 3.40MB/s eta 2s
> -armhf.tar.gz 84%[===============> ] 20.33M 3.25MB/s eta 2s
> armhf.tar.gz 86%[================> ] 20.90M 3.12MB/s eta 2s
> rmhf.tar.gz 89%[================> ] 21.60M 3.15MB/s eta 1s
>
> mhf.tar.gz 92%[=================> ] 22.30M 3.52MB/s eta 1s
> hf.tar.gz 95%[==================> ] 22.93M 3.55MB/s eta 1s
> f.tar.gz 97%[==================> ] 23.47M 3.38MB/s eta 1s
> vscode-server-linux 100%[===================>] 24.07M 3.31MB/s in 8.5s
> 2019-06-25 10:57:09 URL:https://az764295.vo.msecnd.net/insider/e80dd4f217db6e230d311a87fdf4276f740f6445/vscode-server-linux-armhf.tar.gz [25235643/25235643] -> "vscode-server-linux-armhf.tar.gz" [1]
> Download complete
> SHELL=/bin/bash
> LANGUAGE=en_US.UTF-8
> PWD=/home/pi
> LOGNAME=pi
> XDG_SESSION_TYPE=tty
> HOME=/home/pi
> LANG=en_US.UTF-8
> VSCODE_AGENT_FOLDER=/home/pi/.vscode-server-insiders
> SSH_CONNECTION=192.168.0.11 60395 192.168.0.25 22
> XDG_SESSION_CLASS=user
> USER=pi
> SHLVL=1
> XDG_SESSION_ID=c6
> XDG_RUNTIME_DIR=/run/user/1000
> SSH_CLIENT=192.168.0.11 60395 22
> LC_ALL=en_US.UTF-8
> PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
> DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
> MAIL=/var/mail/pi
> _=/usr/bin/printenv
> OLDPWD=/home/pi/.vscode-server-insiders/bin/e80dd4f217db6e230d311a87fdf4276f740f6445
> Starting server...
> Waiting for server log...
> Waiting for server log...
> Waiting for server log...
> Waiting for server log...
> Waiting for server log...
> Waiting for server log...
> Waiting for server log...
> Waiting for server log...
>
> *
> * Reminder: You may only use this software with Visual Studio family products,
> * as described in the license (https://go.microsoft.com/fwlink/?linkid=2077057)
> *
>
> Server did not start successfully. Full server log >>>
>
>
> *
> * Visual Studio Code Server
> *
> * Reminder: You may only use this software with Visual Studio family products,
> * as described in the license https://aka.ms/vscode-remote/license
> *
>
>
> <<< End of server log
"install" terminal command done
Received install output: <<< End of server log
Failed to parse remote port from server output: <<< End of server log
------
re #76022
It's probably not related to the ARM support but the first time when I try to establish the connection, it fails to parse port from the server log. I saw the same thing when I create a new VM and connect to it.