etx

set virtualbox for Andes' tvm

Error in (line 142) -- Invalid value 'VBOXSVGA' in Display/@controller attribute.
solution:
1. upgrade from 5.x to 6.1
    https://forums.virtualbox.org/viewtopic.php?t=91472
   "ubuntu 18.04 upgrade virtualbox 5.2 to 6" -> https://tecadmin.net/install-virtualbox-on-ubuntu-18-04/
2. RTR3InitEx failed with rc=-1912 (rc=-1912)
  delete old virtualbox https://askubuntu.com/questions/900794/virtualbox-rtr3initex-failed-with-rc-1912-rc-1912

// use the following ssh to avoid turning into black within a while of idle.
ssh -p 9022 user@127.0.0.1 
// For ssh, setup tvm VM as follows
sudo apt install ssh
U2104 - Settings - Network - Port Forwarding Rules - Protocal:TCP, Host Port:9022, Guest Port:22