Ubuntu Server 18.04 LTS cannot change resolution in Hyper-V

I changed both the CMD_LINE_DEFAULT and the next CMD_LINE with the same value (resolution I wanted), updated then rebooted, and it worked.

Like this:

GRUB_CMDLINE_LINUX_DEFAULT=video=hyperv_fb:1366×768
GRUB_CMDLINE_LINUX=video=hyperv_fb:1366×768

Since this question was asked (re ~ Ubuntu 15.04) things have progressed significantly with regards to Hyper-V & Ubuntu 18.04.1 with regards to ‘Enhanced Session Mode’.

There are two approaches currently:

A. New System ~~ Optimized Ubuntu Desktop images available in Microsoft Hyper-V gallery

B. Existing System ~~ manually configure xRDP to support ‘Enhanced Session Mode’

Here are the details:

Option A)

1. In Hyper-V, on your server & select [Quick Create]
2. In the [Create Virtual Machine] dialog, select [Ubuntu 18.04.1 LTS] && then [Create Virtual Machine]
3. Then complete the standard Ubuntu installation options
4. ‘Enhanced Session Mode’ will prompt you to setup screen resolution, local resources, etc.
5. Note/Caution ~ if you have problems using drives, then you may want to de-select the [Printers]

Here are the links to where I sourced the information:

○ Optimised Ubuntu Desktop images available in Microsoft Hyper-V gallery

○ Run Ubuntu virtual machines made even easier with Hyper-V Quick Create

Option B)

1. Modify Ubuntu 18.04 to use xrdp

   1.1 Get the scripts from GitHub

   sudo apt-get update
   sudo add-apt-repository ppa:git-core/ppa
   sudo apt update; sudo apt install git
   git clone https://github.com/jterry75/xrdp-init.git ~/xrdp-init
   

   1.2 Make the scripts executable and run them...

   cd ~/xrdp-init/ubuntu/18.04/
   sudo chmod +x install.sh
   sudo ./install.sh
   reboot
   

   1.3 <After Reboot> Run script again to finish setting up VM

   cd ~/xrdp-init/ubuntu/18.04/
   sudo ./install.sh
   

2. Shutdown Ubuntu VM

3. Register Ubuntu Session ~ run this command on host PC using powershell with admin rights:

   Set-VM -VMName YourUbuntuVMNameHere -EnhancedSessionTransportType HvSocket
   

4. Restart VM

5. Connect/Login to XRDP from Hyper-V (note ~ enter username - must be lowercase)

6. Note/Caution ~ if you have problems using drives, then you may want to de-select the [Printers]

Here is the link to where I sourced the information:

• Windows 10: A guide how to run Ubuntu 18.04 in Enhanced Mode in Hyper-V