Augmenter la résolution d’affichage pour les système invités Ubuntu s’exécutant sur Hyper-V

    Install linux-image-extras (hyperv-drivers): sudo apt-get install linux-image-extra-virtual
    Open the Terminal and type: sudo gedit /etc/default/grub
    Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT, and add video=hyperv_fb:1920x1080 (or your preferred resolution) in between the quotes (The maximum possible resolution is 1920x1080) like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1920x1080"

• https://askubuntu.com/questions/384602/ubuntu-hyper-v-guest-display-resolution
• https://unix.stackexchange.com/questions/98389/how-can-i-add-an-additional-framebuffer-device-in-linux