It sounds like you don't have the GD extension installed. I don't use Ubuntu any longer, but I think it may be named php5-gd,...
kvm
KVM Guest Drivers for Windows 2018 Overview This page describes how to obtain and use virtio drivers for Windows virtual machines running on KVM, and additional...
How to install Xfce on Ubuntu
Dell docking station (D3100) not detecting monitors, We had the same issue. Make sure you install the driver
Kernel-based Virtual Machine (KVM) is a virtualization module for the Linux kernel that turns it into a hypervisor. How can I install KVM with...