How to copy qemu raw images

I don't know how auto-resize in Virtualbox works, but I also searched for disabling clipboard sharing through Spice on my Linux system. Ivan Kozik's comment above pointed me in the right direction, but did lack some information which i had to gather and want to share:

1. You need to have libvirt package installed to use virsh.
2. Type in terminal: virsh edit NAME where NAME is the name of your guest. The Domain XML is opened with vim in your terminal. If you are not familiar with the commands, find yourself a cheat sheet.
3. Under <devices> find <graphics> and inside add the line
   <clipboard copypaste='no'/>. Save and exit.
   For further information search in their docs.
4. Restart the guest. And you will notice that the clipboard sharing is gone.

The video memory size can be defined using the vgamem_mb property on the VGA device:

qemu -device VGA,vgamem_mb=64 ...

will allocate 64 MiB to the framebuffer (instead of the default 16 MiB IIRC).

Some drivers have specific properties:

• the virtio GPU uses max_hostmem instead to specify how much host memory it’s allowed to use;
• the QXL driver adds ram_size_mb, vram_size_mb, and vram64_size_mb, to define the size of the two regions it uses: ram stores the framebuffer, command rings, rendering commands and image data, and vram stores spice surfaces (see this email for details).