virtualbox.org

It complains about the lack of video memory. Installs 256 MB (maximum). Can you solve this problem?

The amount of memory is the least of your problems:

PowerDVD system requirements wrote:Graphics Processor (GPU)

• Blu-ray Disc, DVD, and TrueTheater HD/3D Playback
  • Intel HD Graphics, ATI Radeon HD 5000, NVIDIA GeForce 9500GT or above
    Note: We strongly recommend that you update your graphics card driver to the latest version. 3D display devices are required for TrueTheater 3D playback.
  Blu-ray 3D Playback
  • Intel HD Graphic (Intel Core i5), NVIDIA GeForce GTX 400 series and GeForce GT 240/320/330/340, AMD Radeon HD 6000 and 6000M series with UVD 3 support
  DVD Playback
  • PCI Express graphic accelerator supporting DirectX 9.0 or above

You have none of those graphics cards, you have a "VirtualBox Graphics Adapter", fake, virtual graphics card.

where I can read, why not make a direct access to the video card?

You need two graphics cards (one for the host, one for the guest), a Linux host that supports IOMMU and a motherboard that supports VT-d. If you have to ask what these are, it's not for you.

If you have all of these, it's not guaranteed that it will work, and nobody can help you with that. Read the User Manual, Ch. 9.6. PCI passthrough.

socratis wrote:You need two graphics cards

Now still need to have two video cards?

Unless you're planning on your host to use aether, yes.

I thought I gave you the link for the requirements in the user manual...