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I'm trying to set up a Virtualbox using Ubuntu 16.04 as guest (and host as well, the machine is an Alienware 17R3).

However, the video does not seems to work. I did a fresh install and did install the guest additions.

Finally, I reduced the problem that if I set the video memory to 50MB and disable the 3D acceleration, the video start playing. The play is a little chopy and does not flow well, but it plays.

How can I increase the memory of the video card and have the machine play videos?

Let me know if you need some logs.

Host specs:

  • RAM: 16 GB

Guest specs:

  • RAM: 10000 MB
  • How much RAM did you allocate to the guest OS? How much RAM in the host? Cheers, Al – heynnema Oct 5 '16 at 23:56
  • What are you using to play the video? Unfortunately, VB 3D acceleration tends to conflict with 3D acceleration in the VM. Why are you watching videos under Virtualbox Ubuntu anyway? – negusp Oct 5 '16 at 23:59
  • I have around 10GB for the guest, and I disabled the 3D and still got errors on the video. I notice the error because the general video is shown like in blocks when it is rendered (normal window, not video). Then I noticed that video wasn't playing. So i figured that the problem may be the graphics card or memory on the guest. – adn Oct 6 '16 at 0:58

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