Silverlight video playback stops after a few minutes if more than one CPU core is specified

[cerz]

Host is Ubuntu 12.04 64-bit. Guest is Windows 7 64-bit. Ubuntu package virtualbox-qt-4.1.12-dsfg-2

Silverlight video playback (e.g. Netflix) works correctly for 1-10 minutes before stopping, leaving only a black screen in the silverlight window.

Workaround: Run with only 1 CPU allocated to the guest OS.

Hardware:

Hardware- Core i7, Nvidia gt430 based gpu. Virtualbox config: 5000MB RAM allocated to guest, dynamically allocated disk (VDI). VT-x/AMD-V enabled, nesting paging enabled. Tried with 3D/2D acceleration disabled and enabled. All other settings are installation default.

[cerz]

I forgot to mention that Guest Additions are installed.

[Marcello Romani]

Thanks to this information I was finally able to watch live TV inside VirtualBox on Ubuntu 12.04/x64. I had the video lockup almost immediately, until I noticed I had 2 CPUs allocated to VirtualBox. Set it to one and the problem was solved.

Thank you!

For the record, my system specs are the following:

cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.2 LTS"

uname -a
Linux mylaptop 3.2.0-40-generic #64-Ubuntu SMP Mon Mar 25 21:22:10 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

CPU: Phemon II X4 1.8GHz
RAM: 6GB

Virtual machine: 2048MB RAM, 32-bit Windows XP

[jpf-uga]

Thanks for the info! I was running into this problem as well. Quite frustrating. Reverting back to 1 vcpu fixed it.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.