Host performance slow with Windows 8 Guest

[hermann1514]

Hi,
my VirtualBox is running on a Ubuntu 13.04, with 4GB Ram and a Intel Core 2 Dua 3GHz.
When i start my Windows 8 Guest the Host has extremly Performance issues. I cannot start the Browser and so on. After i shut down the VM all works fine.
The configuration for my VM is:
1.5 GB RAM
2 Processor
Display RAM 256MB
3D enabled
VT-x/AMD-V,Nested Paging and PAE/NX are enabled.

I have installed the latest updates for ubuntu.

Is there a soloution for this?

Regards
Hermann

[mpack]

Lets see, you have a dual core CPU, and you are assigning both cores to the guest, leaving nothing for the host. What could possibly go wrong with that?

If you want any further help then please provide basic diagnostic info: see Minimum information needed for assistance.

[hermann1514]

This was a hint from another Board.

This Problem is only in FullScrenMode. When i use the VM in WindowMode then the Performance is ok.

Regards
Hermann

[hermann1514]

I use:
Ubuntu 13.04 64Bit as Host
Windows 8 Ent. 64 Bit
GuestTools are installed
VirtualBox the latest Version 4.2.12r84980

Attaches the LOG Files.

Regards
Hermann