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I just installed Ubuntu 13.04 (daily, full updated) and installed Windows 8 in virtualbox.

When Windows 8 is running a have huge performance issues on Ubuntu. Last week I had the same setup with Ubuntu 12.04 (full updated) and I had no problem with the overall performance.

Where is the problem and how can I fix it?

PC:

ubuntu 13.04 x64
4 GiB RAM
4x3,1 Ghz Intel Sandybridge
On-board Graphics

VBOX:

Windows 8 x86
1 GiB RAM
1 CPU
Graphics memory 128MB
Guest-extension is installed
3D-Acceleration active

Takkat
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kmh42
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  • What exactly is the performance drop you experience? – Takkat Apr 23 '13 at 12:22
  • When the VBox is running many programs like dash, thunderbird, firefox, system-settings become grey for few seconds when I try to use them. – kmh42 Apr 23 '13 at 12:48
  • This is only guessing (hence no answer): try to add a second CPU to your guest VM, also try to apply an execution cap to each of them like 80%. Is VT-x enabled in both host BIOS, and the guest VM? – Takkat Apr 23 '13 at 20:46
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    VT-x was already enabled. I switched now to 2 CPUs and I have no performance issuse till now. I will watch the situation and report later on how its peformed – kmh42 Apr 24 '13 at 07:43
  • After a few day and updates it runs pretty good. When I start the Windows 8 machine ubuntu slows down but after the start up it runs well. I think I had the performance issues because I updated and installed many software in W8 and it had 1 CPU. Now the software is installed and up to date. W8 has 2 CPUs and is starting in 5sec so there is not much of a problem now. – kmh42 Apr 26 '13 at 07:28
  • yeah, updating is always the best solution to solve performance issues. Let me suggest you write your own answer to your question with steps you took to resolve this? It may help future visitors, and we have this question "answered". – Takkat Apr 26 '13 at 08:06

2 Answers2

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I believe there is a package called virtualbox-guest-utils. Install it with sudo apt-get install virtualbox-guest-utils. This should get the virtualbox drivers. NOTE: You need the latest virtualbox to support guests with recent linux kernels.

Yet Another User
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I had to do a few things:

install guest additions

install dkms (dynamic kernel module support):

sudo apt-get install dkms

add the line:

vboxvideo

to /etc/modules.

I had already installed gcc prior, you may need that to install the guest additions. I installed the guest additions by the virtualbox menu, under devices; I didn't use apt-get.

guntbert
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Charles Alexander
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