Ubuntu Resources

Trusty Tahr (Ubuntu 14.04 LTS)

Desktop Search Privacy

Since Quantal Quetzal (12.10), the Ubuntu desktop's search tool, Dash, will (by default) share search queries with other third parties such as Amazon, Twitter, Facebook, etc. To prevent Dash from sharing your desktop search query with the Internet, you can "opt-out" / disable it.

How To Disable
Open up the System Settings and from there open Security & Privacy, top row under "Personal"

Go to the Search tab and you may "slide off" Include online search results.

For additional reading on this topic, see this article written by the Electronic Frontier Foundation.

Very slow performance

Starting with Quantal Quetzal (12.10), Ubuntu's primary window renderer uses a 3D renderer called Compiz. This replaced an older 2D renderer called Metacity. Compiz is intended to work with a 3D capable GPU, which have become very common in PCs. Unfortunately, Compiz can wreak havoc with remote desktop and Virtual Machine software. Starting with Trusty Tahr (14.04 LTS), metacity is no longer available for use with the standard Ubuntu desktop manager, Unity. So, the workaround is to install metacity to use with the GNOME Flashback desktop environment.

Open a command line terminal (CTRL-ALT-T) and issue the following commands:

sudo apt-get install metacity
sudo apt-get install gnome-session-fallback

Once these commands are complete, logout of your session. At the login screen, click the round "unity" button to open "Select desktop environment" and choose GNOME Flashback (Metacity). Now go ahead and log back in.
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Small window in VirtualBox VM

Despite months of beta testing Trusty Tahr, the guest additions of VirtualBox 4.2.x series is incompatible with the X windowing system in Trusty Tahr

FIX with VirtualBox latest version
Upgrade to the latest version of VirtualBox . Make sure to install the guest additions from the guest additions ISO.
  • On the command line: sudo apt-get install dkms linux-headers-$(uname -r)
  • On the menustrip above: Devices → Install Guest Additions and then check for a Guest Additions CD in the VM.
  • Run the virtual CD to install guest additions.

FIX with VirtualBox 4.2.x series
If you need to remain on VirtualBox 4.2.x series, the Guest Additions ISO will not work (this is last known with version ≤ 4.2.24).
Instead, issue the following command:
apt-get install virtualbox-guest-additions-x11
This install should also install other required components. Now restart the VM and it should come back with a larger window. This also enables shared folders in the Ubuntu guest.

Any Ubuntu via VM Software

Bootup Error

SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr

This error says that your virtual machine does not have a system managed BUS — which is normal. Therefore the error can be ignored/disregarded.

-- PeterBailie - 23 Apr 2014
Topic revision: r4 - 23 Apr 2014, PeterBailie

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