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I set export UNITY_LOW_GFX_MODE=1 in my ~/.xprofile and it no longer has any effect in 13.04. Is there a way to disable all the eye candy? I'm running in VirtualBox and the Unity 3D mode with all the visual effects is overwhelming for the VM. Unity works and is usable, it's just very slow to render, so I'd rather have it off (is this 2D mode?).

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There are known issues with virtualbox and unity which does not allow unity 3D to function properly as expected ( when you don't have Graphics card). Try using different Desktop like Cinnamon or Gnome. or just disable 3D from Vbox settings. –  Nitin Aug 3 '13 at 6:15
    
Sorry Because I can't add comment to above answer. So I add another answer as comments: I tried answer of Takkat. On step: "Do not disable windows decoration above". Because mine "windows decoration" is uncheck. So I check it. But later my Ubuntu windows menu is disappeared. When it restarted, desktop is disappeared. My ubuntu is 14.04. 3D is enabled. –  阿彌陀佛 Jul 17 at 8:27
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1 Answer 1

up vote 13 down vote accepted

Especially on a low end machine such as mine (Athlon dual core, GForce 210) running Ubuntu with Unity and Compiz enabled is quite a challenge and may result in a rather slow and sluggish experience.

Virtual machine settings

To improve this I gave the following settings to the virtual machine:

  • enable VT-x/AMD-V, Nested Paging
  • 2 CPU (from dual core host) with an execution cap at 90% to ensure host operability
  • 2048 Base Memory
  • 256 MB Video Memory

    VBoxManage modifyvm "Name of VM" --vram 256
    
  • 3D Acceleration enabled

  • Guest Additions installed

Remove desktop effects

Then I observed a very slow animation for windows and menus. This animations did more harm than use in my virtual machine. Below is three methods how to disable them to get a smoother experience in Virtual Box:

Unity Tweak Tool Install unity-tweak-tool

This awesome application lets you disable animations in the Window Manager/General settings dialog:

enter image description here

Compiz Config Settings Manager Install compizconfig-settings-manager

As this is a virtual machine with the option to make a snapshot before you do harmful things to your OS you may probably safely runs ccsm to disable Compiz effects:

enter image description here

Do not disable windows decoration above

Dconf Editor

Lastly here is how to do it with dconf-editor:

  • Browse to org.compiz.profiles.default.core and remove the following from active profiles:

    'animations' 'fade'
    
  • Browse to org.compiz.profiles.unity.core and remove the following from active profiles:

    'animations'
    

Unfortunately I have found no way to disable the Dash animation, which still will be rather slow.

GNOME Session Flashback Install gnome-session-flashback

In the likely case you are still not happy with the overall speed of the desktop you may consider installing the GNOME Session Flashback, which will let you log into GNOME Flashback (Compiz or Metacity) with a lean and fast desktop reminiscent of 10.04, but with all the upgraded applications, and the recent kernel:

enter image description here

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enter image description here

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Incredibly helpful thank you so much!!! –  Mark Richman May 3 '13 at 13:01
    
unity tweak tool can be install be typing, in a termianal: "sudo apt-get install unity-tweak-tool" –  Tom Jul 10 '13 at 13:37
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