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Thread: Ubuntu very slow

  1. #1
    Join Date
    Jul 2014

    Ubuntu very slow

    Hello everyone,
    I've installed ubuntu on virtualbox on my windows 7.
    I only have a big problem: It runs so very slow.
    I gave Ubuntu the recommended amount of ram, so everything should work fine i think.
    Is there anyway to fix this?
    BTW i have to run it from the cd, because it can't detect my windows and if i want to install it, it wil erase everything i have on my pc it says.
    So i don't know if that could cause the slowness, if so: How can i fix the system error?
    Last edited by RaoulJWZ; July 3rd, 2014 at 12:23 PM.

  2. #2
    Join Date
    Nov 2012
    Halloween Town
    Xubuntu Development Release

    Re: Ubuntu very slow

    Moved to the Virtualisation sub-forum.

    What sort of resources have you given to your VM:

    • How many 'Processors' have you allocated?
    • How much RAM have you allocated to the VM?
    • How much video memory?

    Take a read at this guide to speed up Virtual Machines:

  3. #3
    Join Date
    Nov 2004
    Ubuntu Development Release

    Re: Ubuntu very slow

    if your running it from CD it's going to be slow as it has to uncompressed the files on the fly.
    you should be able to install it in your Virtual machine without affecting any windows host programs.

    but if you want to install it to the Hard Drive you need to be careful about how you install. The disk partitioning page is the important step.
    There is a choice on that page that should offer to install ubuntu along side Windows and it will shrink the windows space and make room for ubuntu for you.
    As Always though back up any important files first. Mistakes do happen!

    here is a page about dual booting that may be of help.
    Other than that install it to VirtualBox it will be a bit slower than an H.D. Install but will be much faster than running for the live DVD.
    Last edited by kc1di; July 3rd, 2014 at 12:40 PM.
    Wireless script
    Registered Linux User #462608
    Morse Code an early Digital Mode.

  4. #4
    Join Date
    Dec 2005
    Western Australia
    Ubuntu 12.04 Precise Pangolin

    Re: Ubuntu very slow

    Ubuntu requires 3D acceleration. If you don't have 3D acceleration (for instance, inside a virtual machine) it uses the CPU to render the desktop. This is quite a bit slower than using your GPU.

    Virtualbox comes with a "Guest Additions" package that enables some level of graphics acceleration in Linux guest OSes, you should consider installing that. You may get a bit of a speedup.
    I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.

  5. #5
    Join Date
    Mar 2010
    Lubuntu 14.04 Trusty Tahr

    Re: Ubuntu very slow

    Old/slow CPUs cannot be fixed. What is yours?
    After that, follow these instructions on settings - it isn't just RAM:

    You don't need to run from a CD. That will be terribly slow. Re-read my other posts to you in the other thread and create a vHDD for the VM to install Ubuntu into.

    BTW - this virtualization stuff takes time to get used to. It is hard to think "virtual machine" until you get used to it. It will NOT wipe your windows install.


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