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I have 12.04LTS installed on my laptop. I want to upgrade it to 14.04LTS. I tried to find a method but didn't succeed. I read somewhere that I can directly upgrade from one LTS to other but how?

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  • My internet connection is slow. So, I might not be able to download the new version in one go. Is that a big problem?
    – Manish Kumar Bisht
    Apr 18, 2014 at 7:55

1 Answer 1

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First, you need to remove all 3rd party binary drivers such as NVIDIA or AMD graphics card driver.

(Because 3rd party drivers only works with current kernel and will not work with newer version. You may see blank screen with older driver version. Hence, remove, update, and reinstall to save time.)

Once removed and rebooted the desktop.Then:

Open terminal by ctrl+alt+t .

  1. install update-manager-core by:

    sudo apt-get install update-manager-core

  2. upgrade the newest version by:

    sudo do-release-upgrade -d

Finally, reinstall 3rd party binary drivers.

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    -d flag is for upgrading to development releases
    – cshubhamrao
    Apr 18, 2014 at 6:13
  • if -d is for development releases then what should I give argument. -f ? I have seen it somewhere.
    – Manish Kumar Bisht
    Apr 18, 2014 at 7:40
  • To force upgrade pass the -d option to sudo do-release-upgrade command.
    – Thusitha Sumanadasa
    Apr 18, 2014 at 8:36

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