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How do I update my kernel to 3.8 RC7 on Ubuntu 12.10? I need step by step instructions. I did a Google search but only found instructions on rc5 and below.

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Instructions for installing a new "mainline" kernel aren't specific for any version. Just install the packages.

  1. Go to the download page for Ubuntu mainline kernel packages.
  2. Select the kernel version - e.g. v3.8-rc7-raring
  3. Download the packages fit for your architecture. For 64 bit this is all amd64 marked, for 32-bit this is i386. Also pick the architecture-independent packages marked with all. So:

    • 64-bit: 1, 2, 3, 4.
    • 32-bit: 1, 2, 3, 4.
  4. Install them all at once:

    sudo dpkg -i /path/to/Downloads/linux-*3.8.0*.deb
  5. Update your Grub bootloader (most general installations are running Grub).

    sudo update-grub
  6. Done.

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You can download the source and build, or use deb packages found in

3 packages should be downloaded, depending on your architecure (amd64, i386, or armhf). linux-headers-3.8.0-030800rc7_3.8.0-030800rc7.201302081635_all.deb is needed regardless of your platform. Once downloaded, open a shell prompt (xterm), cd to Downloads or directory/folder where the files were downloaded, and run 'sudo dpkg -i *.deb'. Once installed, reboot and check the kernel version via 'uname -r' from a shell prompt. Good luck and have fun.

Update: For all versions after v3.8-rc3 (including the latest v3.8.0), there is a conflict with virtualbox due to macros that were removed in include/linux/init.h. To properly build, one must either patch virtualbox source -or- use v3.8-rc3's version of the init.h header file. FYI to avoid any surprises.

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