How can I upgrade the Ubuntu 12.04.2 kernel to 3.5.0-23?

Question

I just installed Ubuntu 12.04.2 64-bit on my desktop PC and I see the kernel in System Monitor is 3.5.0-23 but in Ubuntu 12.04.2 in my laptop the kernel is 3.2.0-38.

I have already tried to run the command sudo apt-get upgrade && sudo apt-get dist-upgrade on my laptop but it doesn't update the kernel.

How can I upgrade kernel for my laptop?

Answer 1

New deployments of 12.04.2 will be installed with an updated kernel and a new X windows stack. For existing 12.04 deployments, users will need to opt-in to what is being called the LTS Hardware Enablement Stack.

In order to upgrade to the 3.5 kernel on 12.04.2, you will need to run the following command(s):

For the new kernel:

sudo apt-get install linux-image-generic-lts-quantal

For the new X stack:

sudo apt-get install xserver-xorg-lts-quantal

WARNING: If you are using the xorg-edgers PPA, do not install the xserver-xorg-lts-quantal package as this will most likely result in breakage.

Reference: https://launchpad.net/~xorg-edgers/+archive/ppa

This is only recommended for x86 hardware installations.

See also:

• The 12.04.2 Release Notes for more details.
• Quantal backported kernel in 12.04.2? What's going on there?
• How to remove Kernel/LTS Enablement Stack?

Answer 2

The simplest set of instructions I always used for kernel upgrade / downgrade are by ubuntuforums.org user by the name of lykwydchykyn (url modified by me for this post):

Go here: http://kernel.ubuntu.com/~kernel-ppa/mainline/ Download 3 (maybe 4) debs to a folder somewhere:

linux-headers-VERSION-NUMBER_all.deb
linux-headers-VERSION-NUMBER_amd64.deb
linux-image-VERSION-NUMBER_amd64.deb
linux-image-extra-VERSION-NUMBER_amd64.deb   # if available

Install the debs with whatever package manager front-end you use (is gdebi still around?), or use these commands:

cd /path/to/folder/where/you/put/the/debs
sudo dpkg -i *.deb

Source: http://ubuntuforums.org/showthread.php?p=11391743#post11391743

Answer 3

Of course you can install 3.5.0 kernels, run apt-get install linux-image-generic-lts-quantal to install the latest quantal 3.5.0 kernel. This package will ensure that you always have the latest quantal kernel.

I personally recommend raring's 3.8 (base on upstream 3.8.8) kernel anyway.

NOTE: search for available 3.5.0 kernels apt-cache search linux-image-3.5.0.

BTW: You can even manually download latest mainline kernels and install them, for example 3.7.9. However, if you install PPA mainline kernels manually, you'll have to manually install updates.

http://kernel.ubuntu.com/~kernel-ppa/mainline/