Kernel 3.80 in Kubuntu LTS 12.04.3

[linuxforall]

I downloaded the latest Kubuntu 12.04.3 to use with my Ivybridge/Nvidia laptop as it has the latest compatible kernel 3.8 from Raring. Strangely after install it shows kernel 3.20 and not kernel 3.8, has anyone experienced this?

[kubicle]

Can you post the output of:
1. 'uname -a'
2. 'dpkg -l | grep linux-image'

[jglen490]

Sorry. But I loaded 12.04.3 on my fresh re-built desktop, with the following:
john@john-Dimension-3000:~/Documents$ sudo lsb_release -a
[sudo] password for john:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.3 LTS
Release: 12.04
Codename: precise
john@john-Dimension-3000:~/Documents$
john@john-Dimension-3000:~/Documents$ uname -a
Linux john-Dimension-3000 3.2.0-52-generic-pae #78-Ubuntu SMP Fri Jul 26 16:43:19 UTC 2013 i686 i686 i386 GNU/Linux
john@john-Dimension-3000:~/Documents$
john@john-Dimension-3000:~/Documents$ dpkg -l|grep linux-image
ii linux-image-3.2.0-37-generic-pae 3.2.0-37.58 Linux kernel image for version 3.2.0 on 32 bit x86 SMP
ii linux-image-3.2.0-49-generic-pae 3.2.0-49.75 Linux kernel image for version 3.2.0 on 32 bit x86 SMP
ii linux-image-3.2.0-51-generic-pae 3.2.0-51.77 Linux kernel image for version 3.2.0 on 32 bit x86 SMP
ii linux-image-3.2.0-52-generic-pae 3.2.0-52.78 Linux kernel image for version 3.2.0 on 32 bit x86 SMP
ii linux-image-generic-pae 3.2.0.52.62 Generic Linux kernel image
john@john-Dimension-3000:~/Documents$
Not a sign of a 3.8 kernel anywhere. I'm not saying the Ubuntu lied in their release notes, but 3.8 is not present for duty.

[kubicle]

Not a sign of a 3.8 kernel anywhere. I'm not saying the Ubuntu lied in their release notes, but 3.8 is not present for duty.

I think the newer kernels were meant to be optional (as in you can stick with 3.2 series if you wish).
You can install the newer kernels from the repos, I think the meta package for 3.8 series is called 'linux-generic-lts-raring' (meaning it's the raring kernel ported to lts [precise]), there should also be 'linux-generic-lts-quantal' which is the 3.5 kernel from quantal.

Do the release notes say that the newer kernels are on the images or installed by default (or just that they are available)?
EDIT: I gave the release notes a quick look, and looks like the newer kernel *should* be installed by default with the 12.04.3 images, so there seems to be something amiss. You should still be able to install them manually.

[GreyGeek]

I decided to reinstall 12.04 using 12.04.3 and my installation got to 90% and there it stays.
But, to answer your question -- here is what is showing with "uname -a" while the LiveCD is booted and running:
$ uname -a
Linux kubuntu 3.2.0-52-generic #78-Ubuntu SMP Fri Jul 26 16:21:44 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[jglen490]

I'll stick with 3.2.

[kubicle]

I'll stick with 3.2.

That's a reasonable choice if you don't need 3.8 for specific hardware. The 3.2 series will be supported (with security updates) through the life span of 12.04 (into 2017), the newer backported kernels are only supported until 14.04.1 (into 2014):
https://wiki.ubuntu.com/Kernel/LTSEn...and_Procedures

[linuxforall]

I have a Ivybridge I7 laptop that will benefit form the newer 3.8 kernel, in fact the 3.11 has enhanced P states for better power savings so newer kernel with this kind of hardware is definitely a good idea. On Ubuntu 12.03.3 the nvidia driver and nvidia prime for Optimus support gets installed right out of the box.

[GreyGeek]

I have a Ivybridge I7 laptop that will benefit form the newer 3.8 kernel, in fact the 3.11 has enhanced P states for better power savings so newer kernel with this kind of hardware is definitely a good idea. On Ubuntu 12.03.3 the nvidia driver and nvidia prime for Optimus support gets installed right out of the box.

My Acer V3-771G has an i7-3610QM with a max temp of 105C (225F). Before I reinstalled 12.04 I had installed the 3.8 kernel and noticed an immediate drop in average temperature from 150F down to 135F. Now that I've reinstalled 12.04.3 with the 3.2 kernel my idle temp is back up to 150F. While running Minecraft in full screen the temps under 3.8 would rise to 205F max. With the 3.2 kernel I am getting 215 and at times 220F. I may be blowing my laptop out to clear the dust or getting a fan.

[linuxforall]

My Acer V3-771G has an i7-3610QM with a max temp of 105C (225F). Before I reinstalled 12.04 I had installed the 3.8 kernel and noticed an immediate drop in average temperature from 150F down to 135F. Now that I've reinstalled 12.04.3 with the 3.2 kernel my idle temp is back up to 150F. While running Minecraft in full screen the temps under 3.8 would rise to 205F max. With the 3.2 kernel I am getting 215 and at times 220F. I may be blowing my laptop out to clear the dust or getting a fan.

When I run Manjaro with kernel 3.10 my temps drop to 42C compared to average of 51C with Bumblebee in Ubuntu, with Bumblebee not running and using Optimus the temps go up to 54C on average. This is the reason I am in favor of using newer kernel for newer hardware. The Linux kernel gets new patches for power management regularly so either they are backported or we would need new kernels like in rolling release.

[kubicle]

This is the reason I am in favor of using newer kernel for newer hardware.

This is completely fine, too. Especially if you plan to move to 14.04 LTS (when it's released) which means you don't really need the longer support period for the 12.04 stock kernel.