After upgrading to 14.04, my kernel is not upgraded! it's like before:
Linux Boxi 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Here's what I did:
sudo apt-get update
sudo apt-get dist-upgrade
sudo do-release-upgrade
sudo apt-get update
sudo apt-get dist-upgrade
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty
Just upgrade your kernel afterwards using apt-get.
What you need is
sudo apt-get dist-upgrade
More more info check this question - What is “dist-upgrade” and why does it upgrade more than “upgrade”?