[Ubuntu]Linux kernel degrade

[Env.]
Ubuntu 14.04 LTS
Kernel 3.19.0-51
20160301

[Step]
1 ) Install kernel image & header file

$ sudo apt-get install -y linux linux-image-3.13.0-24-generic linux-headers-3.13.0-24

2 ) Edit Grub

$ sudo vi /etc/default/grub# Change:# GRUB_DEFAULT=0GRUB_DEFAULT=”Advanced options for Ubuntu>Ubuntu, with Linux 3.13.0-24-generic”

3 ) Update Grub & reboot

$ sudo update-grub

[Refer]
http://www.oldcai.com/archives/1026