I upgraded my kernel to version 4.4.8 in an attempt to enable suspend/hybernate, but in turn it decreased the battery life. So i want to either
a. delete je 4.4.8 and revert to 4.4.0 kernel in my Ubuntu 16.04 LTS
b. leave the new kernel, but make the older (4.4.0) default booting kernel.
I'm a bit inexperienced with this, so I'd like steps and heads-ups 🙂
Also, should I just stick with the shipped kernel and await fixes and updates for my systems, or should I upgrade kernels as I see fit. What is the recommendation?
Output of dpkg -l | grep linux
ii console-setup-linux 1.108ubuntu15 all Linux specific part of console-setup
ii ladspa-sdk 1.13-2 amd64 sample tools for linux-audio-dev plugin architecture
ii libselinux1:amd64 2.4-3build2 amd64 SELinux runtime shared libraries
ii libselinux1:i386 2.4-3build2 i386 SELinux runtime shared libraries
ii libv4l-0:amd64 1.10.0-1 amd64 Collection of video4linux support libraries
ii libv4lconvert0:amd64 1.10.0-1 amd64 Video4linux frame format conversion library
ii linux-base 4.0ubuntu1 all Linux image base package
ii linux-firmware 1.157 all Firmware for Linux kernel drivers
ii linux-generic 4.4.0.21.22 **amd64 Complete Generic Linux kernel and headers
ii linux-headers-4.4.0-21 4.4.0-21.37 all Header files related to Linux kernel version 4.4.0
ii linux-headers-4.4.0-21-generic 4.4.0-21.37 amd64 Linux kernel headers for version 4.4.0 on 64 bit x86 SMP**
ii linux-headers-4.4.8-040408 4.4.8-040408.201604200335 all Header files related to Linux kernel version 4.4.8
ii linux-headers-4.4.8-040408-generic 4.4.8-040408.201604200335 amd64 Linux kernel headers for version 4.4.8 on 64 bit x86 SMP
ii linux-headers-generic 4.4.0.21.22 amd64 Generic Linux kernel headers
ii linux-image-4.4.0-21-generic 4.4.0-21.37 amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii linux-image-4.4.8-040408-generic 4.4.8-040408.201604200335 amd64 Linux kernel image for version 4.4.8 on 64 bit x86 SMP
ii linux-image-extra-4.4.0-21-generic 4.4.0-21.37 amd64 Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii linux-image-generic 4.4.0.21.22 amd64 Generic Linux kernel image
ii linux-libc-dev:amd64 4.4.0-21.37 amd64 Linux Kernel Headers for development
ii linux-sound-base 1.0.25+dfsg-0ubuntu5 all base package for ALSA and OSS sound systems
ii linux-tools-4.4.0-21 4.4.0-21.37 amd64 Linux kernel version specific tools for version 4.4.0-21
ii linux-tools-4.4.0-21-generic 4.4.0-21.37 amd64 Linux kernel version specific tools for version 4.4.0-21
ii linux-tools-common 4.4.0-21.37 all Linux kernel version specific tools for version 4.4.0
ii linux-tools-virtual 4.4.0.21.22 amd64 This package will always depend on the latest minimal generic kernel tools.
ii pptp-linux 1.8.0-1 amd64 Point-to-Point Tunneling Protocol (PPTP) Client
ii syslinux 3:6.03+dfsg-11ubuntu1 amd64 collection of bootloaders (DOS FAT and NTFS bootloader)
ii syslinux-common 3:6.03+dfsg-11ubuntu1 all collection of bootloaders (common)
ii syslinux-legacy 2:3.63+dfsg-2ubuntu8 amd64 Bootloader for Linux/i386 using MS-DOS floppies
ii util-linux 2.27.1-6ubuntu3 amd64 miscellaneous system utilities
Best Answer
Restart your computer, when your BIOS is through quickly press shift to open the GRUB menu, you might need a few tries to get the timing right.
There choose Advanced options and select to boot with the older kernel. Then you can safely uninstall everything that belongs to the newer kernel and be done with it: