Linus Torvalds has announced the Linux Kernel 3.11 on the mailing list. The big feature is Radeon dynamic power management support has finally come to AMD’s open-source driver. See the official announcement

To install or upgrade to Linux Kernel 3.11 in Ubuntu 13.04, Ubuntu 12.10 and Ubuntu 12.04. Press Ctrl+Alt+T to open terminal, then follow the steps below:

1.) Download the Debs from Kernel PPA:

for 32-bit system:

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-saucy/linux-headers-3.11.0-031100-generic_3.11.0-031100.201309021735_i386.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-saucy/linux-headers-3.11.0-031100_3.11.0-031100.201309021735_all.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-saucy/linux-image-3.11.0-031100-generic_3.11.0-031100.201309021735_i386.deb

for 64-bit system:

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-saucy/linux-headers-3.11.0-031100-generic_3.11.0-031100.201309021735_amd64.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-saucy/linux-headers-3.11.0-031100_3.11.0-031100.201309021735_all.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-saucy/linux-image-3.11.0-031100-generic_3.11.0-031100.201309021735_amd64.deb

2.) Install the Kernel:

sudo dpkg -i linux-headers-3.11.0*.deb linux-image-3.11.0*.deb

That’s it! Once installed, you need a restart to take effect.