Ubuntu Guide shows you how to install Linux Kernel 3.0 RC2 in Ubuntu 11.04

Linux kernel RC2 was just released few hours ago. It has some bug fixes and additional drivers. You may want to try it in your Ubuntu 11.04 installation because it may solve problems and work good for you.

Don’t remove previous Linux kernel after installing it, new kernel may cause new problems and previous can be used for resume.

  How to Install Linux Kernel 3.0 rc2 in Ubuntu 11.04 Natty Narwhal