Ubuntu Guide shows you how to upgrade the Ubuntu 11.04 Kernel to 2.6.39.0
Ubuntu 11.04 has many known issues posted on its release notes, one line said:Ubuntu 11.04 Upgrade Linux Kernel to 2.6.39.0
On certain systems, a bad interaction between Unity, the GL driver and the kernel may cause the system to hang. (740126)
This is a frequent screen frozen issue, and its said has something to do with the kernel.
