Updating kernel in linux
Other than hardware driver update I don't find the need to upgrade kernel.
New kernels do have security and slight performance upgrade but also have tendency to break things like your VM.
My issue of a black screen when resuming from standby has also disappeared.If not, search around and I'm sure you'll find a tutorial you can follow such as this one.(note that I haven't checked that one thoroughly so be wary as kernels are dangerous beasts) None of the above answers satisfied my problem of manually update the kernel to the latest stable version.However, new Linux user/admin find it difficult to compile Linux kernel.Compiling kernel needs to understand few things and then type a couple of commands.