linux-image-2.6.31-307-ec2 2.6.31-307.21 (amd64 binary) in ubuntu karmic

 This package contains the Linux kernel image for version 2.6.31 on
 x86/x86_64.
 .
 Also includes the corresponding System.map file, the modules built by the
 packager, and scripts that try to ensure that the system is not left in an
 unbootable state after an update.
 .
 Supports Generic processors.
 .
 Geared toward desktop systems.
 .
 You likely do not want to install this package directly. Instead, install
 the linux-ec2 meta-package, which will ensure that upgrades work
 correctly, and that supporting packages are also installed.