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  • I've already seen that answer, bu it is too techy. What do you mean by "extra packages"? You mean manually installed? And what does it mean "kernel modules which are outside of the normal kernel source"? Commented Jul 28, 2015 at 11:53
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    Extra packages mean other software which you've installed. Some packages, like VirtualBox, need to interact with the kernel, and so install modules into the kernel to enable them to run. When the kernel is updated, the packages module may not work anymore, or may be overwritten. DKMS ensures that if there are any modules loaded into the kernel by supplementary packages, they are dealt with appropriately when the kernel updates, and the software continues to function. Commented Jul 28, 2015 at 13:12