If by "change the kernel" you mean pick the backup one in the boot menu, that should almost never been needed but tech support can walk you through it.
If you mean something else, you never need to do that as a normal user.
Hardware just not working happens on other operating systems too, it just sucks. But normal people aren't swapping out important parts so at most some USB thingy doesn't work.
If you mean something else, you never need to do that as a normal user.
Hardware just not working happens on other operating systems too, it just sucks. But normal people aren't swapping out important parts so at most some USB thingy doesn't work.