Re: Is it possible to install Xubuntu 12.04 then update to kernel 3.11?
In my opinion, you are juggling with fire here, but hey, if you are fully backed up on both OSes and have your Windows install disks/licenses/activations handy, then why not? Part of the fun in Linux is the experimenting.
I must inform you that your install method will not give you kernel updates. Therefore, you will go unpatched and be at risk with new security exploits on your kernel unless you keep track of kernel updates manually and go through the same custom kernel rigmarole each time. I trust that you are aware of the fact that Ubuntu takes no responsibility for the security of PPAs. You must carefully research what you are doing and make sure that you trust the PPA. I posted this thread some days ago summarizing Linux security.
However, you are making your kernel installation process needlessly complicated. Just add the PPA to your software sources. If the PPA is well maintained, then this should give you automatic updates and you will have one less worry than your current method. Here is a link showing you how this is done.
For what it's worth and speaking only for myself, I would never install a kernel that comes from anywhere outside the main Ubuntu repositories unless I compiled it from source myself. The reasons are in the link already alluded to, so consider yourself warned.
Newb: How far must I jump to clear the ledge halfway down?
Guru: It's bad to jump off cliffs. Let's look at better options.
Newb: Stop harping about "best practices" and just let me jump.