It WILL break multimedia left on its own, ioctl codes differ from those in stock kernel. That is why I put several userland libraries in the zip. Using them as replacements should allow existing functionality not to be broken. Do not put this patch in release even in extras-devel until I am ready with other packages. And after that you will have to make KP depend on them. I put the patch here so you and maybe some other brave souls to test if it does not lead to some unexpected results (i.e battery life, connectivity, what else?). Re diff for .config file - I will do it as soon as I have time.