I have a strange issue with Saucy, that cannot figure out. I usually patch the kernel with a well-known patch for Lenovo Mic Mute led. However since latest kernel updates, I've lost the header file
/usr/include/linux/thinkpad_acpi.h which is needed for the patch to compile.
As I see in kernel packages - the file should exist in linux-kernel-headers, but when I try to install it, I get the message:
Note, selecting 'linux-libc-dev' instead of 'linux-kernel-headers'
And in linux-libc-dev the file is missing. Can someone explain how and when linux-libc-dev replaced linux-kernel-headers, and why the header file
thinkpad_acpi.h is missing there?