Reviving an old thread here. Apparently PHC is no longer available (or not supported on 3.0+ Kernels).
Please see below and if you can help me, I would really appreciate it. For those who read this and cannot assist me, thank you as well for your time. =)
Same / similar error appeared before and I did update -f, which I thought fixed it. It did not.
$ sudo apt-get install linux-generic-phc linux-headers-generic-phc
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
linux-headers-generic-phc : Depends: linux-headers-3.2.0-25-generic-phc but it is not going to be installed
E: Unable to correct problems, you have held broken packages.