Two versions ago (starting with 3.13.0-166) the former linux-image-extra-* packages have been renamed to linux-modules-extra-*
I do not see any provision for these in /etc/apt/apt.conf.d/01autoremove and 01autoremove-kernels on my trusty system (apt 1.0.1ubuntu2.23), and indeed "apt autoremove" deleted the linux-image-extra package belonging to the "running kernel minus one" kernel version.
What about packages like
linux-modules- extra-3. 13.0-168- generic
Two versions ago (starting with 3.13.0-166) the former linux-image-extra-* packages have been renamed to linux-modules- extra-*
I do not see any provision for these in /etc/apt/ apt.conf. d/01autoremove and 01autoremove- kernels on my trusty system (apt 1.0.1ubuntu2.23), and indeed "apt autoremove" deleted the linux-image-extra package belonging to the "running kernel minus one" kernel version.