[Pkg-dkms-maint] Bug#579179: dkms: should module source be cleaned before autoinstall?

[Michael Gilbert]

package: dkms
version: 2.1.1.2-2
severity: important

i've been testing kernel upgrades, and found that some dkms packages do
not rebuild their modules on an abi bump.  they use the previous
build, which seems a bit dangerous to me.  should dkms force a clean of
the module sources before autoinstalling?

to reproduce:
$ sudo apt-get install linux-image-2.6.32-3-amd64 linux-headers-2.6.32-3-amd64
$ sudo apt-get install fglrx-modules-dkms
$ sudo apt-get install linux-image-2.6.32-4-amd64

the fglrx module will be copied from the 2.6.32-3 build, rather than rebuilt
during autoinstallation.  note that linux-headers-2.6.32-4-amd64 is missing,
so i was expecting an error.

mike