to rebuild the module (probably check also whether the -16
version of linux-headers is installed). If that is successful,
then we have to see whether there are still upgrade logs around
for that failed update and whether this gives a clue what went
wrong.
My educated guess in this case would be that DKMS for whatever
reasons (yet to find out), compiled the -16 module with the -15
kernel headers.
You might try a
sudo dkms remove -m drbd8 -v 8.3.3 -k 2.6.31-16-server
sudo dkms build -m drbd8 -v 8.3.3 -k 2.6.31-16-server
to rebuild the module (probably check also whether the -16
version of linux-headers is installed). If that is successful,
then we have to see whether there are still upgrade logs around
for that failed update and whether this gives a clue what went
wrong.