Sorry Melmarker,
Tried to upgrade before I departed for the weekend. The exact error I get is;
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up glx-alternative-nvidia (0.6.91+nmu1) ...
update-alternatives: error: alternative link /etc/modprobe.d/nvidia.conf is already managed by nvidia
dpkg: error processing package glx-alternative-nvidia (--configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
glx-alternative-nvidia
for now I just put glx-alternative-nvidia on hold, and was able to upgrade the rest of my system without issue.