This is a very long-standing problem for both the proprietary and Debian Nvidia drivers, legacy and current: When switching out of X (i.e. control/alt/F1), the console font is quite large and the lower half of each line appears doubled under the line. (In contrast, Nouveau gives a small screen font.)
Possibly, there is something, harmless to Xorg, that can go into xorg.conf to fix this?
