i didn't try... but if i disable the console framebuffer i can jump between X and console without anyproblems...
maybe the nv driver don't like the console framebuffer?
Video Card: ASUS 8200 geforce3 ti500
Driver Version: 5328
Linux Dist.: Slackware 9.1
Video BIOS: 03.20.00.18.00
CPU: AthlonXP 1800+