Interesting you asked. I used the nvidia-current driver. However early this morning, I uninstalled and tried the 304 experimental. Same problem with not saving the brightess, contrast and gamma settings. When I rebooted the machine later this morning, my OS was pretty much tanked, with mouse freezes, panel disappearing, unable to move frozen windows, all signs of a video problem. Fortunately I have a second drive in this machine with Zorin 5.2 (ubuntu 11.04) which works flawlessly, so I booted into that and that's how I'm typing this. No video or any problems BTW, same machine, same hardware. I might as well add that I had a really tough time installing Mint. First time I tried the 64 bit Mate version things ran very slow. Tried again with the Cinnamon 64 bit version, but my drive would not take the ext4 formatting, so after 3 or 4 attempts I used Reiser and it installed. I later read there are some serious problems with ext4 format in Ubuntu 12.10 which is still the foundation for Mint which makes me wonder whether 14.1 can be truly stable until there are major fixes to 12.10.