I just installed LMDE 64bit on a new Dell desktop (dual boot with W7). Except for the fact that I have to add "i915.modeset=0" at boot time to avoid getting a black screen, the installation went fine. There is a resolution problem, however. I'm only getting 1280x1024 when Windows 7 gives me 1920x1080. The desktop comes with an integrated Intel card and an nvidia GeForce GT 525M. First I looked for /etc/X11/xorg.conf to try and add the correct resolution but the file wasn't there by default. So I tried installing nvidia drivers per this post's instructions: http://forums.linuxmint.com/viewtopic.php?f=191&t=82424
up until blacklisting the nouveau driver, but after restarting I can no longer see the graphic desktop, only console mode. From here I tried modifying some options in the new xorg.conf but nothing seemed to work. The only way I could see X again was to remove/rename the xorg.conf file. I tried removing the nouveau driver completely but I got the same result.
I also tried this post: http://forums.linuxmint.com/viewtopic.php?f=42&t=44871&start=0
I get "Fatal server error: server is already active for display" and I don't know where to go from there.
In case it's worth mentioning, after installation I updated to Update Pack 3 from Pack 2. I followed the steps above in both scenarios (both Pack 2 and 3, same result). And I have kernel 2.6.39-2-amd64. Also, I just came across this post: http://www.grputland.com/2011/12/ubuntu-1204-alpha-1-sandy-bridge.html
. It refers to Ubuntu and the problem seems to have no immediate solution.
I still look forward to someone who may have overcome a similar issue, hopefully. Other than guessing, I'm out of options to try. Like the last post says, maybe I'll just have to wait with a new desktop I can't fully use at the moment.