any body help me?
i using laptop. i set many line commond for cudaminer but dont working:
I wouldn't even bother trying to figure it out, to be honest. What is an 8400M going to get you in an ideal scenario, like 15 khash? It won't even come close to paying for the power, and to make it worse you're probably reducing the lifetime of a part that's already old and well used by now because it's in a laptop.
You are right!

ok thnaks bro
FYI for giggles, I got an 8400M GS going with these settings:
cudaminer.exe -i 0 -C 1 -H 2 -l L2x2
...for an amazing
0.9 kHash/second

Also if you value your laptop you shouldn't use that GPU for mining. Search for "Nvidia G84/G86 Chips Defective" to see what I mean.
has anyone noticed any performance changes running under linux vs windows?
i have so:
550Ti
Linux kernel-3.11 x86_64 cudatoolkit-5.5
90-92 kHWin7x64
72-76 kHOdd I'm only getting 74 kHash/sec on a 550 Ti hosted on Linux. Then again it may be because I have it running attached to motherboard so old it has DDR2-667 and PCI-E 1.1...