Hi all,

I have a few different types of mining going, mostly for fun, not really expecting much profit with the hardware I have.  One of the machines has an NVidia GeForce 8400 GS gpu.

After finally getting cudaminer installed and the drivers going, I have been experimenting with settings to see what kind of hash rates I can get.

I got fairly excited when I saw:
[2013-12-18 07:31:48] GPU #0: GeForce 8400 GS, 1003520 hashes, 122.66 khash/s

I am getting occasional errors:
[2013-12-18 07:32:13] GPU #0: GeForce 8400 GS result does not validate on CPU (i=62, s=1)!

But in general, it runs right around 120-130 khash/s.

The problem is that I never see a block get accepted.  I am mining a litecoin pool and it looks like cuda is using the scrypt algo.

Here is my current command line and what it shows on startup:

cudaminer -l L16x4  -o stratum+tcp://usa.wemineltc.com:3334  -u jplangan.cuda -p x -H 1 -i 0

           *** CudaMiner for nVidia GPUs by Christian Buchner ***
                     This is version 2013-12-10 (beta)
        based on pooler-cpuminer 2.3.2 (c) 2010 Jeff Garzik, 2012 pooler
               Cuda additions Copyright 2013 Christian Buchner
           My donation address: LKS1WDKGED647msBQfLBHV3Ls8sveGncnm

[2013-12-18 07:29:29] 1 miner threads started, using 'scrypt' algorithm.
[2013-12-18 07:29:29] Starting Stratum on stratum+tcp://usa.wemineltc.com:3334
[2013-12-18 07:29:30] Stratum detected new block
[2013-12-18 07:29:30] GPU #0: GeForce 8400 GS with compute capability 1.1
[2013-12-18 07:29:30] GPU #0: interactive: 0, tex-cache: 0 , single-alloc: 0
[2013-12-18 07:29:30] GPU #0: using launch configuration L16x4

Any suggestions?  Thanks in advance!

JPL

PS: OS is  Ubuntu 12.04.3 LTS (GNU/Linux 3.2.0-57-generic-pae i686)