This is the my cpuminer:
cpuminer-gc3355 (v1.0e) - Started: [2014-05-25 22:47:27]
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(2s) | 0.00/0.00 MH/s | A: 0 R: 0 HW: 0
Connected to stratum.eminer.pl:3341 diff 1 with stratum as user ordenadoresatm.gridseed
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GSD 0: | 0 MHz | 0.0/0.0 KH/s | A: 0 R: 0 H: 0
GSD 1: | 0 MHz | 0.0/0.0 KH/s | A: 0 R: 0 H: 0
GSD 2: | 0 MHz | 0.0/0.0 KH/s | A: 0 R: 0 H: 0
GSD 3: | 0 MHz | 0.0/0.0 KH/s | A: 0 R: 0 H: 0
====================================================================================================================================================================================
[2014-05-25 22:47:27] 0: GC3355 chip mining thread started, in SINGLE mode
[2014-05-25 22:47:27] 0: Open device /dev/ttyACM0
[2014-05-25 22:47:27] 0: failed open device /dev/ttyACM0
[2014-05-25 22:47:27] 0: Terminating GC3355 chip mining thread
[2014-05-25 22:47:27] Starting Stratum on stratum+tcp://stratum.eminer.pl:3341
[2014-05-25 22:47:28] 1: GC3355 chip mining thread started, in SINGLE mode
[2014-05-25 22:47:28] 1: Open device /dev/ttyACM1
[2014-05-25 22:47:28] 1: failed open device /dev/ttyACM1
[2014-05-25 22:47:28] 1: Terminating GC3355 chip mining thread
[2014-05-25 22:47:28] 2: GC3355 chip mining thread started, in SINGLE mode
[2014-05-25 22:47:28] 2: Open device /dev/ttyACM2
[2014-05-25 22:47:28] 2: failed open device /dev/ttyACM2
[2014-05-25 22:47:28] 2: Terminating GC3355 chip mining thread
[2014-05-25 22:47:28] 3: GC3355 chip mining thread started, in SINGLE mode
[2014-05-25 22:47:28] 3: Open device /dev/ttyACM3
[2014-05-25 22:47:28] 3: failed open device /dev/ttyACM3
[2014-05-25 22:47:28] 3: Terminating GC3355 chip mining thread
[2014-05-25 22:47:28] API: Bind failed
[2014-05-25 22:47:28] Stratum detected new block
[2014-05-25 22:47:28] New Job_id: 34cd Diff: 1 Work_id: 7300beb2
[2014-05-25 22:47:35] Stratum detected new block
[2014-05-25 22:47:35] New Job_id: 138b Diff: 1 Work_id: 7307e8df
This is how I call the scrypt:
/opt/miners/cpuminer-gc3355/minerd -F 800 -G /dev/ttyACM0,/dev/ttyACM1,/dev/ttyACM2,/dev/ttyACM3 -o stratum+tcp://stratum.eminer.pl:3341 -u ordenadoresatm.gridseed -p grid
Pool does not show even the worker connected.