Hello, someone can build the latest openwrt trunk with the lastest cgminer? (4.1.0)

Here you go, and given the bugfixes that went into 4.1.0, this might be one of the best firmwares ever, though it's completely untested.

http://ck.kolivas.org/apps/cgminer/avalon/20140309/

Ty.. This one seems a bit more HW % :S. And today morning i should power off, power on the PSUs to get them hasin`...

Check your cables. I am using the the newer firmware on my AVY1's and the HW% is lower than before.

Check what? I dont touched my unit, just flashed the FW

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It's your unit not the firmware.