CyanogenModXT720/android_packages_apps_Usb — comment on commit 057a6f094de833e35f06261e4aa6de0b0bb0d19e
File:  line 0
By fjfalcon:

Well, are you using cm 7.2 or still on 7.1 build? Try to update all and get more info about it.

On last 7.2 build i get usb.apk crashed... and after that crashed systemui.
That was on problem.
Also, i explored about uevent and kernel.
Quarx recomended to write module for usbnet_enable(defy has that in kernel... but how to build module i don't know, i have love experience at c/c++ lang. .