Doesn't really make sense since if it can talk to it, it will mine on it.
If it can't mine on it, then that would be coz it can't talk to it thus it can't tell it to turn the led off.
It is possible to enable/disable a device using the USB menu. I have sometimes slow nanofurys because of several reasons. To find them I disable and wait. Then I try to find the cold one. If the LED would be switched off, it would be much easier.
Disable doesn't currently turn them off, it just stops sending them work because the init sequence is involved and once they're running I try and not visit the init/shutdown code as the driver design assumes it will only ever be done once and prefers to just drop the device if it fails and lets it be hotplugged again if need be. I can revisit it.
actually I think we're talking about two separate features (that are missing in that sense) :
- Identify - the LED can be controlled independently of the device' power; Just flickering the LED would be sufficient for what rgr_rgr wants;
- power-off/on - main "power switch" (if we can call it so) within each NanoFury can also be flipped. This might be helpful when testing for possibly overloaded hub without having to physically remove the device.