Question: Is there any way to get the emulator work normally ?
Its still very slow and useless, I tried adjusting the cache size and Ram.
My system configuration is quite good, are there any tips and hints to speed up the avd ?

Answer: 
Ajay,

I wasn't able to find anything specific to just "USB Connected," but there are a few Broadcast Actions that may be of interest in this case depending on what you are trying to accomplish:

* [`ACTION_MEDIA_SHARED`](http://developer.android.com/reference/android/content/Intent.html#ACTION_MEDIA_SHARED): External media is unmounted because it is being shared via USB mass storage.
* [`ACTION_UMS_CONNECTED`](http://developer.android.com/reference/android/content/Intent.html#ACTION_UMS_CONNECTED): The device has entered USB Mass Storage mode. This is used mainly for the USB Settings panel.
* [`ACTION_UMS_DISCONNECTED`](http://developer.android.com/reference/android/content/Intent.html#ACTION_UMS_DISCONNECTED): The device has exited USB Mass Storage mode. This is used mainly for the USB Settings panel.

There doesn't seem to be a Broadcast Action specific to USB simply being plugged in, you could also try doing something with:

* [`ACTION_POWER_CONNECTED`](http://developer.android.com/reference/android/content/Intent.html#ACTION_POWER_CONNECTED): External power has been connected to the device.

But this would go off for both USB connected to a computer and USB connect ONLY to a power source...

Interestingly, I also found this [LINK](https://groups.google.com/group/android-developers/browse_thread/thread/771f07ead3c635c5) simply stating that there was no Broadcast Action for "USB Connected".

You may be out of luck in this case :-\
Since: API Level 5
An activity to run when device is inserted into a car dock. Used with ACTION\_MAIN to launch an activity. For more information, see UiModeManager.
Constant Value: "android.intent.category.CAR\_DOCK"
public static final String CATEGORY\_CAR\_MODE

Since: API Level 8
Used to indicate that the activity can be used in a car environment.
Constant Value: "android.intent.category.CAR\_MODE"