Why LG GT540 after boot it disconnects with ADB Why when my phone LG GT540 is running and seen by ADB after bootup it disconnects (not from PC just from ADB, as PC still can see it it Device Manager) after few seconds after bootup sequence?

The problem is occuring only with GT540, tested other device - HTC - works fine.

The key could be USB drivers, but tried many of them official and handmade.

Also I've tried running phone in "Recovery" or "Safe" Mode - when LG firmware updated my phone via USB with no major problems with connection, hovewer I cant use ADB over this "Safe" mode, can't I?
Some people have had their device turn on the mass storage mode by itself.

Verify that you haven't enabled Mass storage only mode in Settings -&gt; SD Card &amp; storage -&gt; Mass storage only, then reconnect &amp; restart adb daemon.