HP Envy Does Not Always Detect Atheros AR8151 Adapter

[j1312g]

I recently purchased an HP Envy 17 and typically use the wireless connection.

When backing it up to my home server, I perfer to plug an ethernet cable into the Atheros AR8151 adapter.

The issue I'm having is that nothing happens when I plug the cable into the jack.  In fact, the adapter is not displayed in Device Manager.

I have to restart the computer about 4 times before the lights for the adapter begin flashing and then the adapter appears in Device Manager and I can actually use it.

The driver date is 1/16/2012 and the version number is 2.0.12.13.

My BIOS version is F.06.

Any ideas on why this happens?

Thanks.

[mithcd]

There might be a duplex mismatch here. Try setting your LAN adapter to 10Mbps/half duplex. Hopefully this will do the trick. 

[j1312g]

Thanks.  I'll give this a try and see what happens.