[SOLVED] Windows 7 + Marvell LAN = High CPU Usage?

I'm trying out Windows 7 RC x64 on my computer and noticed it was showing outrageously high CPU usage at idle. Of course, first stop was task manager which points a finger at "System Interrupts". A quick Google search led me to suspect hardware. Through trial and error disabling components, I found the culprit: Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller

Here is task manager with it enabled, system at idle. All cores are showing usage, but cores #1 and #3 are totally unacceptable:


Here is task manager after disabling the Marvell LAN. CPU usage immediately flatlines on all four cores:


Just to verify, re-enabling the LAN causes CPU usage to go crazy again:


I've tried updating drivers, using many variations of both Microsoft and Marvell drivers with no luck. Is anyone else seeing this problem with the same Marvell LAN controller? Does anyone know of a fix?

I cannot verify whether the LAN is non-functional as I don't use a wired connection. I can just leave it disabled but having this kind of workaround bugs me.

Your not using it - just disable it and be happy..

Since you're not using the adapter, it's better to disable it anyway... it's taking up resources that could be freed up for other uses. One troubleshooting step I can suggest is to plug it into a router and see what happens. It's probably gobbling up CPU cycles attempting to obtain an IP address. Most likely a bug that will be fixed with newer drivers or when Win 7 goes RTM.

I have the same problem, but with XP and Marvell LAN.
The problem is solve to change the "HP Network Devices Support" service from Automatic in Manual

Regards

Claudio

I had the same problem with "Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller"
after updating the driver i played with parameters in the advanced tab of the driver (in the device manager ,network adapters).
and the probleme stoped/
try to limit the "max IRQ per sec" to 1000 insted of 5000.

SOLVED!

OK, I've lived with this problem since running Windows 7 RC1. I finally fixed it.

For anyone out there with the same problem:

Go to Device Manager>Network Adapters>[right-click] Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller>Properties>Advanced>Wake-Up Capabilities

Change the drop-down from "Magic Packet & Pattern Match" to "None" and the problem is solved.