Internet Connection comes and goes
I have dual-boot system with two hard drives, Windows XP (32-bit) on one and 7 RC (64-bit) on the other. I use BIOS Setup to select which to boot on. No problems connecting to the Internet with XP. When I first installed Windows 7, there appeared to be no problems. But now when I boot into Windows 7, I usually have no Internet connection. I ran the troubleshooter, but it found nothing. Help on this topic tells me to check cabling, lights on the modem, etc., all of which clearly is not relevant here. I have the McAfee Windows 7 beta package installed. I tried disabling the firewall - no help, also checked the Network connection (Marvell Yukon ethernet controller, built into motherboard) in Device Manager - said it was working properly. I am using Comcast with a Motorola Cable modem. With XP, I had to install a driver for the Marvell Yukon controller to get any connection at all, but with Windows 7, it worked fromthe very beginning with whatever drivers MSoft supplied.
June 18th, 2009 7:32am

One more thing: this is a hard wired connection to the cable modem, no wireless involved with the dual-boot desktop (though the modem does have an antenna that I use to connect to my laptop).
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June 18th, 2009 7:33am

Can you try the latest driver from the manufacturer's website?
June 18th, 2009 5:11pm

Thank you for your reply. I took you advice. I downloaded the latest driver from the Asus website (the Marvell Yukon came with an Asus motherboard). This is a 64-bit driver that appears on their web page when you select Windows 7 64-bit. I think it's a beta version. Immediately after installing the driver, Internet connection was restored, but it went away again when I rebooted. Since then it has been intermittent. I noticed that when I bot up, the hourglass (or whatever they call that cycling thing that replaced the hourglass) appears on the Network icon on the task bar (lower right) for a while, then is replaced by the exclamation point indicating a problem. BUT just now I was able to get the Internet connection working again by going into Device Manager and first disabling and then Enabling the Network Adapter. Also this motherboard has two network adapters, of which I only need one. Some time ago I disabled one in the BIOS so that XP would not keep notifying me that I had no network connection through that port. Now I'm wondering if enabling both of them, or switching the ones that are disabled/enabled, might help. This certainly looks like a problem with the OS or the driver. I don't know why the Troubleshooting could not be more helpful. Every time I have tried it, it "thinks" for quite a while and then comes up with nothing.
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June 19th, 2009 2:48am

It now looks like I can definitely restore my Internet connection by going into Control Panel/Device Manager and disabling and then re-enabling the network adapter. Obviously I should not have to do this every time I boot up. Hopefully the problem (which must be in either the OS or the device driver) will be resolved soon.
June 19th, 2009 6:11pm

I am also having trouble with my Yukon Marvell adapter. My board, also an ASUS, has the Yukon and an nVidia adapter. I had a little trouble with nVidia adapter, but every time I boot, I have to unplug both ether net wires from the adapters, then plug the Yukon in, wait for it to connect, then plug in the nVidia adater.It seems there maybe a problem with W7 and the Yukon adapter on ASUS MBs.Either there was an update that fixed this issue or by wiping W7 and reinstalling it with the adapters' MAC set to static in the router fixed it. I leaning towards the former only because I has to unplug the LAN wire from both and then plug the Yukon in first, wait for it to connect, then plug in the nVidia for both to connected properly for several boots into W7. Now every boot into W7 both adapters have connected without a problem.
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July 14th, 2009 8:41am

Thank you for your reply. I took you advice.I downloaded the latest driver from the Asus website (the Marvell Yukon came with an Asus motherboard). This is a 64-bit driver that appears on their web page when you select Windows 7 64-bit. I think it's a beta version. Immediately after installing the driver, Internet connection was restored, but it went away again when I rebooted. Since then it has been intermittent.I noticed that when I bot up, the hourglass (or whatever they call that cycling thing that replaced the hourglass) appears on the Network icon on the task bar (lower right) for a while, then is replaced by the exclamation point indicating a problem.BUT just now I was able to get the Internet connection working again by going into Device Manager and first disabling and then Enabling the Network Adapter.Also this motherboard has two network adapters, of which I only need one. Some time ago I disabled one in the BIOS so that XP would not keep notifying me that I had no network connection through that port. Now I'm wondering if enabling both of them, or switching the ones that are disabled/enabled, might help.This certainly looks like a problem with the OS or the driver. I don't know why the Troubleshooting could not be more helpful. Every time I have tried it, it "thinks" for quite a while and then comes up with nothing. If this is an ASUS board with the Yukon and nVidia adapters, then the nVidia is the one you want to use if you are only connecting one wire. I have both of mine plugged in and now they work fine (guess there was a patch or I stumbbled onto the right settings some how.
July 22nd, 2009 1:08am

hi I started a similar thraad a while back here http://social.technet.microsoft.com/Forums/en/w7itpronetworking/thread/56b77597-505b-4358-b37a-276d9efc0d7a and i have to do the same thing i have to get up the network adapter properties and disable one of the features then my connection comes on then after restarting the computer, no connection so i have to re-enable it to get it to connect again i never received any response from a "mod" so i'm sure that they "DO NOT" have a clue how ti fix the problem my adapter is VIA Rhine II so it's mot just yours They are obviously alot of other network problems for other people too one can only hope they will one day all be resolved especially before windows 7 actually goes to market
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July 25th, 2009 6:32am

After a wipe and reinstall, mine started working. It now "locks on" every boot. Not sure if it was the wipe, setting static IP in the router or a combination of the two, but so far so goood. Now if I can fix the boot into XP everything will be pretty good. Every time I try to boot into XP it restarts my system. Guess that's better than having to leave the install dvd in the drive all the time.
July 25th, 2009 7:14am

Well I been playing with Safe Mode in Win7 And it connects to the internet "Everytime" It just wont connect in normal mode, without me play around with the setting
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July 25th, 2009 8:26am

You have dual LAN or single? I was just unplugging the wires (dual) and then plugging one, waiting for connection, then plugging in the other. Have you tried setting static IP on the router to your PC's MAC?
July 25th, 2009 10:22am

From the comp. it's single. I plug it into a router/modem that is Already connected to the internet, with another comp. on it. nope haven't tried setting a static IP on the router (haven't done that before will have to look it up) thanks
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July 27th, 2009 12:12pm

Hi, The same thing happens to me...At first, I thought that it was the network...so I unplugged the network cable couple of times, to see that it was not the problem...The switches and optical media equipment are powered from my apartment, so I unplugged that, too (:devil:) causing the whole neighborhood to go offline for a few minutes. After that I switched to Wireless LAN (after a good deal for a wireless router on the flea market) and that did the same. So this behavior happens the following way: - I switch on the computer - I log in - after I logged in, I learn that the connection is not working - I open the status dialog of the active network connection to see that there are no packages received nor sent - after 1 minute and 40 seconds of inactivity, the connection comes to life. If I tried connecting to a website using the browser during these 1 minute 40 seconds, I would get connection errors from the browser in the next few minutes, until the dns cache clears out. Any ideas?
July 27th, 2009 2:15pm

Csongi Yours might be the IPv6 problem. From my experience in Eastern Europe, the network set up sounds similar to what you described. Most likely it is not up to IPv6 standards and is taking longer to connect. I had to set static IP on my routers because the main one is not IPv6 compatible. Whether that is why it finally works right or not I can't be 100% positive, but since I did that it's been connecting every time I log onto W7. my problem was also slightly different since my MB has two built in ether net ports. There also seems to be a problem with older ether net ports working with the IPv6 standard. I also learned not to disable the IPv6 because it makes the problem worse. Without better advice, setting a static IP for the computer's MAC seems to work for me.
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July 27th, 2009 2:30pm

The problem appears to have gone away. I have had no Internet connectivity problems lately. Presumably this is due to one of the Windows updates that have been automatically installed. In any event I am happy. My motherboard is an Asus P6T Deluxe V2 - which handles Intel i7 chips, so it's fairly new. According to the BIOS Setup, both networking ports are Marvell Yukon.
August 8th, 2009 1:11am

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