Internet connection lost after sleep - Ethernet

Question

Level 1

5 points

Internet connection lost after sleep - Ethernet

I have just started using a new router (a Linksys). My problem is that after the iMac comes out of sleep I cannot get an internet connection using ethernet. It is not the router, a PC connected at the same time does not lose its connection and the internet light on the router stays lit.

When I lose the connection I cannot access the router's web page @ 192.168.1.1. The admin login box appears but with a name that relates to a previous router I used. I assume that this is part of the problem.

Any ideas?

iMac, Mac OS X (10.6.2)

Posted on Dec 8, 2009 9:01 AM

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Answer 1

luvlabs

Level 4

3,620 points

Dec 8, 2009 5:02 PM in response to gthull644

Go into System Preferences > Network and make sure that 1) Ethernet is the first network checked; 2) Click on the Advanced button and make sure network settings are correct. Click on the the Ethernet tab and make sure it is set to automatic.

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Answer 2

gthull644 Author

Level 1

5 points

Dec 9, 2009 3:56 PM in response to luvlabs

Everything seems OK. I have made various changes to try to resolve: created a new ethernet location, created a new location, used a manual IPV4 setup, turned IPV6 off. Nothing works.

I do get a connection eventually but I'm getting p **d off.

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Answer 3

luvlabs

Level 4

3,620 points

Dec 10, 2009 5:02 PM in response to gthull644

You might want to lug it into the local Apple store and have a Genius take a look at it. You could have a bad network card.

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Answer 4

Pinthea

Level 1

20 points

Dec 10, 2009 5:35 PM in response to luvlabs

Had the same problem on my first i5. Only a reboot would fix it. Of course when I went to the Genius bar, after waiting 2 days for the appointment, it worked fine and they thought I was being a complainer or picky or something -- the various times the Genius tried to put the i5 to sleep and wake it, the wired ethernet worked perfectly. But I pressed and insisted on a return/refund which I managed to get without the restocking fee. They did it begrudgingly, I assure you...

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Answer 5

Dec 11, 2009 6:43 AM in response to Pinthea

I'm having the same problems on a new 27". Usually after coming out of sleep or being powered on. Today when moving to a new router, it took hours to get a connection, to the point where I was starting to think the new router was faulty. Have tested the cables, ports etc, so I think there's either a bug or the network card is faulty.

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Answer 6

beaumoj

Level 1

1 points

Dec 13, 2009 1:03 PM in response to mikeadams

I have the same problem with my new i7. My router, a time capsule, is not the problem since my other iMac (a late-2006) has no such issues, nor does my macbook. It doesn't always happen, but often enough to be a real pain - all network connectivity is gone. The only workaround I've found is to turn ipv4 off in System Preferences -> Network and then turn it back on again. I am only using Ethernet. Anyone else having this problem?

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Answer 7

gthull644 Author

Level 1

5 points

Dec 13, 2009 1:46 PM in response to gthull644

Since changing the IP address of the router (the Gateway IP) my problem has gone away (touch wood). I doubt if this is a cure for anyone else but so far all is well.

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Answer 8

Dec 14, 2009 11:12 AM in response to gthull644

Same problem here with my 27" i7. After waking from sleep, Ethernet connection is lost about one out of five times. Disconnecting the Ethernet cable and re-connecting it fixes it. Ethernet is connected to Gigabit Airport basestation, which is connected to cable modem. Extremely annoying!

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Answer 9

8Adam8

Level 1

0 points

Dec 17, 2009 11:41 AM in response to gthull644

Same problem here. I think it's a problem with Snow Leopard. Every single time my computer wakes from sleep it takes anywhere from a few seconds to a few minutes for the computer to connect to the internet. I seriously doubt it's a router problem. I never had this problem with earlier versions of SN/Panther or my equipment. Hopefully Apple is listening and hopefully there is a software patch for the problem!

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Answer 10

8Adam8

Level 1

0 points

Dec 17, 2009 11:44 AM in response to gthull644

Notice how everybody on this thread is using 10.6.2?!

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Answer 11

luvlabs

Level 4

3,620 points

Dec 17, 2009 4:52 PM in response to 8Adam8

I've never seen this problem with either one of my SN iMacs and my Belkin N+ router. As soon as they wake up, they are connected.

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Answer 12

8Adam8

Level 1

0 points

Dec 17, 2009 11:20 PM in response to gthull644

I don't know then. It just seems really bizarre.

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Answer 13

beaumoj

Level 1

1 points

Dec 17, 2009 11:26 PM in response to 8Adam8

I have 2 iMacs, a late-2006 17" and a new core i7 27" - both running 10.6.2. The 17" one does not have this problem, only the 27" and, as someone earlier said, only about 1 time in 5. Which models are other people having this problem with?

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Answer 14

Dec 18, 2009 10:11 AM in response to beaumoj

I am having this problem with a new 27" core i7 iMac.

I am not having the problem with a 24" Core 2 Duo iMac from 2008.

Both are running Mac OS X Snow Leopard 10.6.2.

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Answer 15

Dec 20, 2009 4:36 PM in response to gthull644

I'm having the same problem with my 20" iMac running Leopard (10.5.8), so the problem isn't limited to SL users. I generally restart my modem at least once to get the connection back. I just set 'Configure IPv6' to Off based on advice on a similar thread, so we'll see how that works. I'll post back if it does (and probably come back to whine if it doesn't).

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