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Mar 30, 2011 2:15 PM in response to cgoyetteby Couchcowboy,Still same old c---. I'm now not sure if switching user locations makes a difference or not. It seems to be purely random on when my iMac will connect and when it won't. I also leave Time Machine off and still have this constant problem. I tried increasing my DHCP lease to 365 days and it didn't make any difference; iMac connects upon awakening occasionally, most times it does not. Interestingly, switching users sometimes gives me a "yellow" light (after re-sleeping and re-waking) and states, "No IP Address", "Unknown State, The status of your network connection cannot be determined", yet connects to the internet just fine.
I've had Macs for 20 years and all the problems I've had with this iMac (see my other posts elsewhere) have created the worse experience I've ever had. I've always had Mac Pros in the past, but since Apple seems determined to never make a mid range mac without monitor, and since I can no longer afford the Pro, guess I'm stuck having to use this All-N-One. -
Apr 2, 2011 10:42 AM in response to Couchcowboyby Grmborg,Shutting off the Time Machine didn't solve the problem unfortunately. It's like connecting ad random, but when it's connected to the internet it's stable. iStumbler is measuring a constant 70%.
Sometimes even a reboot doesn't help. I'm considering a powerline-connection now, because this is becoming frustrating.
The solution? My gut-feeling tells me it's something to do with firmware. -
Apr 4, 2011 10:43 PM in response to gthull644by brandonc,I've been having the same issue on my home network with an iMac and new MBP on a Verizon Westell router. I suspect it has something to do with DHCP and the presence of iPhones on the network, since the problems began not long after installing the iOS 4.3.1 update. If you recall from this time last year, the original iPad had a network-crippling DHCP issue, resulting in its (temporary) ban from Princeton and other university campuses:
• Original problem description (solved with iOS 3.2.1 update): http://www.net.princeton.edu/apple-ios/ipad-iphoneos32-stops-renewing-lease-keep s-using-IP-address.html
• Issue reappears in iOS 4.1 – 4.3.1:
http://www.net.princeton.edu/apple-ios/ios41-allows-lease-to-expire-keeps-using- IP-address.html
• Princeton's workaround:
http://www.net.princeton.edu/apple-ios/ios41-allows-lease-to-expire-keeps-using- IP-address-workaround.html
I haven't tried Princeton's workaround yet, but I have a pretty good feeling it'll work since they seem to know exactly what's going on. Why this hasn't been cross-posted here I cannot understand, but hopefully these links will help some of you. Good luck! -
Apr 5, 2011 9:58 PM in response to brandoncby marcus.sg,Adding my voice here too. After sleeping overnight, Safari and Mail lose their ability to connect to the internet, yet Camino and FFX work fine. But I don't use those browsers very often, and I always have a ton of tabs and windows open so having to reload those is a pain as I have to restart the entire machine. I'm beyond over this issue. It's an OS level problem as the only affected programs are those supplied by Apple. I use mail.app for my mail and check my RSS through feeds setup in Safari, so I would REALLY like a fix for this soon Apple... -
Apr 6, 2011 7:01 AM in response to brandoncby Couchcowboy,Thanks, brandonc! Great articles! I'll turn off all my iOS devices to see if that makes any difference in my iMac connecting. Would have never considered that the problem may be with our iPhones or iPad.
Also, has anyone read this nice article by Topher Kessler or tried this possible solution?
http://reviews.cnet.com/8301-13727_7-20050793-263.html?tag=contentMain;contentBo dy
I'm not at home right now, so can't try it myself. -
Apr 7, 2011 7:22 AM in response to Couchcowboyby cgoyette,brandonc and Couchcowboy -
Thanks for those links... I tried the Topher Kessler Firewall pref solution but no dice here. Same Ethernet drop after sleep.
I picked up a new MBP, swapped drives, reinstalled 10.6.7... and I still have the Ethernet drop issue. My other MBP connected via AirPort does not drop it's network connection.
I'll try the new MBP connected via AirPort overnight and see how that goes. I'll also give the iOS tweaks a shot, we do have an iPad that hangs out in the den. -
Apr 8, 2011 2:35 PM in response to gthull644by Grmborg,I stopped using AirPort, but the problem still exists when using an Ethernet-connection. Diagnostics keeps giving me 2 orange lights: internet and server. And then all of a sudden the connection is functioning all right for a while, but how??
I don't use a firewall and don't have an iPad, so the above mentioned solutions won't do the trick. I did try changing DNS and DHCP settings on my router: nothing. The Apple support pages were leading me through a swamp of disinformation.
Strange thing is I don't have any connection troubles when using Windows 7 (installed by bootcamp). -
Apr 10, 2011 3:20 AM in response to Grmborgby Grmborg,The guy from Apple support suggested me there could be a conflict between non-Apple software and Mac OS. So I decided to uninstall Flip4mac, MacFuse, Growl, startupsound prefpane and Open Office. 24 hours later it keeps going well.
Has anyone else tried to do this? -
Apr 12, 2011 3:14 AM in response to Grmborgby pezavy,The TimeCapsule-AirPort provides the local wireless internet (for iPhone, laptop) continuously. No problem with that. My iMac connected to the TimeCapsule with network cable (it is much faster than wifi). When the iMac goes to sleep and I wait 30-40 min (usually I hear "clicking sound" after 20 min) and try to connect to the iMac using LogMeIn (from iPhone or laptop) the LogMeIn says my iMac is not connected to the internet or not turned on. When I wake up the iMac (e.g. with my mouse) there is no active internet connection for seconds (checking e-mail is spinning for 3-4 sec or the LogMeIn icon is grey in menu bar) and after few seconds I hear a "clicking sound" when something is turning on in my iMac. After that "clicking sound" I have internet connection again on my iMac.
My settings:
iMac27: OSX 10.6.7
TimeCapsule - AirPort Utility version 7.5.2
Internet
Internet Connection - Panel Option
Connect using: PPPoE (ISP instruction, "Ethernet" does not work)
Connection: Always On
Disconnect if Idle: Never
AirPort
Wireless Network: Create a wireless network
Radio mode: Automatic
Radio Channel Selection: Automatic
Wireless Security: WPA2 Personal
iMac27 System Preferences:
Time Machine: Turned off
Energy Saver:
Power:
Computer sleep: 12 min
Display sleep: 10 min
Put the hard disk(s) to sleep when possible: ON
Wake for network access: ON
Allow power button to put the computer to sleep: ON
Automatically reduce brightness before display goes to sleep: ON
UPS:
Put the hard disk(s) to sleep when possible: ON
Slightly dim the display when using this power source: ON
All "Wake On LAN" option is turned on in my iMac, AirPort, LogMeIn client. I have Firefox 3.6.15 and the LogMeIn plugin disabled (other blogs pointed on that). Growl and Growl Mail turned off, Flip4Mac removed. The "Wake On LAN" is turned on in the LogMeIn preferences on the iMac.
No clue why I can not wake up iMac remotely with LogMeIn after it went to sleep... Just the UPS is connected to the iMAc (no change if UPS was removed from iMac as well). When the iMac went to sleep the wifi internet works permanently (as I expect from the TimeCapsule-AirPort) without any problem.
As I remember in OSX 10.6.4 or so I could wake up my iMac using LogMeIn from other devices. Does anybody have something similar behavior or possible solution? Thanks. -
Apr 14, 2011 8:22 AM in response to Grmborgby jjgaz,Grmborg
I have had the problems from day 1 - straight out of the box with no non-Apple software installed.
Or rather day 1.1 as everything was fine straight out of the box but when I ran the software update to get 10.6.6, thats when the problem started. Had hoped that 10.6.7 would have a fix but no.
Sent iMac back and got replacement from Apple but still same problem.
Took new iMac into Apple store for "Genius" to look at and it worked fine with their network. Ran diagnostics and no faults found. Tried all the tricks and work-arounds but to no effect. He suggested it may be a problem with my cordless phone interfering with the connection (?) and suggested I move this away from the wireless router. However, needless to say, this had no effect.
I need a back-up drive so am tempted to buy a Time Capsule as the theme seems to be that there is no loss of connections with Apple gear but it's an expensive fix.
Everything else works fine - G4 Powerbook, G4 iMac, iPad, iPod Touch, numerous Windows laptops, Wii it's only the 27" that drops the connection. -
Apr 15, 2011 1:41 PM in response to jjgazby pezavy,jjgaz
Sounds pretty frustrating. I have Time Capsule and my iMac27 looses the internet connection after it went to sleep… I can not wake up remotely (Wake On Lan turned on). Apple gear is not a guarantee for this.
After read the posts I concluded that the ultimate test would be a systematic - very boring and frustrating - sequential installation process to figure out when iMac looses this feature. Starting with the Leopard DVD coming with my iMac27. My data regularly saved so I could do that. But I am not very happy to do that. It is a kind of pain in the ***.
I should check the "Wake On Lan" feature before every update. The small utilities like Growl, Little Snitch, Skitch, LogMeIn should not kill the "Wake On Lan" feature of OSX 10.6.7, at least I would not expect that.
As I remember LogMeIn worked under Leopard and I could wake up my iMac remotely after it went to sleep. That time when I updated Leopard to Snow Leopard I remember wake up worked with LogMeIn. Currently not.
Really no idea what I should do to avoid this sequential "test" installation on iMac27. I just simply want to use LogMeIn to connect to my iMac when I am out of home. It worked some time ago… My MacBookPro with the pretty same OSX and programs works fine and I could wake up remotely...
Suggestion? Ideas? Thanks -
Apr 24, 2011 12:22 PM in response to gthull644by stevenfromvancouver,I see that I am not alone.
I have an all Apple set up--iMac, Time Capsule, airport expresses. The lost internet connection after sleep phenomenon started about a month ago, and is indeed becoming very tiresome. I do dutifully download software updates as they become available.
I will avoid having the computer go to sleep, but I do hope that Apple fixes this problem. I won't waste any more time looking for a fix!
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Apr 25, 2011 9:08 AM in response to gthull644by stevenfromvancouver,It looks as if there is a simple fix for this annoying problem. Basically, it is resetting the PRAM and the NVRAM.
See support note:
http://support.apple.com/kb/ht1379
I found this out from Apple support. The note does not say this, but I was asked to have the machine entirely disconnected from other devices when I did this reset and to unplug the iMac itself for 15 sec before starting this procedure.
In addition, in System preferences - energy saver I was asked to uncheck "Put the hard disk(s) to sleep when possible" and to check "Wake for network access" .
It has worked like a charm. In fact a certain balkiness in calling up some URLs seems to have disappeared. Safari is working better than it has for a long time. (I've had my iMac for a long time, so I suppose that some of these setting have become corrupted over time.)
You might also check to see that your screen saver is not clashing with your energy saver settings.
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May 5, 2011 4:18 PM in response to stevenfromvancouverby Couchcowboy,stevenfromvancouver,
Not sure how long you've had your Mac (you said a long time), but the Apple support link you provided states, "Unlike prior versions of the Mac OS, Mac OS X does not store network settings in PRAM. If you experience a network issue, resetting PRAM will not help." Are you still using OS 9?
couchcowboy
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May 5, 2011 5:38 PM in response to Couchcowboyby stevenfromvancouver,Couchcowboy,
The operative fact here is that, while this fix seemed to work--did work--for a day or two, the problem soon returned. Or maybe it never really left, but something that I did while doing all the things the Apple rep told me to do helped, but then stopped helping.
Whatever. I am no closer to having a solution to this problem than I was before. I have a workaround, of course. I've set the iMac (with the latest OS X) so that it is never put to sleep automatically. I put it to sleep by hand at the end of the day. I can deal with resetting the connection once a day.
Most of the time in the morning, I should add, the internet connection is still there, but *sometimes* it isn't. I find that very puzzling. There seems to be nothing going on at night, when it's asleep, so how could there be a difference in the morning?
Just as a side note, I have a Logitech Squeezebox internet radio. When the iMac loses its internet connection, the radio doesn't work at all. I guess it needs to get some information or other from the Logitech web site. Perhaps the presets are stored there. That's just annoying, when I get up in the morning and try to listen to the radio before I check the computer. Maybe I'm the last one left who does it that order, but I often do.
Anyway, I'm sorry that I raised false hopes. But it was the Apple support person who got me to clean out that PRAM. Shouldn't they know better? Another support person that I talked to wanted me to reinstall my OS. Do you have any thoughts on the probability that this would help?
Steve