Internet connection lost after machine sleeps or idle for a while

I upgraded my 24" iMac, 2.16 to a 27" iMac I7. I am now having probles remaining connected to the internet after the machine is idle for a while. I am using a Time Capsule and cable router and have been using the same two devices before the ungrade in my computer. I am also using OpenDNS, again as before. My computer is wired to the TC via ethernet and my wife's computer is wireless. She has no problem. She does not lose connectivity at all on her iMac 24". The drop occurrs time to time after the machine sleeps or sits idle for a while. I know Ive seen various threads about connectivity issues but can't seem to find an answer. Help is appreciated.

I had a very similar problem which I fixed like this:
1) Move the file /Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist to your Desktop.
2) Reboot
Snow Leopard will rebuild this file from other info.
This sorted out all my won't connect/loses connection issues.

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Wireless Internet connectivity lost after sleep

I've got a problem where I keep losing my wireless network connection after going to sleep.
The situation is that I'm connecting to my university's secure network. I have the credentials saved on my MacBook. When I need to go and leave my computer on my desk, I go back to the login window, and close the lid. When I come back and open it again, I'm instantly asked for the network password, at the login screen. Regardless of whether I enter it or dismiss the dialog, I'm unable to get a connection automatically after I resume my user session. There's an exclamation mark on the network icon and it says that there's no internet connection on the menu. When I click on this warning, I'm asked to repair the network connection and re-connect to it. This works, but I'd much rather that this be done automatically. Is there no way for me to resume connectivity after waking up my MacBook without having to manually re-connect?
Thanks in advance for any suggestions.

The problem's still happening in 10.6.2. I lose my Internet connection when I go back to the login window, then close the lid on my MacBook so that it goes to sleep. When I awake it, and log back in, I'm shown as being connected to the network, but not to the Internet. I have to manually re-connect.
When I just close the lid without exiting to the login window, it appears that my Internet connection is re-established automatically, though, on re-awakening. I'm puzzled as to why this is occurring. It looks like a bug to me.

WiFi Internet connection lost after iMac wakes up, what to do ?

Hi,
I used my iMac for a while with an older D-link product and Internet connection was fine. I purchased a new D-link product and whenever my iMac goes to sleep and wakes up again, I lose INternet connection although my airport icon still recognizes the network and says signal is at full strength. Apple Care can't help me.
I have a PC directly connected via wire to the same router and Internet connection is flawless so my ISP is not the problem. I use cable modem.
No it got worse. I start up my Mac, have connection but if I stay to long at the same webpage and then try another page, somehow it stalls!! Very frustrating. Anyone any ideas ?
Thx&Rgds

To Apple Discussions!
"I purchased a new D-link product"
Have you contacted the manufacturer to determine if the problem is with them?

Internet connection lost after browsing the internet

Hi, I am fairly new to the mac world. (less than two years) And I have a problem that I was hoping someone can help me with.
I have a Power mac G5 dual processor, with Mac osx panther installed. Everything works great, except when I try to browse the internet. For some strange reason it will drop my connection and to bootm I also have a G5 server that I am connected to, but as soon as I lose my internet connection I also lose my connection to my server. Now I know it can't be the router since other computers keep their connection while mine drops randomly.
Our office has a basic setup, computers and server plugged into a switch, the switch goes to the 2wire (router/DSL combo) device. The firewall is within the 2wire and the server's and computers' firewall are disabled, since the 2wire has the firewall protection the whole subnet.
Please help
Thank you
G5 Server Mac OS X (10.3.9)

I had this same issue on an Acer Aspire 5520 laptop with an atheros chipset for which I was using ndiswrapper. Long story short I downgraded to kernel 2.6.24 and that fixed the problem .
Sorry not much help...I have no idea where the culprit is, but it is a very annoying problem.

BEFW11S4 wireless connection lost after reboot / sleeping

I am using the linksys wireless router BEFW11S4 version 4, firmware version 1.5, to connnect two winXP computers, one a desktop (wired) and one a laptop (wireless).
The wireless connection was created using the EasyLink Advisor software (support.linksys.com). The wireless connection made by this software to my laptop has no signal strength problems. A wired connection to my laptop also has no problems.
However, if a wireless connection is made, it is broken when my laptop is restarted or sleeps (power saving mode). The sysTray indicates a wireless connection that has "limited or no connectivity". I cannot browse the internet. The EasyLink advisor automatically detects a problem and prompts ot repair it. Though after a few steps the EasyLink Advisor indicates that a "wireless connection failed to be made", the sysTray shows a healthy connection, and it becomes possible to browse at this point.
I'm hoping to make a connection that doesn't need to be re-established every time I leave my computer. Has anyone experienced a similar problem?

Carrot, thanks very much for your message. I tried updating the "firmware" -- is that what you meant by drivers?
By following the instructions at http://linksys.custhelp.com/cgi-bin/linksys.cfg/php/enduser/std_adp.php?p_faqid=4030&lid=7771778881B05,
I upgraded the firmware which involved performing a factory reset on the router, and re-establishing the network using the EasyLink Advisor.
All of the steps were carried out easily according to the instructions and there were no hitches or exceptions. The wireless connection made was strong and usable. At this time I added my second (desktop) computer which has a wired connection, by following the "add another computer" wizard in EasyLink Advisor.
This completed the re-setup of my network with new firmware.
I then restarted my wireless laptop, and, unfortunately, the connection was lost, as usual.
any other suggestions?
Thanks again!

Internet connection lost after security update HELP

Help, After i installed security update suddenly recently i couldn't connect to internet. But i can see my airport connection in the airport utility and it doesn't have any problem with it. I directly connected the cable to my imac(detaching the cable from airport and connected it directly to imac machine) and still I cannot connect to internet. I don't know what happened, can somebody help me and tell me what's wrong with my mac.

try the firewall settings in the system prefrences.
if not it could be your ISP.
JS

Internet connection lost after -Suy

I just went through a huge -Suy and I've lost the ability to connect to the internet.
I have had problems with my router lately (I've been having to restart it almost everyday to start dhcp on my pc's). However, I restarted it aobut 12 times this morning, and I can reach the internet on my webserver which wasn't upgraded recently.
The only major package upgrade that might be relevant that I can remember is udev.
I'm using the forcedeth module for networking, and I am getting a message in my 'everything.log' that says something to the effect of
Timed out while waiting for a response from a valid DHCP server.

Actually it's working just fine. For the first time ever udev has made a distinction between my two networking cards, and named my onboard networking card eth1. I changed it to use eth1 in rc.conf and now i get this
[root@sg01 sgillespie]# /etc/rc.d/network restart
:: Stopping Network [BUSY] down: error fetching interface information: Device not found
[FAIL]
:: Starting Network [BUSY] eth1 Link encap:Ethernet HWaddr 00:50:8D:E9:10:EA
inet addr:192.168.1.102 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::250:8dff:fee9:10ea/64 Scope:Link
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
RX packets:140 errors:0 dropped:0 overruns:0 frame:0
TX packets:158 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:62027 (60.5 Kb) TX bytes:21387 (20.8 Kb)
Interrupt:17 Base address:0xc000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[DONE]
What is going on?
EDIT: Once again, it's working. I forgot to change the other references to eth1, so no problem now. Life goes on...

Internet connection lost after start up or restart

Hello,the last few days I noticed that after a restart or start-up I click on Safari or Firefox 3 and I do not have a connection for about a minute or two.What could be causing the delay with the connection,I have a high-speed cable modem with wireless router to my iMac.wireless is turned off seeing I do not move it around the house.Any help would be much appreciated,Thanks.

I figured it out, somehow a few router settings were changed. Thanks anyways all
Message was edited by: RMT07

I can't get internet connection even after wi-fi set is done with cisco

I can't get internet connection even after wi-fi set up is done with cisco

Not sure what Cisco is but if you are having problems with your wifi this link might help
On the iPad... tap Settings / General / Reset / Reset NetworkSettings.
Or here is a link that might help http://support.apple.com/kb/TS1398

Can,t access wifi via airport after left my mbp idle for just 1 minute

i can,t access wifi via airport after left my mbp idle for just 1 minute, i need to turn airport off & turn airport on if i left my mbp idle for just 1 minute or less...why this thing happen? anyone can help thanks in advance

Something that came to mind after rereading you post relates to the particulars of a "hard" reset on the Snow.
A “hard” reset removes current setting from the base station. You must then connect to the base station using the AirPort Admin Utility and upload AirPort 2.0 or later software to return the base station to its default settings. A base station in a hard reset is only accessible through the LAN port, not via wireless connections ... so attempting to access with the AAU, via a wireless client, will not work.
The following is the process to reload the AirPort software: AirPort Base Station (Dual Ethernet) : How to reload software from Mac OS X

Won't print after sitting idle for a while

Officejet Pro 8600 Plus. I have to turn the printer off and back on after it sits idle for a while. The printer shows on line in the control panel until you try to print then it goes off line. Wireless network Windows 7.

Hello LARMC, and welcome to the HP Forums, I hope you enjoy your experience!
I see you are experiencing idle issues. I would like to help.
I would recommend performing a power reset. Disconnect the power cord from the printer and the power outlet, then wait 60 seconds. After 60 seconds, plug the printer back in. Ensure you plug the printer directly to a wall outlet. Make sure to bypass any sort of surge protector or power bar.
I would also suggest downloading and running the HP Print and Scan Doctor.
Good luck and please let me know the results of your troubleshooting steps. Thank you for posting on the HP Forums!
Please click “Accept as Solution " if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks" for helping!
Jamieson
I work on behalf of HP
"Remember, I'm pulling for you, we're all in this together!" - Red Green.

Even though my wi-fi is up and available my mac seems to take it off the list after being idle for a while and does not auto re log on no matter how many times i enter it in preferences

Every time my Mac has been idle for a while and i go to mail or safari they fail as the network has been deselected even though it is on .My Touch never has a problem just my iMac I put the details back in and apply them and lock it , if i stay on for hours and hours no problem but if i leave for a while when i get back the network is not selected in the list … it is there just not ticked … the lock is still on and an ADMIN password required to change it is ticked .
HELP this is so…so… anoying .

Every time my Mac has been idle for a while and i go to mail or safari they fail as the network has been deselected even though it is on .My Touch never has a problem just my iMac I put the details back in and apply them and lock it , if i stay on for hours and hours no problem but if i leave for a while when i get back the network is not selected in the list … it is there just not ticked … the lock is still on and an ADMIN password required to change it is ticked .
HELP this is so…so… anoying .

Network connection lost after waking from sleep

iMac (27" late 2013) running Yosemite 10.10.
Ethernet connection direct to the computer from the FIOS router.
Upon waking from sleep, the computer is not connected to the internet.
After about 20 seconds it finally reconnects.
Under Mavericks it never lost the connection by sleeping - was instantly connected upon wake up.
I tried creating a new location under the network system preferences and ordered it so that Ethernet was the first to connect.
That didn't change anything.
Any suggestions how to fix this? I don't want to have to wait every time I wake up the computer.
Really bugging me.

Update on my situation.
I have tried many things to get this fixed including:
SMC reset (for an iMac this means unplugging it, waiting, and plugging back in)
PRAM reset
deleted the "system configuration" folder
Still no luck. Upon freshly booting the machine, it gets to the desktop and opens up mail for me, but the internet is not connected right away. Still takes an additional 15seconds or so after Mail boots up to get a connection. Then everything works fine. If the computer sleeps, it doesn't have internet upon waking, but again will establish a connection (self assign an IP address) after about 15-20 seconds.
So while not crippling, these 15-20 second waits are very annoying.
Interestingly, this is ONLY with a wired Ethernet connection. If I use WiFi everything connects right away. But my WiFi is slower than the wired connection and I prefer to use the wired connection.
Any further suggestions are welcome.
Chris

Connection Lost After Wake From Sleep

I am using a Macbook Pro and Linksys WRT150N W/L router. Every time my MBP wakes from sleep, I lose my internet connection. My menu bar still shows that I'm connected to the network, but I lose all connectivity. I cannot connect to internet or my router settings unless I do a complete restart. Network preferences shows connected to network but no connection to my router IP address under TCP/IP tab in the advanced settings. I also have a drop out of signal a few times an hour. My iMac DV does not experience the drop outs or connection loss at anytime. I have reset my router numerous times and used default factory settings all with the same results. Does anyone have an idea what the problem may be? Thanks.

I was always experiencing drop outs as far as what my signal was showing in my menu bar. It would drop out even if I was on top of my router. I had upgraded to 10.4.11 and the day after I did that, the problems started. I thought I might as well upgrade to 10.5 to see if that might help it. I think the 10.4.11 had done something to my W/L card and upgrading to 10.5 wouldn't have helped it unless I upgraded from 10.4.10 to 10.5, skipping 10.4.11 all together. I'm gonna bring my router and MBP into the genius bar and see what they can tell me about. Thanks for replying. I'm glad and sad to hear that I'm not the only one experiencing these symptoms.

Jdbc connection lost after idle time

Dear users,
i'm using the oracle 10g database. Now i found out that several programs (SQuirreL, QuantumDB,...) which use the ojdbc14 driver are losing connection to the database after about one hour idle time, but it is not set in db configuration to disconnect (eg parameter idle_time is not set). What could be the cause of this? Is this a error of jdbc (the java exception is something like socket lost) or is it a missconfiguration of the db?
Thx for help.

With a simple java program that makes a select on a database table over jdbc after one Hour idle_time this exception happens: (the program is started local on the database server so no firewall or router is between)
java.sql.SQLException: No more data to read from socket
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1118)
at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:1070)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:478)
at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:207)
at oracle.jdbc.driver.T4CStatement.executeForDescribe(T4CStatement.java:790)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1039)
at oracle.jdbc.driver.T4CStatement.executeMaybeDescribe(T4CStatement.java:830)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1132)
at oracle.jdbc.driver.OracleStatement.executeQuery(OracleStatement.java:1272)
at test$1.run(test.java:24)
at test.main(test.java:55)

Internet connection lost after machine sleeps or idle for a while

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