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I am assuming everybody's updated their router to latest firmware? Older firmware can sometimes be the problem.

It's the other way around for many. Downgrading the firmware seems to fix it for many. I downgraded my Gigabit N Extreme from 7.2.1 to 7.2 and have yet to experience a blowout.
 
Wireless

All,

I've been reading all the responses, but for me, they do not seem to be applicable. For my wireless setup, the only thing I do is not broadcast my SSID. So when I set up wireless on my Mac mini, I enter the SSID, and indicate that I want to save the settings. If I let the Mac sit idle for a while (30 minutes or so), I lose my connection, and have to click on the wireless icon at the top of the screen to set it up again. It does the same thing when I turn the Mac off and then on again, it's not a big deal, but annoying.

Any suggestions would be appreciated. Previously this was not the case (10.4), and I must mention that my wireless connection is not as good as it was on the previous release.

Thanks all for any suggestions.
 
I've actually been having this problem since 10.4.10 - was hoping Leopard was the answer to it, but left the computer alone for 15 minutes (sleep mode) and it died. It's also died just as randomly as before as well when I'm not sitting idle.
Apple has known about this for a long time, and we'll see when they actually get around to fixing it.
 
Still no joy

Taking the damn thing to the Apple store tomorrow... wish me luck. I'll post about how it goes
 
I just started having this problem, and it started ever since upgrading to Leopard. I have a Linksys WRT54GS router, and have SSID broadcast off as well.

Everytime I open the macbook, I have to either turn airport off/on or re-enter my SSID/WPA password to get back on. Major PITA! :(
 
try this

I had the same problem after I upgraded my MBP to Leopard. I would constantly lose my connection when the laptop slept. In fact, my MBP couldn't even find my network on startup. I ended up having to use iStumbler to manually connect.

I ended up doing two things which seem to have solved my problem, though who knows which one did it:

1)Re-installed Leopard, this time from scratch (originally did an archive and install)
2)In Sys Prefs under Network>Advanced I unchecked the "Disconnect from wireless network at log out"
3)Also in Sys prefs under network, unchecked the "ask me to join other networks" option.

After doing these things, I no longer get that pop-up, and Leopard connects instantly to my network. I really think #3 contributed, but who knows
 
Why turn off SSID Broadcast?

Just curious why people think turning off the SSID broadcast does anything to secure your wireless? I believe I am able to connect to networks without an SSID listed on my Thinkpad as the IBM utility still lists the networks, just without the name.

If you want to secure access just turn on WPA or WPA2 in your wireless settings. It's really simple.
 
I had the same problem after I upgraded my MBP to Leopard. I would constantly lose my connection when the laptop slept. In fact, my MBP couldn't even find my network on startup. I ended up having to use iStumbler to manually connect.

I ended up doing two things which seem to have solved my problem, though who knows which one did it:

1)Re-installed Leopard, this time from scratch (originally did an archive and install)
2)In Sys Prefs under Network>Advanced I unchecked the "Disconnect from wireless network at log out"
3)Also in Sys prefs under network, unchecked the "ask me to join other networks" option.

After doing these things, I no longer get that pop-up, and Leopard connects instantly to my network. I really think #3 contributed, but who knows


Cheers dude... I'll try 2) and 3) before I have a crack at 1)

I didnt go to the Apple store in the end - too hungover - but I'm sceptical that would have helped anyway

I popped to a friends place and connected to his wireless network - I think he uses a Linksys. Once I entered the WEP info, the connection was cool
I closed the lid of the machine, opened it again, and it found the network again automatically - none of this crap with having to re-enter login details

Soooo.... I'm thinking it's the Netgear that's causing the problem.

The search goes on....
 
Cheers dude... I'll try 2) and 3) before I have a crack at 1)

I popped to a friends place and connected to his wireless network - I think he uses a Linksys. Once I entered the WEP info, the connection was cool
I closed the lid of the machine, opened it again, and it found the network again automatically - none of this crap with having to re-enter login details

Soooo.... I'm thinking it's the Netgear that's causing the problem.

I dunno about that... 'cause I'm having the same problem. I'm running my network from an Airport Express, and I just started having the same problem as of yesterday. Everything was fine, and then last night after I closed my PowerBook's lid and reopened it, it didn't recognize my wifi network.

Since then, I've done everything I can possibly think of... deleted the network info from system preferences, from the keychain tool, from the network preferences... re-installed the keychain updater that was released last week... checked for airport updates... and nothing.

EVERY SINGLE TIME I turn on my computer, I have to reinput my network information... grrrrr.
 
Soooo.... I'm thinking it's the Netgear that's causing the problem.

The search goes on....

On my uni network it works fine, WPA enterprise.

On my home network which i can no longer get on (spent 45 minutes trying) this is with WEP on a Netgear.
 
I have tried everything to get this sorted.

It is odd because i was on it this morning and then it disconnected and ever since then both of my macs can no longer connect.
 
I have this issue as well, using an Apple Airport extreme base station the net just drops out whenever it wants.Fed up to to the point of just wanting to sell this crap(15" 2.4 GHZ SR MBP), my 12"powerbook beaten to death right next to it, never has this issue:mad:

Short of a complete re-install(which should not be needed this is not windows), i have done all the band aid fixes to no avail.Apple has lost my respect as of late, i was initially really happy with this purchase too.
 
I have this issue as well, using an Apple Airport extreme base station the net just drops out whenever it wants.Fed up to to the point of just wanting to sell this crap(15" 2.4 GHZ SR MBP), my 12"powerbook beaten to death right next to it, never has this issue:mad:

Short of a complete re-install(which should not be needed this is not windows), i have done all the band aid fixes to no avail.Apple has lost my respect as of late, i was initially really happy with this purchase too.

Don't bother with a complete reinstall because it won't fix it. It is an issue with Leopard not your particular mac and should be resolved via an update soon.
 
OK after 2 days without being able to connect at all with either my Macbook and iMac and after updating the firmware with no results, my iMac suddenly connects and so far, touch wood, hasn't had any problems with connecting. The Macbook however still won't connect.
 
Fresh Install

Have you tried a fresh install? I was having major problems and finally did a fresh install and everything has been working great all evening.

Cheers.
:):apple:
 
I also performed a fresh install (since I originally had this problem after upgrading from Tiger to Leopard) and this problem seems to have gone away.
 
That last post of mine was done while hacking through the wireless settings to test if the network was working I bought up forum spy and there was this thread so I quickly posted.

After finally convincing my housemates to abandon WEP and use an access control list and then getting all of their MAC address, has taken a couple of days to track them all down (I live with 6 other guys). We have a working/stable wireless connection. Horray. This will of course be monitored over the next couple of days but there is something funky with Leopard and the WEP setup and remembering favourite networks. Even still ion my iMac even though it has remebered the network it says can't find preferred network which is only slightly annoying as this time when I click on the network it connects.

Solution Abandon WEP and use something else, in my case MAC address filtering.
 
FWIW, I used WPA and still had that problem before my fresh install.

It seems like nobody can pinpoint the actual cause of this problem other than their upgrade to Leopard, although it doesn't seem to be happening with all upgrades.
 
hey dude

no, I'm not broadcasting - always been advised not to for security reasons (maybe that's cr*p advice tho!)

i'll try broadcasting, connecting, closing the lid and then opening again - let's see

cheers

Its only advised if you're using crap like WEP - why aren't you using WPA/WPA2?
 
Its only advised if you're using crap like WEP - why aren't you using WPA/WPA2?

I wasn't using anything more because there are other computers in the house that can't seem to handle it and also the network was setup before I got here.
 
I wasn't using anything more because there are other computers in the house that can't seem to handle it and also the network was setup before I got here.

What are the other machines? Windows XP has a WPA2 update, and Windows Vista supports it 'out of the box'.
 
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