Q: Lion WiFi Connection Problem

I have now disabled the IPv6 settings on both my iMac and MBP (editing the plist and making them __inactive__ to completely have it off) and besides connecting to the wireless network faster, my iMac still won't work over N... connects just fine, but with zero to slow (it tries to do something but eventually times out) network activity...

I have been working through the various suggestions ( thanks everyone ) and my wiffi has become more stable on each occasion, I changed theIPv6  to Local link and that has given me a very stable connection all evening.

I have recently started using BT HH3 which initially was all over the place but it seems as if the systems learn and improve as they have some time working together, this is probably imaginary but I am sure my boot up times are reducing even though I have done nothing other than disabling the resume windows option and unchecking the open previously opened windows in the log out box.

The IPv6 trick seems to have worked for me too. Connection is much more stable so far (12 hours).

Thanks all.

I'd like to add to this list. With Snow Leopard, I NEVER had WiFi issues. With the upgrade to Lion, I do. It's not the WiFi router, becuase all my iOS/Windows devices connect just fine. Waking from sleep is usually an issue, where I have to turn WiFi off and then on again to get it to work (although it shows a full signal strength either way). Also, when connected, the WiFi drops intermittently, such as when watching an Instant NetFlix movie. Fix please!

iMac late 2009

2.8 GHz Intel Core i7

8 GB 1067 MHz DDR3

ATI Radeon HD 4850 512 MB

Mac OS X Lion 10.7 (11A511)

Here is my latest update...

Logged on to the router, lowered the N speed from 300Mbs to 54Mbs and I can work with it no problem now...

sadly, it defeats the purpose of N speeds as I'm now running at G speeds (even though I'm on the N network) to my wireless NAS...

but at least that has narrowed down the problem to a working condition...

as a recap

• DNS: 8.8.8.8

• IPv6 is Off

• Netgear WNDR3700 Dual Band router broadcasting both G and N networks (now both set at the same 54Mbs speed )

• WPA2 Personal Security

• Location: Automatic

• MBP has a Broadcom wireless chipset, iMac and Router have an Atheros chipset

• N network @ 300Mbs = both computers connect, only MBP would have actual network activity, iMac everything times out

• N network @ 54Mbs = both computers connect and have full network activity

• G network @ 54Mbs = both computer connect and have full network activity

• G network = Channel 11, N network = Channel 161

Computers

2010 13" MBP

2011 27" iMac

Perhaps this problem relates to another older thread on the same subject:

https://discussions.apple.com/message/12703404#12703404

There is an answer from Tenortim, attached to the original post, that seems to work well.

Maybe a bit too advanced for the common user though?

... but still, if we take stock of the situation, no final solution, no intervention by Apple.

.......ma a tutt'oggi, se vogliamo fare il punto della situazione,  nessuna soluzione definitiva, nessun intervento da parte di Apple.

Yep, count me in too...  Same as others, I have to re-connect to wifi after waking from sleep... 

Not sure about you guys, but my bluetooth (magic mouse) is doing the same thing.  I have to disconnect then reconnect the mouse after waking from sleep.  I really hope Apple resolves this connectivity issue very soon.

Set my IPv6 to link-local and that really speeds up the (re)connect!

Could this have a connection to the perhaps older chipsets?

Count me in.  Since upgrading to Lion, my WiFi connection drops, and the router disappears from the list of available wireless networks.  Two ways to get connection back: restart my iMac or turn Wifi off then on again.  But then 20-30 mins. later it happens again.

Count me in.  I just started to notice this problem about 2 days after I had installed Lion, and boy is this problem clearly evident.  I'm just thankful I'm not the only one with this problem.  I can't have my WiFi dropping every 5 minutes on my iMac.  Hopefully Apple can resolve this issue with an update soon.

Hi Guys,

My issue more serious than dropping connections. I CANNOT CONNECT!! I keep getting connection timeout from our all office access points. But anywhere else , i can connect decently.

I joined this company for 6 months now and had no problem whatso ever until 1 day after updating to lion. I HAVE NO IDEA , is it software or hardware!! In boot camp also my wireless is not connecting to routers...I cannot believe it is hardware issue because i can connec to all other networks.

Changing the wireless router config is IMPOSSIBLE. it take me 10 days to get appointment to see the IT guys and they are not going to change anyting on router. I end up buying a wireless usb adapter. It is ******* me off. Any help?

This is my wifi card spec:

  CoreWLAN:          2.0 (200.46)

  CoreWLANKit:          1.0 (100.43)

  Menu Extra:          7.0 (700.42)

  configd plug-in:          7.0 (700.57)

  System Profiler:          7.0 (700.3)

  IO80211 Family:          4.1 (410.1)

  WiFi Diagnostics:          1.0 (100.26)

  AirPort Utility:          5.5.3 (553.20)

  Interfaces:

en1:

  Card Type:          AirPort Extreme  (0x14E4, 0xD6)

  Firmware Version:          Broadcom BCM43xx 1.0 (5.100.98.75.6)

  MAC Address:          e4:ce:8f:03:ae:20

  Locale:          APAC

  Country Code:          X1

  Supported PHY Modes:          802.11 a/b/g/n

  Supported Channels:          1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165

  Wake On Wireless:          Supported

  AirDrop:          Supported

  Status:          Connected

I just filed a bug (https://bugreport.apple.com/cgi-bin/WebObjects/RadarWeb.woa/28/wo/GDaZh3pvSp7a60 bPSRo37w/10.83.28.0.9) where Java could be the problem.

No problem with my Mac Pro and snow leopard ,then I upgraded to Lion and my connection keeps timing out. Hardware and all my other computers are working perfectly except my mac with Lion. Unacceptable considering that Mac has a great system but should have fixes for it before puts it out for use. If we are the testers for Lion then we should be compensated for all the trouble it's costing.........just my opinion.

I am adding my name to this list as well...haven't found a solution and after being increasing frustrated with it, I ended up disabling wireless and connecting via wired.  Using iMac 21.5".