Dropping Wi FI Signal

Any resolution on this as I am having a similar issue on my Leopard PB 10.5.8????

My wi-fi is back to being intermittent after a few hours of relief. My enthusiasm for a 'fix' was premature! It really is very, very irritating and has seriously slowed my work down.

Perhaps this is a problem of compatibility with the router firmware as some have suggested .... has anyone tried changing their router? Mine is very old and I wonder if this would help.

J

PS In response to the various doubters... I had no problems at all with SL - this definitely a lion issue in my case.

I upgraded my 3 machines to Lion over the weekend and am now experiencing the same issue and see this in the console of the machines "airport link down on reason 2 previous authentication no longer valid".

My access point is an Airport Extreme with 802.11N. Never had a problem with 10.6. If I reboot the Airport Extreme, everything seems to work again for a few hours, but then the problem arises again.

j

I am intrigued by the message "previous authentication no longer valid". Maybe I am barking up the wrong tree, but I noted in times past, that the keychain entry for the wifi holds the user ID, PW and another long character string. This latter changes sometime when the network re-connects and so the keychain entry becomes invalid. Well, it seems to me this is introducing an unnecessary unreliability into the system, but who am I to know😕

Try deleting the two keychain entries in Login and System, and re-connecting. You will need to re-enter your encryption password.

Most MacOS network problems can be fixed with a simple cleanup of the network configuration:

sudo rm /Library/Preferences/SystemConfiguration/*

reboot

reconfigure

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

https://discussions.apple.com/thread/2644274?answerId=12703404022#12703404022

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?

I had the EXACT SAME ISSUE. I wanted to slam my iMac on the ground. I tried all the "fixes" posted but none worked. I was on my last resort of going back to SL then i got brave and decided to upgrade my router.

I was using an old Lynksis wireless G router that i've had for many years. I had a $50 BB gift card laying around and figured what the heck. I purchased a NetGear N600 Dualband Wireless N router. Took it home and set it up.......2 weeks in......NO ISSUE. At all. My iMac stays connected and has not dropped (5.0mGhz band). Even after sleep, it finds and connects. I don't know if it was wireless G old router just banging me out but this surely "fixed" my issue.

I'm just glad i had that gift card.

Hi i'm from Italy and i tried a lot of solutions seen in this and in other posts.After a lot of backups i turned back to Snow Leo and i to disabled the IPv6 in the TCP/IP from the advanced tab in Network Preferences; then i installed the "Supplemental Update OSX 10.6.8" found here: http://support.apple.com/kb/DL1429?viewlocale=en_US.

Then i've installed Lion and now I have a stable wifi connection.Hope this will help!🙂

According to this discussion, which has been going on for years, it seems Apple have used a firmware version in Lion that has already been found to cause problems on some computers with both the Atheros and Broadcom chipset. There is a post by BananaMacintosh that summarises a procedure for installing a previous version. It is not for inexperienced users and may not be the answer anyway. Atleast Apple will be aware of the issue.

https://discussions.apple.com/thread/2644274?start=465&tstart=0

Also a good writeup here too.

http://thoughts.maayank.com/2011/08/wireless-problems-with-macbook-air-and.html

eg. My MBP uses the Broadcom chipset...

I should add that the kudos goes to "tenortim" for the original answer.

Well, now we are advised that this is in fact a dangerous procedure. Perhaps I have been precipitous in endorsing it and will be more circumspect in future!

See William Kucharski's posts:

https://discussions.apple.com/thread/3191630?start=510&tstart=0

I have a Macbook pro since December 2010 which has been constantly dropping home wifi (but nowhere else). Yesterday I put" ping ghacks.net" in the terminal and have done this again today when starting up the laptop and so far.......not dropped once. Hope it lasts. (apologies if someone else has already posted this)

Sorry, just ignore my last post about doing "ping ghack.net"........its stopped working and I get lots of lines saying "Request timeout for icmp_seq". Oh well, it was good while it lasted.

Hi All,

I started suffering dropped network connections on one of my machines and here's what I did to fix it.

My network consists of: 1 Airport Extreme, 2 Airport Expresses, 1 Netgear wired router (which runs the DHCP server), 1 Linksys AP and a variety of client HW (MacBook, MBP, etc.). In my case, network connectivity would drop on the MacBook. Every other device seemed solid and fine. I tried all of the fixes I could find, short of replacing the Lion driver, to no avail.

Finally, I looked at the DHCP lease information on the Netgear router and I discovered that two devices had been handed the same IP address - the MB and a Roku. The interesting thing is: no "duplicate IP address" messages on the MB, either as a notification or in the kernel log. Anyway, I fixed the configuration error that was causing the duplicate address to be handed out, renewed the MB DHCP lease and now all is well.

I hope this information is helpful to some of you.

I had exactly the same problem. The following link worked for me http://rys.pixeltards.com/2011/09/04/osx-lion-wifi.html

Check what wifi chipset you have as it only seem to apply to Atheros Wifi hardware.