JohSm

Q: iMAC 21" WIFI failing after 10.7.4 update

Hi,

 

Before the 10.7.4 update the WIFI connection from the iMac 21.5" to the airport extreme router works fine!

Now it's failing several times a day! it looses the wifi connection and you are unable to see any wireless accesspoints or SSID's

Macbook pro, iphone & ipad + PC's still works fine!

 

The only way to get the wireless up and working again is to shutdown and restart the iMac.

 

Please help, there must be a serious bug in this update any solution available to solve it?

 

In the log i can see alot, don't know if this is some clue or error occuring just after the wireless connection is dropped for unknown reasons.

 

"kernel: 2329.723808: ath_chan_set: unable to reset cannel XX (XX00Mhz) flags 0x10080 hal status 17"

"kernel: 2632.354892: ASSERT: Can not reenter VAP State Machine"

"kernel: AirPort: Link Down on en1. Reason 8 (Disassociated because station leaving)."

 

Turning off and on the wireless interface only shows the following in the log, and the wifi will not see any SSID's :

"kernel: 71847.200440: switchVap from 1 to 1"

 

/Johan

iMac, Mac OS X (10.7), 2011 Model i5 - 16GB - AMD 6770M

Posted on May 15, 2012 9:37 AM

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Q: iMAC 21" WIFI failing after 10.7.4 update

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  • by jrhansen,

    jrhansen jrhansen May 17, 2012 3:37 AM in response to JohSm
    Level 1 (0 points)
    May 17, 2012 3:37 AM in response to JohSm

    I have the same (frustrating) problem - also after installing the 10.7.4 update. I am also on a iMac 27" 2011 + Time Capsule (Airport Extreme).

     

    I have tried every little thing I could find on the internet (changing locations, resetting the SMC, disabling/enabling firewalls, changing the wireless channel from automatic to fixed and so on...) to no avail.

     

    At first the issue was seen after waking up the iMac from sleep, but now it seems to happen no matter what. The WIFI connection drops, and the iMac is then not able to see any WIFI networks (SSIDs). Restarting the iMac is the only remedy.

     

    I might add that I have seen lines like the following in the kernel log:

     

    -----------------------

    May 17 11:49:29 imac kernel[0]: 3996.331490: ath_chan_set: unable to reset channel 2 (2417Mhz) flags 0x10080 hal status 17

    May 17 11:49:30 imac kernel[0]: 3997.711558: ath_chan_set: unable to reset channel 3 (2422Mhz) flags 0x10080 hal status 17

    May 17 11:49:32 imac kernel[0]: 3999.086149: ath_chan_set: unable to reset channel 4 (2427Mhz) flags 0x10080 hal status 17

    May 17 11:49:33 imac kernel[0]: 4000.458665: ath_chan_set: unable to reset channel 5 (2432Mhz) flags 0x10080 hal status 17

    May 17 11:49:35 imac kernel[0]: 4001.839683: ath_chan_set: unable to reset channel 8 (2447Mhz) flags 0x10080 hal status 17

    -----------------------

     

    Thousands and thousands of these lines appear in the log, when I thought that the iMac was asleep.

     

    Apple: Please, help!

  • by wifiguru,

    wifiguru wifiguru May 17, 2012 8:59 AM in response to Lars Hoss
    Level 2 (240 points)
    May 17, 2012 8:59 AM in response to Lars Hoss

    How many Preferred networks do you guys have in your Preferred Network Lists ? Try keeping it under 5. That seemed to resolve the issue for me.

  • by Nefastos,

    Nefastos Nefastos May 17, 2012 10:59 AM in response to JohSm
    Level 1 (5 points)
    May 17, 2012 10:59 AM in response to JohSm

    Exact same problem here - can't reproduce it reliably, though. One minute everything is OK, then suddenly my iMac (21,5", i5) can't find _any_ Wi-Fi networks, even though my apartment building is full of them, our two iPhones and two MacBooks (Pro and Air) keep on working. Only started after the 10.7.4. update. Really frustrating.

  • by xfo01,

    xfo01 xfo01 May 17, 2012 11:03 AM in response to JohSm
    Level 1 (0 points)
    May 17, 2012 11:03 AM in response to JohSm

    Mine seems to have resolved by deleting all known networks, adding and then deleting a new location.  Then taking the tick out of the box remember know networks.  So far so good, but Apple, Realy?  You need to patch this ASAP.

  • by xfo01,

    xfo01 xfo01 May 17, 2012 11:06 AM in response to JohSm
    Level 1 (0 points)
    May 17, 2012 11:06 AM in response to JohSm

    I am getting the impression it is also isolated to Airport Extreme/Time Capsule Routers.

  • by JohSm,

    JohSm JohSm May 17, 2012 12:07 PM in response to xfo01
    Level 1 (0 points)
    May 17, 2012 12:07 PM in response to xfo01

    But if you do enable "Suspend computer" in powersettings i guess you will get the old problem back again..

    (I did the remove all network parts and add a new location and it seems to work as long as i do not enable the suspend computer in power options.. But maybe it will get back again....)

     

    If i do run the combo update now when i have 10.7.4, will it cause me to lose some other settings software installations / documents etc?

     

    /Johan

  • by pavel.pola,

    pavel.pola pavel.pola May 17, 2012 12:19 PM in response to JohSm
    Level 1 (0 points)
    May 17, 2012 12:19 PM in response to JohSm

    Hello, today again - after waking up from sleep, wifi was gone. My log file is full of these errors:

     

    17.05.12 20:56:09,000 kernel: 78615.025653: ath_reset: unable to reset hardware; hal status 17

    17.05.12 20:56:11,000 kernel: 78616.313488: ath_chan_set: unable to reset channel 140 (5700Mhz) flags 0x10100 hal status 17

    17.05.12 20:56:12,000 kernel: 78617.737277: ath_chan_set: unable to reset channel 100 (5500Mhz) flags 0x20100 hal status 17

    17.05.12 20:56:14,000 kernel: 78619.771524: ath_reset: unable to reset hardware; hal status 17

    17.05.12 20:56:16,000 kernel: 78621.272592: ath_chan_set: unable to reset channel 1 (2412Mhz) flags 0x10080 hal status 17

    17.05.12 20:56:17,000 kernel: 78622.655291: ath_chan_set: unable to reset channel 6 (2437Mhz) flags 0x10080 hal status 17

     

    and much more of these...

     

    17.05.12 20:56:32,000 kernel: KAUTH: unable to get path for vp 0xffffff803b7e4170 (err=22)

    17.05.12 20:56:32,000 kernel: EV: OnAccess module for MAC OS X: 'Get path from vnode failed' at line: 3383   dt:000005912[ns]

    17.05.12 20:56:32,000 kernel: KAUTH: unable to get path for vp 0xffffff803b7e3e88 (err=22)

    17.05.12 20:56:32,000 kernel: EV: OnAccess module for MAC OS X: 'Get path from vnode failed' at line: 3383   dt:000002010[ns]

     

    Only full restart helped. I have saved logs just after wake up and immediately after reboot so if anybody want to analyze it, just e-mail me.

  • by pavel.pola,

    pavel.pola pavel.pola May 17, 2012 12:30 PM in response to wifiguru
    Level 1 (0 points)
    May 17, 2012 12:30 PM in response to wifiguru

    I have 2 and still have this problem.

  • by wifiguru,

    wifiguru wifiguru May 17, 2012 2:13 PM in response to pavel.pola
    Level 2 (240 points)
    May 17, 2012 2:13 PM in response to pavel.pola
  • by frazierak,

    frazierak frazierak May 17, 2012 4:28 PM in response to Eduardo C
    Level 1 (0 points)
    May 17, 2012 4:28 PM in response to Eduardo C

    I have the same thing.  I use the imac 27" to share internet to macbook and ipad.  The macbook and ipad can join the network, and the internet works for about 5 seconds, then never again.

  • by Kirill Benkovitch,

    Kirill Benkovitch Kirill Benkovitch May 18, 2012 12:05 AM in response to JohSm
    Level 1 (5 points)
    May 18, 2012 12:05 AM in response to JohSm

    Hi!I have the same issue with iMac 21'.After update to 10.7.4 everything was just fine,after turn off/on my iMac said WPA2 key is incorrect.i've tried to delete a connection ,but still no results.turning off and on of the router solved the problem(will inform if works fine later).

     

    Pls,open bugreport at bugreport.apple.com

  • by guydominy,

    guydominy guydominy May 18, 2012 2:01 AM in response to JohSm
    Level 1 (0 points)
    May 18, 2012 2:01 AM in response to JohSm

    Hi same problem as all

     

    Updated 2011 iMac 27" to 10.7.4 (using Airport Extreme wifi) and it drops the wifi somewhere between once every few hours and once every 20 or 30 minutes. The iMac cannot see any wifi networks when this happens. As with others Airbook, iPad, and iPhone all still see the wifi network. Only solution is to restart the Mac.

     

    This *****. Apple please provide fix.

  • by jrhansen,

    jrhansen jrhansen May 18, 2012 4:30 AM in response to guydominy
    Level 1 (0 points)
    May 18, 2012 4:30 AM in response to guydominy

    As "wifiguru" and other threads mention, installing the 10.7.4 combo update might solve the problem, but...

     

    Don't bother! Just did it, and the issue remains.

     

    I have now connected my iMac using a long cable running from one end of the house to the other. This goes very nice with the beatiful and expensive look of the iMac :-/

     

    Regards

    One sad and mad Apple user!

  • by MangoGuy,

    MangoGuy MangoGuy May 18, 2012 4:54 AM in response to JohSm
    Level 1 (0 points)
    May 18, 2012 4:54 AM in response to JohSm

    I had the same problems as everyone else, but it has been 2 days now and since disabling Bluetooth I haven't had any issues. I really wish I could have my bluetooth mouse back but having wifi is more important.

  • by guydominy,

    guydominy guydominy May 18, 2012 5:35 AM in response to MangoGuy
    Level 1 (0 points)
    May 18, 2012 5:35 AM in response to MangoGuy

    Good to know but doesn't really help - I really don't want to (or feel I should be made to) buy a new keyboard and mouse!

     

    Please there must be another fix!

     

    Does Apple monitor these boards?

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