iwlagn issues (deep sleep, device not ready)

**lejono** · February 10th, 2012

My wireless card, which has been working fine for ages, stopped working recently (presumably due to some automatic update). I'm using Ubuntu 11.04. My wireless card is an Intel(R) Centrino(R) Advanced-N 6200 AG, and I have a Lenovo X201. The wireless device connects fine initially, but after about 10 minutes, disconnects and has trouble reconnecting. Then it just goes dead, and network manager doesn't report any visible devices, or doesn't even show the existence of the wireless card. After rebooting, it works fine again for another 10 minutes. Turning on and off wireless in network manager sometimes corrects the problem once or twice, but then even this doesn't work.

iwlagn is reporting the following types of errors in kern.log:

"iwlagn: Request scan called when driver not ready"
"iwlagn: MAC is in deep sleep!"
"iwlagn: Unknown hardware type"
"iwlagn: Unable to init EEPROM"
"iwlagn: probe of 0000:02:00.0 failed with error -2"

etc.

Googling reveals various people with similar problems, and a few bug reports which may be related, but just get closed, but no solution. Any ideas???

J

**lejono** · February 15th, 2012

I installed linux-backports-modules-cw-2.6.39-2.6.38-13-generic which corresponds to my kernel version. That seems to have helped, in terms of sometimes I can go a few hours before my wireless dies and I need to reboot.

Anyone know a proper solution??

**chili555** · February 15th, 2012

Anyone know a proper solution??

KNOW a proper solution? No. Willing to work on it with you? Yes.

Is power management on or off?

Code:

iwconfig

wlan0 IEEE 802.11abg ESSID:"GBR1"
Mode:Managed Frequency:2.462 GHz Access Point: 99:13:10:62:88:77
Bit Rate=54 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=65/70 Signal level=-45 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:89 Missed beacon:0

Is the behavior improved with 802.11N disabled?

Code:

sudo rmmod -f iwlagn
sudo modprobe iwlagn 11n_disable=1

**lejono** · February 19th, 2012

Thanks chili555, much appreciated! And sorry about the delay, I had given up hope and wasn't checking the forum. Will do that now. Power management is off. Disabling 802.11N doesn't seem to make any difference....

**chili555** · February 19th, 2012

I'm sorry; I am out of ideas. All I can suggest is to keep Googling for "iwlagn: MAC is in deep sleep!." Like you, I have seen the complaint many times but haven't seen the solution.

**griffjon** · March 13th, 2012

Bump - same problem, with an Intel 5300 and a Lenovo y550, but otherwise exact same symptoms, and in 11.04 . modprobing does nothing, but rebooting so far always restores wifi.

This bug appears related: https://bugs.launchpad.net/ubuntu/+s...ux/+bug/903517

Installing backports may help: http://ubuntuforums.org/showthread.php?t=1783456

**lejono** · April 8th, 2012

I've upgraded to the 3.0.0-17-generic kernel, and Ubuntu 11.10, and still have the same issues. One thing I've discovered is that the problem kicks in if the signal is weak. It's pretty frustrating that this issue is being widely reported for some time, but with no solution...

**Light-kun** · May 18th, 2012

Hi.
have similar problem with :
"iwl3945: Intel(R) PRO/Wireless 3945ABG/BG"

rmmod+modprobe did this (the interesting part):
iwl3945 0000:06:00.0: bad EEPROM signature,EEPROM_GP=0x00000007
iwl3945 0000:06:00.0: EEPROM not found, EEPROM_GP=0xffffffff
iwl3945 0000:06:00.0: Unable to init EEPROM
iwl3945 0000:06:00.0: PCI INT A disabled
iwl3945: probe of 0000:06:00.0 failed with error -2

I have Ubuntu 12.04 with 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:52 UTC 2012 i686 i686 i386 GNU/Linux

Should I start another topic?

**chili555** · May 18th, 2012

Should I start another topic?

You certainly could; however, looking at this forum and Google, I'm not confident there is an answer as I said above.

**lejono** · August 1st, 2012

After massive frustration trying to fix the problem, it turns out to be a hardware issue. It got to the point where it was happening every half hour, so I decided to boot up windows (which I never do), and wouldn't you know it, but it was happening there as well. There are lots of similar reports, so it may be a common hardware issue with this wireless card. Got a replacement from Lenovo, and bang, problems solved.