Bug 504626 - Wireless 4965AGN: only 802.11b appears to be working (no 802.11a or 802.11n; 5.8ghz)
Wireless 4965AGN: only 802.11b appears to be working (no 802.11a or 802.11n; ...
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
x86_64 Linux
low Severity medium
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2009-06-08 10:36 EDT by Gregory Maxwell
Modified: 2009-06-08 11:37 EDT (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2009-06-08 11:25:43 EDT
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Regression: ---
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Dmesg output from a boot with the new kernel. (41.14 KB, text/plain)
2009-06-08 10:36 EDT, Gregory Maxwell
no flags Details

  None (edit)
Description Gregory Maxwell 2009-06-08 10:36:38 EDT
Created attachment 346887 [details]
Dmesg output from a boot with the new kernel.

Description of problem:
Prior to upgrading Fedora I usually try the future kernel to verify basic hardware compatibility.  I upgraded my F10 Thinkpad x61t to from Koji and discovered that I could no longer connect or even see to my 802.11a wireless access point using the internal 4965AGN wireless card.  802.11b networks appeared in the list as normal.

I didn't notice any obvious warnings or errors in the logs or dmesg.

Version-Release number of selected component (if applicable):
Linux version (mockbuild@xenbuilder2.fedora.redhat.com) (gcc version 4.4
.0 20090506 (Red Hat 4.4.0-4) (GCC) ) #1 SMP Tue Jun 2 17:21:41 EDT 2009

(this firmware works fine with my F10 kernel)

How reproducible:
Upgrade to kernel- and observe that only 802.11b is working

Steps to Reproduce:
0. Obtain x61t with intel 4965 wireless card and an 802.11a network.
1. Upgrade to kernel-
2. Discover that you can't see your 802.11a AP but you can see 802.11b APs.
3. Be grateful that you tried the new kernel before upgrading Fedora.
Actual results:
It doesn't work.

Expected results:
It works.

Additional info:

iwlist freq output:
wlan1     11 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Current Frequency:2.437 GHz (Channel 6)

iwconfig output:
wlan1     IEEE 802.11abgn  ESSID:"NETGEAR"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: Not-Associated   
          Tx-Power=14 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B   
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
("NETGEAR" is one of the neighbours APs, I guess)

full dmesg of the boot is attached.
Comment 1 John W. Linville 2009-06-08 11:25:43 EDT
"cfg80211: Calling CRDA to update world regulatory domain"

You should install the crda package:

   yum install crda

Also, ensure that you have set your timezone correctly with system-config-date -- the timezone is used to select the appropriate regulatory domain.

Once crda is installed, "iw reg set US" (or other 2-letter country code as appropriate) should get things working OK for you.
Comment 2 Gregory Maxwell 2009-06-08 11:37:41 EDT
Thank you so much for the prompt and helpful response. Your suggestion resolved my problem.

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