FS#38988 - [linux] 3.13 missing 5ghz band from Qualcomm Atheros AR93xx

Attached to Project: Arch Linux
Opened by Britt Yazel (brittyazel) - Friday, 21 February 2014, 23:36 GMT
Last edited by Thomas Bächler (brain0) - Saturday, 22 February 2014, 08:45 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Tobias Powalowski (tpowa)
Thomas Bächler (brain0)
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
With the upgrade to Linux 3.13 this morning my Qualcomm Atheros AR93xx Wireless Network Adapter lost it's 5ghz functionality and can now only see and connect to 2.4ghz bands.
This task depends upon

Closed by  Thomas Bächler (brain0)
Saturday, 22 February 2014, 08:45 GMT
Reason for closing:  Not a bug
Comment by Britt Yazel (brittyazel) - Friday, 21 February 2014, 23:37 GMT
I do not know what files to attach for further information, please advise.
Comment by Thomas Bächler (brain0) - Saturday, 22 February 2014, 01:21 GMT
I have a similar device, but I didn't check for visible networks at work, so I can't say if I am affected until Monday. The output of 'iw list' would be useful.
Comment by Phil Puryear (philpuryear) - Saturday, 22 February 2014, 02:36 GMT
I have the same adapter and the same issue with kernel 3.13. I've attached my 'iw list' output in case it helps.
   iw-list.txt (5.3 KiB)
Comment by Phil Puryear (philpuryear) - Saturday, 22 February 2014, 02:43 GMT
On a hunch, I installed 'crda' and set my regulatory domain to US (where I live), which solved the problem. This was not necessary on kernel 3.12 and earlier.
Comment by Britt Yazel (brittyazel) - Saturday, 22 February 2014, 06:16 GMT
I can confirm that installing crda and commenting the appropriate region (US for me) in /etc/conf.d/wireless-regdom brought back my 5ghz signal. I have not idea why though. Good call Phil Puryear
Comment by Thomas Bächler (brain0) - Saturday, 22 February 2014, 08:45 GMT
Likely, the kernel's built-in default world regulatory domain is now more restrictive than before. Installing crda and setting your region is recommended regardless.

Loading...