Bug 96761 - ath9k Antenna selection not working. - Linux 4.0
Summary: ath9k Antenna selection not working. - Linux 4.0
Status: NEW
Alias: None
Product: Networking
Classification: Unclassified
Component: Wireless (show other bugs)
Hardware: ARM Linux
: P1 normal
Assignee: networking_wireless@kernel-bugs.osdl.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-04-16 07:56 UTC by Thomas Graf
Modified: 2015-04-16 07:56 UTC (History)
0 users

See Also:
Kernel Version: 4.0
Subsystem:
Regression: No
Bisected commit-id:

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Description Thomas Graf 2015-04-16 07:56:48 UTC 
I use a Atheros wireless lan card (Connectors for CH0 and CH1) with the ath9k driver.

lspci
00:00.0 Class 0604: 16c3:abcd
01:00.0 Class 0280: 168c:0030

I'm setting the antenna to only the second (CH1) antenna only with the command:

iw phy phy0 set antenna 0x2 0x2

Reading out
/sys/kernel/debug/ieee80211/phy0/ath9k/rx_chainmask
/sys/kernel/debug/ieee80211/phy0/ath9k/tx_chainmask
and "iw list" indicates that antenna 2 (CH1) is selected.

The reported SNR is around 0dBm - and no connection is possible. The same with antenna 1 (CH0) is working like expected.

The same was working with 3.18. Using the new stable kernel version 4.0 it's not working anymore.
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