Can't hard block/unblock Atheros wi-fi card

Hi, since kernel version 3.6 I have a problem regarding my wi fi card: if I deactivate it from another OS I can't re-activate it, and when it is working I can't power it fully off (the led remains lighted).
So, it seems the hard block/unblock is impossible; if I use the key shortcut it's only soft-blocked (or unblocked).
I have a Asus eeepc 1215b, but the problem exists also on two others similar laptops; the involved card are the AR9285 and the AR9485 on mini pci-e.
The last working kernel was 3.5.6-1.
lsmod | grep -i ath9k
ath9k 100775 0
ath9k_common 2096 1 ath9k
ath9k_hw 359706 2 ath9k_common,ath9k
ath 15393 3 ath9k_common,ath9k,ath9k_hw
mac80211 463393 1 ath9k
cfg80211 430289 3 ath,ath9k,mac80211
dmesg | grep -i wlp1s0
[ 3.433341] systemd-udevd[122]: renamed network interface wlan0 to wlp1s0
[ 4.616939] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 13.931956] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 14.146404] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 17.410188] wlp1s0: authenticate with 00:24:89:1c:3f:93
[ 17.422892] wlp1s0: send auth to 00:24:89:1c:3f:93 (try 1/3)
[ 17.425189] wlp1s0: authenticated
[ 17.425506] wlp1s0: associate with 00:24:89:1c:3f:93 (try 1/3)
[ 17.428675] wlp1s0: RX AssocResp from 00:24:89:1c:3f:93 (capab=0x411 status=0 aid=1)
[ 17.428851] wlp1s0: associated
[ 17.428937] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
Thansk and sorry for any mistake

I checked on kernel.org changelogs between 3.5.6 and 3.6.11, and I found 4 references for ath9k:
1) The most interesting: https://www.kernel.org/pub/linux/kernel … eLog-3.6.1
ath9k: Disable ASPM only for AR9285
Currently, ASPM is disabled for all WLAN+BT combo chipsets when BTCOEX is enabled. This is incorrect since the workaround is required only for WB195, which is a AR9285+AR3011 combo solution. Fix this by checking for the HW version when enabling the workaround.
From wikipedia: "ASPM is a power management protocol used to manage PCI Express-based serial link devices as links become less active over time. It is normally used on laptops and other mobile Internet devices to extend battery life."
Maybe is this? BTW, the problem exists also with the AR9485...
2) https://www.kernel.org/pub/linux/kernel … eLog-3.6.3
ath9k: use ieee80211_free_txskb
commit 249ee72249140fe5b9adc988f97298f0aa5db2fc upstream.
Using ieee80211_free_txskb for tx frames is required, since mac80211 clones
skbs for which socket tx status is requested.
3) https://www.kernel.org/pub/linux/kernel … eLog-3.6.5
Revert "ath9k_hw: Updated AR9003 tx gain table for 5GHz"
commit 73b26df5fa1a6245d6fc982362518b620bc7c2fe upstream.
This reverts commit a240dc7b3c7463bd60cf0a9b2a90f52f78aae0fd.
This commit is reducing tx power by at least 10 db on some devices,
e.g. the Buffalo WZR-HP-G450H.
4) https://www.kernel.org/pub/linux/kernel … eLog-3.6.7
cfg80211: fix antenna gain handling
commit c4a9fafc77a5318f5ed26c509bbcddf03e18c201 upstream.
No driver initializes chan->max_antenna_gain to something sensible, and
the only place where it is being used right now is inside ath9k. This
leads to ath9k potentially using less tx power than it can use, which can
decrease performance/range in some rare cases.
Rather than going through every single driver, this patch initializes
chan->orig_mag in wiphy_register(), ignoring whatever value the driver
left in there. If a driver for some reason wishes to limit it independent
from regulatory rulesets, it can do so internally.
Any idea?

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Hello,
Sorry for my "English"..I'm French :-)
I bought recently an Lenovo Yoga 2 13 inch.
Since few days, Windows doesn't let me activate my Wifi card.
It is well configured...it's a REALTEK card inside.
I use now an USB ethernet adapter to have access to Internet (and to have the capacity to create a post on this forum ).
I don't remember exactly when this occured.
I think it was after the "tablet mode" but I'm not sure of that because I tried that before and that worked.
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With this last point, I think the problem is at the hard level.
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root@ubuntu:~# rfkill list
0: ideapad_wlan: Wireless LAN
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1: ideapad_bluetooth: Bluetooth
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   Hard blocked: yes
2: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
root@ubuntu:~# rfkill unblock all
root@ubuntu:~# rfkill list
0: ideapad_wlan: Wireless LAN
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   Hard blocked: yes
1: ideapad_bluetooth: Bluetooth
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2: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
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The card is still "Hard blocked".
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Solved!
Go to Solution.

mine has intel card and had the same issue. and i accidently fixed mine today.
I first tried with livecd fedora 20 , and tried rfkill method but did not seem to fix. tried to update the kernel but could not because the limitation of livecd.
then i tried to do full installation of fedora 20 to a usb, booted up with the usb , did kernel update, install rfkill, installed kernel-devel (which i planned to use for compiling ideapad-laptop fix ) then rebooted the laptop into new kernel.
When I was about to compile the ideapad-laptop fix that posted around the internet, i ran 'rfkill list all' to check the status, magically all blocks were gone, and my laptop wifi started working again. I don't have any logical explaination for what happened. just posted here hopefully it will help someone here.
i feel the agony everyone has with this issue, and lenovo support and response is extremely disappointing.
To summary what I did.
installed FC20 livecd to usb A
boot from usb A to do full install to usb B
boot from usb B , update kernek, install rfkill and kernel-devel
reboot from usb B with updated kernel
suddenly , 'rfkill list all' shows all blocks are gone.
still no logical explaination how this solved the issue.

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this is my 3d arch install. i kept notes, and followed them exactly and this time i've ran into an issue i just cannot seem to debug myself.
this laptop is the hp envy 4 1130us. i also have the hp envy 6t-1000 with arch installed and this is not a problem at all for that version of the computer (one is my personal the other is my work machine).
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[~]── - lspci -k (edited for brevity)
01:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0a)
Subsystem: Hewlett-Packard Company Device 1894
Kernel driver in use: r8169
Kernel modules: r8169
02:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)
Subsystem: Intel Corporation Centrino Wireless-N 2230 BGN
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
link/ether 28:92:4a:1c:0c:af brd ff:ff:ff:ff:ff:ff
3: wlo1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 68:5d:43:b1:d3:89 brd ff:ff:ff:ff:ff:ff
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[ 7.245934] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
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yeah,
i was thinking that recompiling each kernel would be a huge hassle as well.
so i just booted 2 live usb disks.
the 1st, the arch installer - the wifi was still hard blocked.
the 2nd, debian / crunchbang. what's odd, is that in debian the wifi key light is while (enabled) but it's still blocked. if the press the button it turns amber (disabled), if i press it again it turns white again and is actually enabled.
it almost seems like arch is not "catching" the action keypress. the keyboard backlight key works out of the box, and so does the screen brightness keys. but i run xfce4-volumed to control the volume related keys. is there anyway to emulate the hardware keypress to even see if that's the issue?
-----------------[update]-----------------
so i decided to try and enable the rfkill unblock all service:
systemctl enable [email protected]
that alone didn't work, but... i booted into another os, enabled wifi, then hard powered off the laptop. when i rebooted into arch it seems to work now. it's a really hacky work-around. but i'll take it. i'd really like a proper solution, but it works for now i guess.
Last edited by xero (2014-07-24 19:34:53)

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