Arch Linux

It seems many people have this problem, ubuntu,gentoo,fedora, may be is the problem of kernel

[xxx@hu-hdd ~]$ sudo ifconfig wlan0 up
SIOCSIFFLAGS: Operation not possible due to RF-kil
[xxx@hu-hdd ~]$ sudo rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes

then i close my hard switch

[xxx@hu-hdd ~]$ sudo rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: ideapad_bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: yes
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes

then open hard switch
[xxx@hu-hdd ~]$ sudo rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes

my wifi card is athero AR9285
this is my hardware
[xxx@hu-hdd ~]$ sudo lshw
hu-hdd
description: Notebook
product: IdeaPad Y460 ()
vendor: LENOVO
version: Rev 1.0
serial: QB01764707
width: 64 bits
capabilities: smbios-2.6 dmi-2.6 vsyscall64 vsyscall32
configuration: boot=normal chassis=notebook uuid=A66E568D-8100-E72E-BFF3-203040506099
*-core
description: Motherboard
product: KL2
vendor: Lenovo
physical id: 0
version: Rev 1.0
serial: QB01764707
*-firmware
description: BIOS
vendor: LENOVO
physical id: 0
version: 27CN71WW
date: 01/27/2011
size: 108KiB
capacity: 1984KiB
capabilities: isa pci pcmcia pnp upgrade shadowing escd cdboot bootselect int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification
*-cpu
description: CPU
product: Intel(R) Core(TM) i5 CPU M 460 @ 2.53GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: Genuine Intel(R) CPU
slot: CPU 1
size: 1199MHz
capacity: 3200MHz
width: 64 bits
clock: 133MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida arat tpr_shadow vnmi flexpriority ept vpid cpufreq
configuration: cores=2 enabledcores=2 threads=4
*-cache:0
description: L1 cache
physical id: 5
slot: L1 Cache
size: 32KiB
capacity: 32KiB
capabilities: asynchronous internal write-through data
*-cache:1
description: L2 cache
physical id: 6
slot: L2 Cache
size: 256KiB
capacity: 1MiB
capabilities: burst internal write-through unified
*-cache:2
description: L3 cache
physical id: 7
slot: L3 Cache
size: 3MiB
capacity: 8MiB
capabilities: burst internal write-back
*-memory
description: System Memory
physical id: f
slot: System board or motherboard
size: 4GiB
*-bank:0
description: SODIMM DDR3 Synchronous 667 MHz (1.5 ns)
product: M471B5673FH0-CH9
vendor: Samsung
physical id: 0
serial: 6784A438
slot: M1
size: 2GiB
width: 64 bits
clock: 667MHz (1.5ns)
*-bank:1
description: SODIMM DDR3 Synchronous 533 MHz (1.9 ns)
product: 16JSF25664HZ-1G1F1
vendor: Micron Technology
physical id: 1
serial: E2684ACE
slot: M2
size: 2GiB
width: 64 bits
clock: 533MHz (1.9ns)
*-pci:0
description: Host bridge
product: Core Processor DRAM Controller
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 18
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel
resources: irq:0
*-pci:0
description: PCI bridge
product: Core Processor PCI Express x16 Root Port
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 18
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:40 ioport:2000(size=4096) memory:ca000000-cbefffff ioport:e0000000(size=301989888)
*-display UNCLAIMED
description: VGA compatible controller
product: nVidia Corporation
vendor: nVidia Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list
configuration: latency=0
resources: memory:ca000000-caffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:2000(size=128) memory:cb000000-cb07ffff
*-multimedia
description: Audio device
product: GF108 High Definition Audio Controller
vendor: nVidia Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=HDA Intel latency=0
resources: irq:17 memory:cbefc000-cbefffff
*-display
description: VGA compatible controller
product: Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 18
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:41 memory:c9800000-c9bfffff memory:d0000000-dfffffff ioport:1800(size=8)
*-communication UNCLAIMED
description: Communication controller
product: 5 Series/3400 Series Chipset HECI Controller
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: latency=0
resources: memory:c8cfa400-c8cfa40f
*-usb:0
description: USB Controller
product: 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
vendor: Intel Corporation
physical id: 1a
bus info: pci@0000:00:1a.0
version: 06
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:16 memory:c8cf9c00-c8cf9fff
*-multimedia
description: Audio device
product: 5 Series/3400 Series Chipset High Definition Audio
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=HDA Intel latency=0
resources: irq:43 memory:c8cfc000-c8cfffff
*-pci:1
description: PCI bridge
product: 5 Series/3400 Series Chipset PCI Express Root Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 06
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:3000(size=4096) memory:c9c00000-c9dfffff ioport:f4000000(size=67108864)
*-generic:0 UNCLAIMED
description: System peripheral
product: SD/MMC Host Controller
vendor: JMicron Technology Corp.
physical id: 0
bus info: pci@0000:03:00.0
version: 20
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi bus_master cap_list
configuration: latency=0
resources: memory:c9cff000-c9cff0ff memory:f4000000-f400ffff
*-generic:1
description: SD Host controller
product: Standard SD Host Controller
vendor: JMicron Technology Corp.
physical id: 0.2
bus info: pci@0000:03:00.2
version: 20
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi bus_master cap_list
configuration: driver=sdhci-pci latency=0
resources: irq:16 memory:c9dffc00-c9dffcff
*-generic:2
description: System peripheral
product: MS Host Controller
vendor: JMicron Technology Corp.
physical id: 0.3
bus info: pci@0000:03:00.3
version: 20
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi bus_master cap_list
configuration: driver=jmb38x_ms latency=0
resources: irq:16 memory:c9dff800-c9dff8ff
*-generic:3 UNCLAIMED
description: System peripheral
product: xD Host Controller
vendor: JMicron Technology Corp.
physical id: 0.4
bus info: pci@0000:03:00.4
version: 20
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi bus_master cap_list
configuration: latency=0
resources: memory:c9dff400-c9dff4ff
*-pci:2
description: PCI bridge
product: 5 Series/3400 Series Chipset PCI Express Root Port 2
vendor: Intel Corporation
physical id: 1c.1
bus info: pci@0000:00:1c.1
version: 06
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 ioport:5000(size=4096) memory:c9100000-c91fffff ioport:c0000000(size=2097152)
*-network DISABLED
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlan0
version: 01
serial: 5c:ac:4c:96:37:35
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=2.6.38-ARCH firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:c91f0000-c91fffff
*-pci:3
description: PCI bridge
product: 5 Series/3400 Series Chipset PCI Express Root Port 4
vendor: Intel Corporation
physical id: 1c.3
bus info: pci@0000:00:1c.3
version: 06
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:19 ioport:4000(size=4096) memory:c9400000-c95fffff ioport:cc000000(size=67108864)
*-pci:4
description: PCI bridge
product: 5 Series/3400 Series Chipset PCI Express Root Port 5
vendor: Intel Corporation
physical id: 1c.4
bus info: pci@0000:00:1c.4
version: 06
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:6000(size=4096) memory:c8f00000-c8ffffff ioport:c0200000(size=2097152)
*-network
description: Ethernet interface
product: NetLink BCM57780 Gigabit Ethernet PCIe
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:09:00.0
logical name: eth0
version: 01
serial: 60:eb:69:55:82:f7
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.116 duplex=full firmware=sb v2.07 ip=10.0.33.166 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:44 memory:c8ff0000-c8ffffff
*-usb:1
description: USB Controller
product: 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 06
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:23 memory:c8cf9800-c8cf9bff
*-pci:5
description: PCI bridge
product: 82801 Mobile PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: a6
width: 32 bits
clock: 33MHz
capabilities: pci subtractive_decode bus_master cap_list
*-isa
description: ISA bridge
product: Mobile 5 Series Chipset LPC Interface Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 06
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: latency=0
*-storage
description: SATA controller
product: 5 Series/3400 Series Chipset 4 port SATA AHCI Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
logical name: scsi1
logical name: scsi4
version: 06
width: 32 bits
clock: 66MHz
capabilities: storage msi pm ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=0
resources: irq:42 ioport:1818(size=8) ioport:180c(size=4) ioport:1810(size=8) ioport:1808(size=4) ioport:1820(size=32) memory:c8cfa800-c8cfafff
*-disk
description: ATA Disk
product: WDC WD5000BEVT-2
vendor: Western Digital
physical id: 0
bus info: scsi@1:0.0.0
logical name: /dev/sda
version: 01.0
serial: WD-WXE1A80A2100
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=8ff270f2
*-volume:0
description: Windows NTFS volume
physical id: 1
bus info: scsi@1:0.0.0,1
logical name: /dev/sda1
version: 3.1
serial: eefc-087a
size: 98MiB
capacity: 100MiB
capabilities: primary bootable ntfs initialized
configuration: clustersize=4096 created=2010-12-03 14:40:32 filesystem=ntfs label=系统保留 state=clean
*-volume:1
description: Windows NTFS volume
physical id: 2
bus info: scsi@1:0.0.0,2
logical name: /dev/sda2
logical name: /media/B8B86795B8675144
version: 3.1
serial: 848f673f-a3a9-1d43-9f45-e13196208543
size: 58GiB
capacity: 58GiB
capabilities: primary ntfs initialized
configuration: clustersize=4096 created=2010-12-03 14:43:31 filesystem=ntfs mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted
*-volume:2
description: Extended partition
physical id: 3
bus info: scsi@1:0.0.0,3
logical name: /dev/sda3
size: 407GiB
capacity: 407GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume:0
description: HPFS/NTFS partition
physical id: 5
logical name: /dev/sda5
logical name: /media/000186EB000155DB
capacity: 150GiB
configuration: mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted
*-logicalvolume:1
description: HPFS/NTFS partition
physical id: 6
logical name: /dev/sda6
capacity: 150GiB
*-logicalvolume:2
description: HPFS/NTFS partition
physical id: 7
logical name: /dev/sda7
logical name: /media/000858A9000B6301
capacity: 62GiB
configuration: mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted
*-logicalvolume:3
description: FAT16 partition
physical id: 8
logical name: /dev/sda8
capacity: 300MiB
*-logicalvolume:4
description: FAT16 partition
physical id: 9
logical name: /dev/sda9
capacity: 19GiB
*-logicalvolume:5
description: FAT16 partition
physical id: a
logical name: /dev/sda10
capacity: 20GiB
*-logicalvolume:6
description: FAT16 partition
physical id: b
logical name: /dev/sda11
capacity: 3998MiB
*-cdrom
description: DVD-RAM writer
product: DVD A DS8A4S
vendor: Slimtype
physical id: 1
bus info: scsi@4:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrom0
logical name: /dev/cdrw
logical name: /dev/cdrw0
logical name: /dev/dvd
logical name: /dev/dvd0
logical name: /dev/dvdrw
logical name: /dev/dvdrw0
logical name: /dev/scd0
logical name: /dev/sr0
version: JL61
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
*-serial UNCLAIMED
description: SMBus
product: 5 Series/3400 Series Chipset SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 06
width: 64 bits
clock: 33MHz
configuration: latency=0
resources: memory:c8cf9400-c8cf94ff ioport:1840(size=32)
*-generic
description: Signal processing controller
product: 5 Series/3400 Series Chipset Thermal Subsystem
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
version: 06
width: 64 bits
clock: 33MHz
capabilities: pm msi cap_list
configuration: driver=intel ips latency=0
resources: irq:18 memory:c8cfb000-c8cfbfff
*-pci:1
description: Host bridge
product: Core Processor QuickPath Architecture Generic Non-core Registers
vendor: Intel Corporation
physical id: 101
bus info: pci@0000:3f:00.0
version: 05
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: Core Processor QuickPath Architecture System Address Decoder
vendor: Intel Corporation
physical id: 102
bus info: pci@0000:3f:00.1
version: 05
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: Core Processor QPI Link 0
vendor: Intel Corporation
physical id: 103
bus info: pci@0000:3f:02.0
version: 05
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: Core Processor QPI Physical 0
vendor: Intel Corporation
physical id: 104
bus info: pci@0000:3f:02.1
version: 05
width: 32 bits
clock: 33MHz
*-pci:5
description: Host bridge
product: Core Processor Reserved
vendor: Intel Corporation
physical id: 105
bus info: pci@0000:3f:02.2
version: 05
width: 32 bits
clock: 33MHz
*-pci:6
description: Host bridge
product: Core Processor Reserved
vendor: Intel Corporation
physical id: 106
bus info: pci@0000:3f:02.3
version: 05
width: 32 bits
clock: 33MHz
*-scsi
physical id: 1
bus info: usb@1:1.2
logical name: scsi6
capabilities: emulated scsi-host
configuration: driver=usb-storage
*-disk
description: SCSI Disk
physical id: 0.0.0
bus info: scsi@6:0.0.0
logical name: /dev/sdb
size: 298GiB (320GB)
capabilities: partitioned partitioned:dos
configuration: signature=c0b7f4d3
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@6:0.0.0,1
logical name: /dev/sdb1
logical name: /boot
version: 1.0
serial: 919c61da-efb0-4734-b308-949862c87498
size: 517MiB
capacity: 517MiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink extents ext4 ext2 initialized
configuration: created=2010-03-10 18:51:20 filesystem=ext4 lastmountpoint=/boot modified=2011-04-14 00:11:26 mount.fstype=ext4 mount.options=rw,relatime,barrier=1,data=ordered mounted=2011-04-13 19:16:50 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@6:0.0.0,2
logical name: /dev/sdb2
size: 297GiB
capacity: 297GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume:0
description: HPFS/NTFS partition
physical id: 5
logical name: /dev/sdb5
logical name: /media/HU1
capacity: 100GiB
configuration: mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted
*-logicalvolume:1
description: HPFS/NTFS partition
physical id: 6
logical name: /dev/sdb6
logical name: /media/HU2
capacity: 140GiB
configuration: mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted
*-logicalvolume:2
description: Linux filesystem partition
physical id: 7
logical name: /dev/sdb7
logical name: /home
capacity: 30GiB
configuration: mount.fstype=ext4 mount.options=rw,relatime,barrier=1,data=ordered state=mounted
*-logicalvolume:3
description: Linux filesystem partition
physical id: 8
logical name: /dev/sdb8
logical name: /
capacity: 24GiB
configuration: mount.fstype=ext4 mount.options=rw,relatime,barrier=1,data=ordered state=mounted
*-logicalvolume:4
description: Linux swap / Solaris partition
physical id: 9
logical name: /dev/sdb9
capacity: 3616MiB
capabilities: nofs