[Bug 459625] [NEW] wi-fi recognized but sometimes is not enabled

Launchpad Bug Tracker 459625 at bugs.launchpad.net
Mon Oct 11 17:57:44 UTC 2010 

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i have a notebook with a wifi card integrated. this works on ubuntu 9.04 but not in 9.10rc! i thought that it was just karmic but it seems that the problem is the new kernel 2.6.31. it's all ok until 2.6.30,but with this newest it doesn't work anymore. it seems that,thanks to command line on the terminal,the card is recognized but i cannot enable the wireless! rebooting various times,on the contrary,it works. rebooting again it doesn't work again!
i tried to use ubuntu kernel 2.6.31 on ubuntu jaunty and the problem is the same.


lspci:
00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)
00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)
00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)
00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)
00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)
00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:05.0 VGA compatible controller: nVidia Corporation C51 [GeForce Go 6100] (rev a2)
00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a3)
00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a3)
00:0a.3 Co-processor: nVidia Corporation MCP51 PMU (rev a3)
00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1)
00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a3)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01)

sudo lshw -C network:
WARNING: you should run this program as super-user.
  *-network
       description: Wireless interface
       product: AR242x 802.11abg Wireless PCI Express Adapter
       vendor: Atheros Communications Inc.
       physical id: 0
       bus info: pci at 0000:01:00.0
       logical name: wmaster0
       version: 01
       serial: 00:15:af:2b:b9:98
       width: 64 bits
       clock: 33MHz
       capabilities: bus_master cap_list logical ethernet physical wireless
       configuration: broadcast=yes driver=ath5k_pci ip=192.168.1.64 latency=0 module=ath5k multicast=yes wireless=IEEE 802.11bg
  *-network DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: pan0
       serial: b2:eb:93:68:1b:df
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A multicast=yes

ubuntu at ubuntu:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11bg ESSID:""
          Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
          Tx-Power=off
          Retry long limit:7 RTS thr:off Fragment thr:off
          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

pan0 no wireless extensions.

ubuntu at ubuntu:~$ sudo tail /var/log/messages
Oct 21 08:14:40 ubuntu kernel: [ 219.130834] EXT4-fs (sda7): barriers enabled
Oct 21 08:14:40 ubuntu kernel: [ 219.149814] kjournald2 starting: pid 2771, dev sda7:8, commit interval 5 seconds
Oct 21 08:15:53 ubuntu kernel: [ 219.149875] EXT4-fs (sda7): warning: maximal mount count reached, running e2fsck is recommended
Oct 21 08:15:54 ubuntu kernel: [ 219.150112] EXT4-fs (sda7): internal journal on sda7:8
Oct 21 08:15:54 ubuntu kernel: [ 219.150121] EXT4-fs (sda7): delayed allocation enabled
Oct 21 08:15:54 ubuntu kernel: [ 219.150128] EXT4-fs: file extents enabled
Oct 21 08:15:54 ubuntu kernel: [ 219.190192] EXT4-fs: mballoc enabled
Oct 21 08:15:54 ubuntu kernel: [ 219.190249] EXT4-fs (sda7): mounted filesystem with ordered data mode
Oct 21 08:15:54 ubuntu kernel: [ 290.264081] usb 2-8: new full speed USB device using ohci_hcd and address 2
Oct 21 08:15:54 ubuntu kernel: [ 290.569362] usb 2-8: configuration #1 chosen from 1 choice

ubuntu at ubuntu:~$ sudo iwlist wlan0 scan
wlan0 Interface doesn't support scanning : Network is down

ubuntu at ubuntu:~$ sudo ifconfig wlan0 up
SIOCSIFFLAGS: Unknown error 132

ubuntu at ubuntu:~$ cat /var/log/messages | grep ath
Oct 22 18:37:31 ubuntu kernel: [ 2.618124] device-mapper: multipath: version 1.1.0 loaded
Oct 22 18:37:31 ubuntu kernel: [ 2.618126] device-mapper: multipath round-robin: version 1.0.0 loaded
Oct 22 18:37:39 ubuntu kernel: [ 91.823097] ath5k 0000:01:00.0: PCI INT A -> Link[LNEB] -> GSI 19 (level, low) -> IRQ 19
Oct 22 18:37:39 ubuntu kernel: [ 91.823154] ath5k 0000:01:00.0: registered as 'phy0'
Oct 22 18:37:42 ubuntu kernel: [ 94.393891] ath5k phy0: Atheros AR5414 chip found (MAC: 0xa0, PHY: 0x61)

ubuntu at ubuntu:~$ cat /var/log/messages | grep wlan
Oct 22 18:37:45 ubuntu kernel: [ 97.533914] ADDRCONF(NETDEV_UP): wlan0: link is not ready

ubuntu at ubuntu:~$ sudo ifconfig wlan0 up
SIOCSIFFLAGS: Unknown error 132
ubuntu at ubuntu:~$ cat /var/log/messages | grep wlan
Oct 23 09:12:36 ubuntu kernel: [ 98.694502] ADDRCONF(NETDEV_UP): wlan0: link is not ready
ubuntu at ubuntu:~$ sudo tail /sys/class/rfkill/*/{state,name,type,persistent}
==> /sys/class/rfkill/rfkill0/state <==
2

==> /sys/class/rfkill/rfkill0/name <==
phy0

==> /sys/class/rfkill/rfkill0/type <==
wlan

==> /sys/class/rfkill/rfkill0/persistent <==
0

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: atheros enable wifi wireless
-- 
wi-fi recognized but sometimes is not enabled
https://bugs.launchpad.net/bugs/459625
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