Questions[intel-wireless](ubuntu)

I'm running Ubuntu 18.04 on a Dell Precision M6400. When first installed 18.04, WiFi was running fine. After automatic update, it doesn't any more. WLan spots are displayed correctly, but when trying to connect it fails after about 1 min, a message appears: Connection failed. Updated and upgraded already, but no success. Looks, like the driver / firmware is no more correct after update. Any hints?

$ lspci -knn | grep -i net -A3
09:00.0 Ethernet controller [0200]: Broadcom Limited NetXtreme BCM5761e Gigabit Ethernet PCIe [14e4:1680] (rev 10)
    Subsystem: Dell NetXtreme BCM5761e Gigabit Ethernet PCIe [1028:0251]
    Kernel driver in use: tg3
    Kernel modules: tg3
0c:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
    Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1321]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

--

$ rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: dell-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
3: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

$ uname -r
4.15.0-33-generic

After switching back to kernel 4.15.0.32.35 it doesn't detect the wifi adapter resp. doesn't start up the driver iwlwifi.

$ lspci -knn | grep -i net -A3
09:00.0 Ethernet controller [0200]: Broadcom Limited NetXtreme BCM5761e
Gigabit Ethernet PCIe [14e4:1680] (rev 10)
    Subsystem: Dell NetXtreme BCM5761e Gigabit Ethernet PCIe [1028:0251]
    Kernel driver in use: tg3
    Kernel modules: tg3
0c:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
    Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1321]

$ rfkill list
$

my wifi drops after some time and requires reboot to work again ( Centrino Wireless-N 1030 [Rainbow Peak])

similar question was posted by me for 14.04

intel centrino wireless n 1030 wireless drop after reboot Ubuntu 14.04

sudo lshw -C network gives

 *-network    

       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: enp5s0
       version: 06
       serial: 24:b6:fd:27:e1:b8
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8168e-2.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:30 ioport:e000(size=256) memory:f1104000-f1104fff memory:f1100000-f1103fff 
 *-network

       description: Wireless interface
       product: Centrino Wireless-N 1030 [Rainbow Peak]


       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: wlp9s0
       version: 34
       serial: 4c:eb:42:32:c2:2e
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.13.0-45-generic firmware=18.168.6.1 ip=192.168.1.31 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:34 memory:f7e00000-f7e01fff

have edited the /etc/modpobe.d/iwlwifi.conf to add the line

options iwlwifi 11n_disable=1 iwlwifi bt_coex_active=0

didnt work

have checked /lib/firmware for the file iwlwifi-6000g2b-6

it exists .( this was from https://www.intel.in/content/www/in/en/support/articles/000005511/network-and-i-o/wireless-networking.html)

dmesg | grep iwl gives

[   14.721093] iwlwifi: unknown parameter 'iwlwifi' ignored
[   14.974997] iwlwifi 0000:09:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[   14.998377] iwlwifi 0000:09:00.0: CONFIG_IWLWIFI_DEBUG disabled
[   14.998380] iwlwifi 0000:09:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[   14.998382] iwlwifi 0000:09:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[   14.998385] iwlwifi 0000:09:00.0: Detected Intel(R) Centrino(R) Wireless-N 1030 BGN, REV=0xB0
[   15.035360] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[   16.149840] iwlwifi 0000:09:00.0 wlp9s0: renamed from wlan0
[   22.513003] iwlwifi 0000:09:00.0: Radio type=0x2-0x2-0x1
[   22.615238] iwlwifi 0000:09:00.0: Radio type=0x2-0x2-0x1

sudo iwconfig gives

lo        no wireless extensions.

wlp9s0    IEEE 802.11  ESSID:"HTC Portable Hotspot 4AEF"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 80:7A:BF:B9:8F:D5   
          Bit Rate=54 Mb/s   Tx-Power=15 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-38 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:120   Missed beacon:0

power management is disabled

sudo iwlist scan | egrep -i 'ssid|cipher' gives (refer)

Wifi keeps dropping on Dell XPS13 running Ubuntu 16.04, not sure how to use sudoedit on file

enp5s0    Interface doesn't support scanning.

lo        Interface doesn't support scanning.

                    ESSID:"HTC Portable Hotspot 4AEF"
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                    ESSID:"Nokia 8"
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP

sudo service network-manager restart doesnt work

shows this after I try reconnecting

requires reboot required after drop

also tried the following

16.04 LTS wifi connection issues with Realtek adapter

have replaced the adapters name . since it is RTL8111/8168/8411 and adding "/" with conf file cretes problems I chose a name with out "/"

wifi drops after few hours again

I have posted the output while wifi was connected have edited this question multiple times to add all the relevant things i did but issue still persists

my kernel version is 4.15.0-24-generic

please help

edit 2: update to kernel version 4.15.0-29-generic #31~16.04.1-Ubuntu SMP doesn't solve the issue

edit 3 : have set the region to IN issue persistent

edit 4 : installed wicd-client from help.ubuntu.com/community/WICD . disconnection continues and so switched back to network manager again issue is persistent

edit 5 : took a backup and installed Windows 7 for one day , wifi worked fine implying hardware is working fine

edit6 : contacted dell support in case to be sure to know if the card was ok .they ran diagnostic and assured hard ware is working fine

edit 7 : after all the efforts , I realized that there is something missing with respect to the linux kernel itself, and so i intalled r8168-dkms via synaptic packet manager and the wifi is up since 235 minutes but again the next day drop after 30 minutes of use

edit 8 : of all the above things that I have tried edit : 7 is the most stable, how ever I am not sure of the solution as disconnection persists

edit 9 : blacklisted r8169 by following in /etc/modprobe.d/r8168-dkms.conf

# if the aliases above do not work, uncomment the following line
# to blacklist the whole r8169 module
#blacklist r8169

by uncommenting as advised to

# if the aliases above do not work, uncomment the following line
# to blacklist the whole r8169 module
blacklist r8169

disconnection persists

edit 10 r8168 in edit 9 is for ethernet and not for wifi , from the link https://ubuntuforums.org/showthread.php?t=2391119

I did as advised, though for 18.04 but since the kernel version was same , I gave a try , didnt work !

edit 11 : as requested in the comment /etc/NetworkManager/NetworkManager.conf has

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

edit 12 : becoming root and performing

echo -e "[device]\nwifi.scan-rand-mac-address=0" >> /etc/NetworkManager/NetworkManager.conf && systemctl restart network-manager 

doesnt help

edit 13 : now the system fails to recognize the wifi adapter

edit 14 : running the following

dpkg-reconfigure linux-firmware
modprobe -r iwlwifi ; modprobe iwlwifi

doesn't help

edit 15 : changed the line from options iwlwifi 11n_disable=1 iwlwifi bt_coex_active=0 to

options iwlwifi 11n_disable=1 swcrypto=1` bt_coex_active=0 

in /etc/modprobe.d/iwlwifi.config
does not help.

I have recently installed Ubuntu 18.04 LTS, but I wouldn't get connected to the wifi as there was no wifi option. I checked /lib/firmware and my Intel AC 9260 wifi driver ucode was there, I tried downloading another one from Intel too but that didn't make a difference.

nvan@R2700x:~$ lspci -nnk | grep 0280 -A3`
    06:00.0 Network controller [0280]: Intel Corporation Device [8086:2526] (rev 29)
        Subsystem: Intel Corporation Device [8086:0014]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi

nvan@R2700x:~$ dmesg | grep iwl
[    4.583006] iwlwifi 0000:06:00.0: enabling device (0000 -> 0002)
[    4.596295] iwlwifi 0000:06:00.0: loaded firmware version 34.0.0 op_mode iwlmvm
[    4.615392] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 9260, REV=0x324
[    4.622171] kernel BUG at /build/linux-5s7Xkn/linux-4.15.0/drivers/net/wireless/intel/iwlwifi/pcie/rx.c:425!
[    4.622216] Modules linked in: snd_hda_intel amd64_edac_mod(-) snd_hda_codec iwlmvm(+) snd_hda_core edac_mce_amd kvm_amd(-) snd_hwdep mac80211 kvm snd_pcm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc snd_seq_midi snd_seq_midi_event snd_rawmidi iwlwifi aesni_intel aes_x86_64 crypto_simd glue_helper cryptd wmi_bmof snd_seq cfg80211 input_leds btusb snd_seq_device btrtl snd_timer btbcm btintel snd bluetooth soundcore ccp k10temp ecdh_generic mac_hid shpchp sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid nouveau mxm_wmi video ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops igb drm dca i2c_piix4 i2c_algo_bit ptp nvme ahci pps_core libahci nvme_core gpio_amdpt wmi gpio_generic
[    4.622335] RIP: 0010:iwl_pcie_rxq_alloc_rbs+0x1d0/0x1f0 [iwlwifi]
[    4.622403]  _iwl_pcie_rx_init+0x252/0x710 [iwlwifi]
[    4.622414]  iwl_pcie_rx_init+0x2d/0x3c0 [iwlwifi]
[    4.622436]  ? iwl_mvm_nic_config+0xeb/0x120 [iwlmvm]
[    4.622448]  iwl_trans_pcie_start_fw+0x2a1/0x6c0 [iwlwifi]
[    4.622462]  iwl_mvm_load_ucode_wait_alive+0xec/0x2b0 [iwlmvm]
[    4.622490]  iwl_run_init_mvm_ucode+0x8e/0x330 [iwlmvm]
[    4.622500]  ? iwl_run_init_mvm_ucode+0x8e/0x330 [iwlmvm]
[    4.622510]  ? iwl_wait_init_complete+0x20/0x20 [iwlmvm]
[    4.622523]  iwl_op_mode_mvm_start+0x649/0x920 [iwlmvm]
[    4.622536]  ? iwl_op_mode_mvm_start+0x649/0x920 [iwlmvm]
[    4.622546]  _iwl_op_mode_start.isra.10+0x4c/0xa0 [iwlwifi]
[    4.622556]  iwl_opmode_register+0x75/0xe0 [iwlwifi]
[    4.622573]  iwl_mvm_init+0x38/0x1000 [iwlmvm]
[    4.622739] RIP: iwl_pcie_rxq_alloc_rbs+0x1d0/0x1f0 [iwlwifi] RSP: ffffadbfc23fb8a8

Thank you for your help!
Sincerely,
Nick V

Update 1: I have tried to install the BackPort from this site backport-iwlwifi . However, I'm unable to install it due to lack of gcc. I also tried to install build-essential package, but without an internet connection, I'm clueless about how to proceed.

I am getting this error as a part of this problem here but since this problem is totally different issue I think it is better to consider this issue separately. My wlan0 is down. When I try to turn it on with

$  sudo ifconfig wlan0 up

SIOCSIFFLAGS: Operation not possible due to RF-kill

and then

$ sudo rfkill list all

0: phy0: Wireless LAN 

     Soft blocked: yes

     Hard blocked: no

1: tpacpi_bluetooth_sw: Bluetooth

     Soft blocked: yes

     Hard blocked: yes

What does the error msg mean? What is the RF-kill?

Hardware Specs

  $ sudo lshw -class network
  *-network
       description: Ethernet interface
       product: 82573L Gigabit Ethernet Controller
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 00
       serial: 00:16:d3:22:96:c2
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.2.20-k2 firmware=0.5-1 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:44 memory:ee000000-ee01ffff ioport:2000(size=32)
  *-network DISABLED
       description: Wireless interface
       product: PRO/Wireless 3945ABG [Golan] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 02
       serial: 00:13:02:46:63:74
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwl3945 driverversion=2.6.38-11-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11abg
       resources: irq:45 memory:edf00000-edf00fff

OS Version and Kernel Version

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"
$ uname -r
2.6.38-11-generic

[Update]

When I apply Fossfreedom's suggestion, I get "SIOCSIFFLAGS: No such device". The kernel is for some reason rejecting the card, as pointed by FF.

Dmesg after disabling and enabling wli3945, with Blocked WiFi

# modprobe -r iwl3945
# modprobe iwl3945
# dmesg|tail -n 50
[ 6835.430537] PM: resume of devices complete after 1889.701 msecs
[ 6835.430800] PM: resume devices took 1.888 seconds
[ 6835.430845] PM: Finishing wakeup.
[ 6835.430847] Restarting tasks ... done.
[ 6835.502666] video LNXVIDEO:00: Restoring backlight state
[ 6835.572203] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
[ 6835.852380] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6835.908162] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6835.908775] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6836.919274] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=600
[ 6837.769253] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=600
[ 6859.097311] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 6882.076501] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6882.132190] e1000e 0000:02:00.0: irq 46 for MSI/MSI-X
[ 6882.132924] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6883.722633] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[ 6883.722645] e1000e 0000:02:00.0: eth0: 10/100 speed: disabling TSO
[ 6883.723071] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 6894.000044] eth0: no IPv6 routers present
[ 6896.551932] exe (2743): /proc/2743/oom_adj is deprecated, please use /proc/2743/oom_score_adj instead.
[ 8289.212078] usb 1-2: new high speed USB device using ehci_hcd and address 4
[ 8289.280270] hub 1-0:1.0: unable to enumerate USB device on port 2
[ 8289.608059] usb 1-2: new high speed USB device using ehci_hcd and address 5
[ 8291.006963] usb 1-2: USB disconnect, address 5
[ 8291.308072] usb 1-2: new high speed USB device using ehci_hcd and address 6
[ 8291.591228] usb 1-2: USB disconnect, address 6
[ 9598.556083] usb 1-2: new high speed USB device using ehci_hcd and address 7
[ 9599.059441] usb 1-2: USB disconnect, address 7
[11838.072332] iwl3945 0000:03:00.0: Master Disable Timed Out, 100 usec
[11838.072993] iwl3945 0000:03:00.0: PCI INT A disabled
[11850.210319] cfg80211: Calling CRDA to update world regulatory domain
[11850.218431] cfg80211: World regulatory domain updated:
[11850.218436] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[11850.218440] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[11850.218444] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[11850.218448] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[11850.218452] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[11850.218456] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[11850.291510] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[11850.291515] iwl3945: Copyright(c) 2003-2010 Intel Corporation
[11850.291601] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[11850.291624] iwl3945 0000:03:00.0: setting latency timer to 64
[11850.331841] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[11850.331847] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[11850.332023] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[11850.332274] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain 
[11850.332436] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[11850.361710] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[11850.361885] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[11850.365924] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch

Dmesg with Unblocked WiFi

# rfkill list all
1: tpacpi_bluetooth_sw: Bluetooth
    Soft blocked: no
    Hard blocked: yes
2: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
# dmesg|tail -n 50
[   27.649606] fb0: inteldrmfb frame buffer device
[   27.649608] drm: registered panic notifier
[   27.649815] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[   27.662754] HDA Intel 0000:00:1b.0: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[   27.662760] hda_intel: probe_mask set to 0x1 for device 17aa:2010
[   27.662831] HDA Intel 0000:00:1b.0: irq 46 for MSI/MSI-X
[   27.662868] HDA Intel 0000:00:1b.0: setting latency timer to 64
[   27.769460] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x100-0x3af: excluding 0x170-0x177 0x1f0-0x1f7 0x2f8-0x2ff 0x370-0x377
[   27.774801] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x3e0-0x4ff: excluding 0x3f0-0x3f7 0x4d0-0x4d7
[   27.775742] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x820-0x8ff: clean.
[   27.788575] pcmcia_socket pcmcia_socket0: cs: IO port probe 0xc00-0xcf7: clean.
[   27.789382] pcmcia_socket pcmcia_socket0: cs: memory probe 0x0c0000-0x0fffff: excluding 0xc0000-0xd3fff 0xdc000-0xfffff
[   27.789466] pcmcia_socket pcmcia_socket0: cs: memory probe 0xa0000000-0xa0ffffff: clean.
[   27.789547] pcmcia_socket pcmcia_socket0: cs: memory probe 0x60000000-0x60ffffff: excluding 0x60000000-0x60ffffff
[   27.789632] pcmcia_socket pcmcia_socket0: cs: IO port probe 0xa00-0xaff: clean.
[   27.813146] e1000e 0000:02:00.0: irq 44 for MSI/MSI-X
[   27.868221] e1000e 0000:02:00.0: irq 44 for MSI/MSI-X
[   27.868866] ADDRCONF(NETDEV_UP): eth0: link is not ready
[   27.876620] IBM TrackPoint firmware: 0x0e, buttons: 3/3
[   27.892982] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/input/input6
[   28.121555] ppdev: user-space parallel port driver
[   29.426589] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[   29.426597] e1000e 0000:02:00.0: eth0: 10/100 speed: disabling TSO
[   29.426893] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   31.009483] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[   34.474875] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[   40.160038] eth0: no IPv6 routers present
[ 7394.332227] exe (1666): /proc/1666/oom_adj is deprecated, please use /proc/1666/oom_score_adj instead.
[ 7587.420396] iwl3945 0000:03:00.0: PCI INT A disabled
[ 7599.728554] cfg80211: Calling CRDA to update world regulatory domain
[ 7599.736628] cfg80211: World regulatory domain updated:
[ 7599.736632] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7599.736637] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736641] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736645] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736649] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736653] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.797314] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[ 7599.797319] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[ 7599.797397] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 7599.797419] iwl3945 0000:03:00.0: setting latency timer to 64
[ 7599.837714] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[ 7599.837719] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[ 7599.837880] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[ 7599.838124] Registered led device: phy0-led
[ 7599.838170] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain 
[ 7599.838335] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[ 7599.980440] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 7599.980656] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7599.983562] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch

Dmesg and Iwl3945 without Blocked WiFi

# modprobe -r iwl3945
# modprobe iwl3945
# dmesg| tail -n 50
[   29.426597] e1000e 0000:02:00.0: eth0: 10/100 speed: disabling TSO
[   29.426893] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   31.009483] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[   34.474875] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[   40.160038] eth0: no IPv6 routers present
[ 7394.332227] exe (1666): /proc/1666/oom_adj is deprecated, please use /proc/1666/oom_score_adj instead.
[ 7587.420396] iwl3945 0000:03:00.0: PCI INT A disabled
[ 7599.728554] cfg80211: Calling CRDA to update world regulatory domain
[ 7599.736628] cfg80211: World regulatory domain updated:
[ 7599.736632] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7599.736637] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736641] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736645] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7599.736649] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.736653] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7599.797314] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[ 7599.797319] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[ 7599.797397] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 7599.797419] iwl3945 0000:03:00.0: setting latency timer to 64
[ 7599.837714] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[ 7599.837719] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[ 7599.837880] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[ 7599.838124] Registered led device: phy0-led
[ 7599.838170] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain 
[ 7599.838335] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[ 7599.980440] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 7599.980656] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7599.983562] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7906.428550] iwl3945 0000:03:00.0: PCI INT A disabled
[ 7913.242835] cfg80211: Calling CRDA to update world regulatory domain
[ 7913.249969] cfg80211: World regulatory domain updated:
[ 7913.249973] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7913.249978] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7913.249982] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7913.249986] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7913.249990] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7913.249994] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7913.311805] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[ 7913.311810] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[ 7913.311885] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 7913.311907] iwl3945 0000:03:00.0: setting latency timer to 64
[ 7913.352172] iwl3945 0000:03:00.0: Tunable channels: 13 802.11bg, 23 802.11a channels
[ 7913.352177] iwl3945 0000:03:00.0: Detected Intel Wireless WiFi Link 3945ABG
[ 7913.352330] iwl3945 0000:03:00.0: irq 45 for MSI/MSI-X
[ 7913.352601] Registered led device: phy0-led
[ 7913.352642] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain 
[ 7913.352806] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[ 7913.385208] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 7913.385384] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch
[ 7913.387138] iwl3945 0000:03:00.0: Radio disabled by HW RF Kill switch

I have a Dell E6510 and after installing Ubuntu and connecting to a wireless network, my Wifi LED keeps blinking all the time, probably in response to traffic.

This is really annoying because it keeps drawing my attention away from the screen. Is there any way to turn this functionality off and just let the wifi light stay on all the time as long as it has a wifi connection?

Here is my lspci for the wifi:

Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)