I've got the same problem with iwl4965:
kern.log:
Wireless -----> OFF
Apr 21 14:42:52 doris kernel: [ 3333.128890] ACPI: PCI interrupt for device
0000:06:00.0 disabled
Apr 21 14:42:52 doris kernel: [ 3333.151940] ACPI: PCI Interrupt
0000:06:00.0[A] -> GSI 17 (level, low) -> IRQ 17
Apr 21 14:42:52 doris kernel: [ 3333.152039] PM: Writing back config space on
device 0000:06:00.0 at offset 1 (was 100002, writing 100006)
Apr 21 14:42:52 doris kernel: [ 3333.155181] iwl4965: Radio disabled by HW RF
Kill switch
Apr 21 14:42:52 doris kernel: [ 3333.155272] ACPI: PCI interrupt for device
0000:06:00.0 disabled
Wireless -----> ON
Apr 21 14:43:21 doris kernel: [ 3340.707235] usb 5-1: new full speed USB device
using uhci_hcd and address 3
Apr 21 14:43:21 doris kernel: [ 3340.753428] usb 5-1: configuration #1 chosen
from 1 choice
Apr 21 14:43:21 doris kernel: [ 3340.857370] Bluetooth: HCI USB driver ver 2.9
Apr 21 14:43:21 doris kernel: [ 3340.860066] usbcore: registered new interface
driver hci_usb
(stops here)
:~$ sudo rmmod iwl4965; sudo modprobe iwl4965
Apr 21 14:43:57 doris kernel: [ 3349.009748] iwl4965: Intel(R) Wireless WiFi
Link 4965AGN driver for Linux, 1.2.25
Apr 21 14:43:57 doris kernel: [ 3349.009753] iwl4965: Copyright(c) 2003-2007
Intel Corporation
Apr 21 14:43:57 doris kernel: [ 3349.009857] ACPI: PCI Interrupt
0000:06:00.0[A] -> GSI 17 (level, low) -> IRQ 17
Apr 21 14:43:57 doris kernel: [ 3349.009869] PCI: Setting latency timer of
device 0000:06:00.0 to 64
Apr 21 14:43:57 doris kernel: [ 3349.010648] iwl4965: Detected Intel Wireless
WiFi Link 4965AGN
Apr 21 14:43:57 doris kernel: [ 3349.050680] wmaster0: Selected rate control
algorithm 'iwl-4965-rs'
Apr 21 14:43:57 doris kernel: [ 3349.066323] ACPI: PCI Interrupt
0000:06:00.0[A] -> GSI 17 (level, low) -> IRQ 17
Apr 21 14:43:57 doris kernel: [ 3349.206484] iwl4965: Tunable channels: 11
802.11bg, 13 802.11a channels
** Summary changed:
- iwl3945: Wireless can't be activated after disabling kill switch
+ iwl3945 | iwl4965: Wireless can't be activated after disabling kill switch
** Description changed:
Normally, the wifi kill switch of my Dell D620 is enabled because I
don't need wifi often. If the system was booted with an enabled kill
switch, then I can't reactive the wireless interface any more. Only a
reboot with deactivated kill switch enables the interface again.
description: Wireless interface
product: PRO/Wireless 3945ABG Network Connection
vendor: Intel Corporation
driver = iwl3945
This problem didn't occur on gutsy (which the closed source driver).
+
+ iwl4965 suffers from the same defect.
--
iwl3945 | iwl4965: Wireless can't be activated after disabling kill switch
https://bugs.launchpad.net/bugs/193970
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