[iwlwifi] RF_KILL bit not showing up in dmesg

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[iwlwifi] RF_KILL bit not showing up in dmesg

Postby martin_kirch on Sun May 11, 2014 10:46 am

Hi everyone,
I'm using LMDE (kernel 3.11-2-amd64) on a Dell Latitude 6430u, which embeds an Intel Centrino Ultimate-N 6300 AGN for wireless connectivity.

I have a minor problem: the wireless toggle button does not work. WiFI works perfectly, but I have to use the desktop applet to turn it on/off and it leaves the Bluetooth always on. According to by BIOS, this button must be handled by the driver so I tried to install the Intel firmware (iwlwifi-6000-4.ucode) but it didn't fix the problem.
The button works when running a live Ubuntu on a USB key, and as I tried to understand how they do get it to work I noticed a difference when reading dmesg.

In LMDE:
Code: Select all
16:19:22 kirchgem@blackmesa:~$ dmesg | grep iwlwifi
[    9.736111] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[    9.736177] iwlwifi 0000:02:00.0: irq 46 for MSI/MSI-X
[    9.739696] iwlwifi 0000:02:00.0: firmware: agent loaded iwlwifi-6000-4.ucode into memory
[    9.740403] iwlwifi 0000:02:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm
[    9.753645] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[    9.753648] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
[    9.753650] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled
[    9.753651] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_P2P enabled
[    9.753654] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Ultimate-N 6300 AGN, REV=0x74
[    9.753720] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[   11.603675] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[   11.610724] iwlwifi 0000:02:00.0: Radio type=0x0-0x3-0x1
[   11.827270] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[   11.834216] iwlwifi 0000:02:00.0: Radio type=0x0-0x3-0x1

In Ubuntu:
Code: Select all
16:19:37 kirchgem@blackmesa:~$ grep iwlwifi dmesg_ubuntu.txt
[   11.709995] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[   11.710429] iwlwifi 0000:02:00.0: irq 45 for MSI/MSI-X
[   11.713185] iwlwifi 0000:02:00.0: Direct firmware load failed with error -2
[   11.713189] iwlwifi 0000:02:00.0: Falling back to user helper
[   11.896758] iwlwifi 0000:02:00.0: Direct firmware load failed with error -2
[   11.896762] iwlwifi 0000:02:00.0: Falling back to user helper
[   11.935364] iwlwifi 0000:02:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm
[   12.004825] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[   12.004829] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[   12.004831] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[   12.004834] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Ultimate-N 6300 AGN, REV=0x74
[   12.005160] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[   12.720567] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[   12.728125] iwlwifi 0000:02:00.0: Radio type=0x0-0x3-0x1
[   12.946556] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[   12.953505] iwlwifi 0000:02:00.0: Radio type=0x0-0x3-0x1

Among other things, in LMDE CONFIG_IWLWIFI_DEVICE_TRACING is disabled whereas it's enabled in Ubuntu.
Under Ubuntu, if I play with the wireless button the following lines appear :
Code: Select all
[  144.777737] iwlwifi 0000:02:00.0: RF_KILL bit toggled to disable radio.
[  144.815639] iwlwifi 0000:02:00.0: Not sending command - RF KILL
[  165.969797] iwlwifi 0000:02:00.0: RF_KILL bit toggled to enable radio.
[  166.773532] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[  166.780523] iwlwifi 0000:02:00.0: Radio type=0x0-0x3-0x1

That RF_KILL bit never appeared under LMDE...

So I'm wondering if CONFIG_IWLWIFI_DEVICE_TRACING is really the culprit here ? If so, do I have to recompile the module ?

Thanks for any hints,

Martin
martin_kirch
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