Dell-laptop is not working without wireless

Dell-laptop is not working without wireless

[Dmitry Torokhov]

Matthew,

Not sure if this has already been reported, but here it goes:

dell-laptop module does not work on my Latitude d630 unless driver for
my wireless card (which happens to be iwl3945) is already loaded.
Otherwise dcsbas_smi_request() returns all zeroes which causes
dell-laptop to not create any rfkill devices nor install backlight
device:

[  766.262842] dell-laptop: dell_setup_rfkill() - 0, 0, 0, 0
[  766.263087] dell-laptop: max intensity is 0
[  780.388460] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network
Connection driver for Linux, 1.2.26kds
[  780.388464] iwl3945: Copyright(c) 2003-2009 Intel Corporation
[  780.388584] iwl3945 0000:0c:00.0: PCI INT A -> GSI 17 (level, low) ->
IRQ 17
[  780.388605] iwl3945 0000:0c:00.0: setting latency timer to 64
[  780.446318] iwl3945 0000:0c:00.0: Tunable channels: 11 802.11bg, 13
802.11a channels
[  780.446322] iwl3945 0000:0c:00.0: Detected Intel Wireless WiFi Link
3945ABG
[  780.446474] iwl3945 0000:0c:00.0: irq 29 for MSI/MSI-X
[  780.451713] phy1: Selected rate control algorithm 'iwl-3945-rs'
[  785.216846] iwl3945 0000:0c:00.0: firmware: requesting
iwlwifi-3945-2.ucode
[  785.233257] iwl3945 0000:0c:00.0: loaded firmware version 15.32.2.9
[  785.303299] Registered led device: iwl-phy1::radio
[  785.303445] Registered led device: iwl-phy1::assoc
[  785.303522] Registered led device: iwl-phy1::RX
[  785.303597] Registered led device: iwl-phy1::TX
[  799.213373] dell-laptop: dell_setup_rfkill() - 0, 1031f, 100, 1
[  799.213383] dell-laptop: setting up dell-wifi rfkill
[  799.213971] dell-laptop: setting up dell-bluetooth rfkill
[  799.214726] dell-laptop: max intensity is 7

Thanks.

-- 
Dmitry

Re: Dell-laptop is not working without wireless

[Matthew Garrett]

On Mon, Aug 17, 2009 at 10:32:27PM -0700, Dmitry Torokhov wrote:

> dell-laptop module does not work on my Latitude d630 unless driver for
> my wireless card (which happens to be iwl3945) is already loaded.
> Otherwise dcsbas_smi_request() returns all zeroes which causes
> dell-laptop to not create any rfkill devices nor install backlight
> device:

That's quite bizarre. I'd had one report of the backlight setup failing, 
but hadn't connected it with wireless driver loading. Long shot, but I 
don't suppose you can figure out which bit of the wifi config is needed 
to get dell-laptop working by just bailing at various bits of the probe 
and seeing if you get sensible answers?

-- 
Matthew Garrett | mjg59@srcf.ucam.org

Re: Dell-laptop is not working without wireless

[Dmitry Torokhov]

On Tue, Aug 18, 2009 at 01:10:49PM +0100, Matthew Garrett wrote:
> On Mon, Aug 17, 2009 at 10:32:27PM -0700, Dmitry Torokhov wrote:
> 
> > dell-laptop module does not work on my Latitude d630 unless driver for
> > my wireless card (which happens to be iwl3945) is already loaded.
> > Otherwise dcsbas_smi_request() returns all zeroes which causes
> > dell-laptop to not create any rfkill devices nor install backlight
> > device:
> 
> That's quite bizarre. I'd had one report of the backlight setup failing, 
> but hadn't connected it with wireless driver loading. Long shot, but I 
> don't suppose you can figure out which bit of the wifi config is needed 
> to get dell-laptop working by just bailing at various bits of the probe 
> and seeing if you get sensible answers?
> 

Admittedly I have not spend much time on it but it looks like my box
_really_ wants wifi interface to be fully operational before
dcsbas_smi_request() starts returning proper data. I wonder if iwl3945's
rfkill support interferes somehow here...

Maybe Mario (being a Dell guy) has an idea why this might be happening?

-- 
Dmitry

Re: Dell-laptop is not working without wireless

[Mario Limonciello]

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Hi Dmitry:

Dmitry Torokhov wrote:
> On Tue, Aug 18, 2009 at 01:10:49PM +0100, Matthew Garrett wrote:
>   
>
> Admittedly I have not spend much time on it but it looks like my box
> _really_ wants wifi interface to be fully operational before
> dcsbas_smi_request() starts returning proper data. I wonder if iwl3945's
> rfkill support interferes somehow here...
>
> Maybe Mario (being a Dell guy) has an idea why this might be happening?
>
>   
I'm on 2.6.31-rc8 or so.  I can't actually reproduce this on a d630.  I
get all of the rfkill devices populated.

$ rfkill list
0: dell-wifi: Wireless LAN
    Soft blocked: yes
    Hard blocked: yes
1: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: yes
2: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: yes
$ sudo rmmod iwl3945 iwlcore dell-laptop
$ rfkill list
$ sudo modprobe dell-laptop
$ rfkill list
3: dell-wifi: Wireless LAN
    Soft blocked: yes
    Hard blocked: yes
4: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: yes

<hit the hardware killswitch>

$ rfkill list
3: dell-wifi: Wireless LAN
    Soft blocked: yes
    Hard blocked: yes
4: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: yes
5: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
$ sudo modprobe iwl3945
$ rfkill list
3: dell-wifi: Wireless LAN
    Soft blocked: yes
    Hard blocked: yes
4: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: yes
5: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
6: phy1: Wireless LAN
    Soft blocked: no
    Hard blocked: no

There *is* a problem here that the hardware killswitch status doesn't
get updated, but Matthew is aware of that.  Make sure you're not getting
false data because of it.

-- 
Mario Limonciello
*Dell | Linux Engineering*
mario_limonciello@dell.com


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Re: Dell-laptop is not working without wireless

[Dmitry Torokhov]

On Thursday 03 September 2009 09:42:35 am Mario Limonciello wrote:
> Hi Dmitry:
> 
> Dmitry Torokhov wrote:
> > On Tue, Aug 18, 2009 at 01:10:49PM +0100, Matthew Garrett wrote:
> >   
> >
> > Admittedly I have not spend much time on it but it looks like my box
> > _really_ wants wifi interface to be fully operational before
> > dcsbas_smi_request() starts returning proper data. I wonder if iwl3945's
> > rfkill support interferes somehow here...
> >
> > Maybe Mario (being a Dell guy) has an idea why this might be happening?
> >
> >   
> I'm on 2.6.31-rc8 or so.  I can't actually reproduce this on a d630.  I
> get all of the rfkill devices populated.
> 

Hmm, what is the BIOS version in your box? Also, mine used to have
broadcom-based wifi and I replaced it with iwl3945, would that make
any difference?

Thanks!

-- 
Dmitry

Re: Dell-laptop is not working without wireless

[Mario Limonciello]

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Hi Dmitry:

Dmitry Torokhov wrote:
> On Thursday 03 September 2009 09:42:35 am Mario Limonciello wrote:
>   
>
> Hmm, what is the BIOS version in your box? Also, mine used to have
> broadcom-based wifi and I replaced it with iwl3945, would that make
> any difference?
I'm on BIOS A06, but I wouldn't /expect/ any of the stable (A**) BIOS
releases to change any behaviors like this.

What card the machine shipped with won't have a bearing on the behaviors
with the current card.  There aren't any factory processes that change
the BIOS based on the card, just processes that would add newer firmware
directly to cards that support it.
-- 
Mario Limonciello
*Dell | Linux Engineering*
mario_limonciello@dell.com


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