Dell 5570 (Sierra) supported?

Manuel Lauss manuel.lauss at
Mon Dec 1 09:31:34 PST 2014

On Wed, Nov 26, 2014 at 9:41 AM, Bjørn Mork <bjorn at> wrote:
> Dan Williams <dcbw at> writes:
>> On Tue, 2014-11-25 at 20:03 +0100, Manuel Lauss wrote:
>>> > On Tue, 2014-11-25 at 19:54 +0100, Manuel Lauss wrote:
>>> >
>>> >>            |    power state: 'low'
> Ouch.  Now I remembered where I last heard about this modem...
> And it most likely does not have anything to do with the modem at all.
> It is some Dell laptop rfkill feature we just don't know how to
> enable/use.
>>> Well, rfkill list shows only bluetooth and wlan (and nfc card reader).
>>> wwan is enabled in BIOS; the dell airplane mode switch acpi device node
>>> doesn't do anything (tried to poke all methods with acpi_call).
>> One more thing to double-check: is the SIM slot under the battery, and
>> if so is the battery inserted and correctly seated?  My laptop (an HP,
>> not a dell) has some kind of BIOS interlock so that when the battery is
>> removed (or poorly secured) it will rfkill the WWAN card automatically
>> to prevent SIM hotswapping.
> Smart :-)  Yes, that sounds like something to verify.
> But the fact that there is no wwan switch in the "rfkill list" output is
> really a strong indication that we lack support for the wwan switch in
> the dell laptop driver (for this laptop variant - it obviously works for
> older Dell laptops).

I got it semi-working (after disabling airplane mode in windows) in that
I can now enable the modem, but it just stays in "looking for network"
mode forever, so rfkill is not entirely disabled.

Thanks for your help!

More information about the libmbim-devel mailing list