Problem with mm-1.0.0 and Dell 5560

[Marek Kaluba]

Sorry for a little delay.

I did not understand what You asked me to check, so I attach both versions:
cats of /sys/kernel/debug/usb/devices.
The normal one (after doing both of rmmods) and one (with -option suffix)
after clean restart with

options cdc_ncm prefer_mbim=N

in /etc/modprobe.d/ncm.conf



On 23 December 2013 08:17, Bjørn Mork <bjorn at mork.no> wrote:

> Marek Kaluba <abulak at gmail.com> writes:
>
> > # rmmod cdc_mbim
> > # rmmod cdc_ncm
> > # modprobe cdc_ncm prefer_mbim=N
> > # mmcli -L
> >
> > Found 1 modems:
> >         /org/freedesktop/ModemManager1/Modem/0 [Dell] DW5560
> >
> > # mmcli -m 0
> >
> > /org/freedesktop/ModemManager1/Modem/0 (device id
> 'f1f831063dbe34d741e5ea2723b18b70786ebd95')
> >   -------------------------
> >   Hardware |   manufacturer: 'Dell'
> >            |          model: 'DW5560'
> >            |       revision: 'R3C11'
> >            |      supported: 'gsm-umts'
> >            |        current: 'gsm-umts'
> >            |   equipment id: '358994041358732'
> >   -------------------------
> >   System   |         device:
> '/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6'
> >            |        drivers: 'cdc_acm, cdc_mbim, cdc_wdm'
>
>
> So the device is still bound to the cdc_mbim driver, meaning that the
> modprobe cdc_ncm prefer_mbim=N had no effect and further testing of MM
> without MBIM support is pointless.
>
> I don't know why that didn't work.  Maybe we fail to reset the control
> interface altsetting to 0?  I have assumed that the USB core did that
> for us, but I must admit I never really verified it...
>
> Could you dump the /sys/kernel/debug/usb/devices file after doing just
>
>  # rmmod cdc_mbim
>  # rmmod cdc_ncm
>
> as well? If it shows altsetting #1 still active for if #6 then that
> assumption is likely the problem here.
>
> If not, then please verify that
>
>   grep . /sys/module/cdc_ncm/parameters/prefer_mbim
>
> shows 'N' and then "unplug" the modem and replug it if you can.  I
> realize that this is an internal module, but there is usually a RF
> switch you can use to do this.  Or you can use rfkill if there is a
> driver supporting your laptop.
>
> An alternative if you cannot "unplug" the modem would be creating a
> /etc/modprobe.d/ncm.conf file with
>
>   options cdc_ncm prefer_mbim=N
>
> and reboot.
>
> > I:  If#= 6 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0d Prot=00 Driver=cdc_mbim
> > E:  Ad=86(I) Atr=03(Int.) MxPS=  32 Ivl=8ms
> > I:* If#= 6 Alt= 1 #EPs= 1 Cls=02(comm.) Sub=0e Prot=00 Driver=cdc_mbim
> > E:  Ad=86(I) Atr=03(Int.) MxPS=  32 Ivl=8ms
>
> Thanks.  This shows that you do have both the NCM and MBIM alternatives
> as expected, but that the MBIM altsetting is the active one.  Which it
> wasn't supposed to be.
>
>
> Bjørn
>
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