Getting frequency band in use
Marius Kotsbak
marius at kotsbak.com
Mon May 5 14:56:36 PDT 2014
2014-05-05 23:29 GMT+02:00 Dan Williams <dcbw at redhat.com>:
> On Mon, 2014-05-05 at 22:49 +0200, Marius Kotsbak wrote:
> > 2014-04-29 11:41 GMT+02:00 Aleksander Morgado <aleksander at aleksander.es
> >:
> >
> > > On Tue, Apr 29, 2014 at 11:13 AM, Marius Kotsbak <marius at kotsbak.com>
> > > wrote:
> > > > Is there a way to use QMI to get the current frequency band in use,
> > > either
> > > > using the current libqmi or some yet unimplemented API? Or possibly
> using
> > > > MBIM?
> > > >
> > > > It would be interesting to see when the newly opened 800 MHz band for
> > > LTE is
> > > > in use.
> > >
> > >
> > > QMI has "NAS Get RF Band Information", but there is no qmicli command
> > > for that one yet. There is also the "NAS Get System Selection
> > > Preference", which will tell you how the modem is configured (i.e.
> > > which frequency bands it's allowed to use), and that one has the
> > > qmicli --nas-get-system-selection-preference command already. You can
> > > update which frequency bands to use through "NAS Set System Selection
> > > Preference", but the qmicli counterpart doesn't play with frequency
> > > bands at all, only with access techs (e.g. lte, gsm, umts..).
> > >
> > > ModemManager uses "NAS Get System Selection Preference" to list the
> > > current bands (e.g. with mmcli -m 0); and I also implemented support
> > > for "NAS Get RF Band Information" in there, but only when compiled
> > > with --with-newest-qmi-commands. You can update the bands allowed to
> > > use (will use "NAS Set System Selection Preference" ) with mmcli
> > > --set-current-bands.
> > >
> >
> > I tried building MM 1.2 with that option, but it (Sierra MC7710) then
> fails
> > to connect. Relevant parts of the syslog:
> >
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: <info> Modem
> for
> > device at '/sys/devices/pci0000:00/0000:00:14.0/usb3/3-10' successfully
> > created
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Checking version info (10 retries)...
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > QMI Device supports 17 services:
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] ctl (1.5)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] wds (1.12)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] dms (1.7)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] nas (1.21)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] qos (1.3)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] wms (1.4)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] pds (1.10)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] auth (1.1)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] at (1.1)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] voice (2.1)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] cat2 (2.0)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] uim (1.4)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] pbm (1.4)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] sar (1.0)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] wda (1.0)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] cat (2.0)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]:
> > [/dev/cdc-wdm0] rms (1.0)
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Setting network port data format...
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Network port data format operation finished
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Allocating new client ID...
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Registered 'dms' (version 1.7) client with ID '4'
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Allocating new client ID...
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Registered 'nas' (version 1.21) client with ID '4'
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Allocating new client ID...
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Registered 'wms' (version 1.4) client with ID '4'
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Allocating new client ID...
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: [/dev/cdc-wdm0]
> > Registered 'pds' (version 1.10) client with ID '4'
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: <warn>
> > (ttyUSB2): port attributes not fully set
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: <warn>
> couldn't
> > load list of Own Numbers: 'Couldn't get MSISDN: QMI protocol error (16):
> > 'NotProvisioned''
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: <warn>
> couldn't
> > load current Bands: 'Couldn't parse the list of current bands'
> > May 5 21:27:41 marius-Precision-M4800 ModemManager[999]: <info> Modem:
> > state changed (unknown -> disabled)
> > May 5 21:27:41 marius-Precision-M4800 NetworkManager[1078]: <warn>
> > (cdc-wdm0): failed to look up interface index
> > May 5 21:27:41 marius-Precision-M4800 NetworkManager[1078]: <info>
> > (cdc-wdm0): new Broadband device (driver: 'qcserial, qmi_wwan' ifindex:
> 0)
> > May 5 21:27:41 marius-Precision-M4800 NetworkManager[1078]: <info>
> > (cdc-wdm0): exported as /org/freedesktop/NetworkManager/Devices/3
> > May 5 21:27:41 marius-Precision-M4800 NetworkManager[1078]: <info>
> > (cdc-wdm0): device state change: unmanaged -> unavailable (reason
> > 'managed') [10 20 2]
> > May 5 21:27:41 marius-Precision-M4800 NetworkManager[1078]: <info>
> > (cdc-wdm0): deactivating device (reason 'managed') [2]
> > May 5 21:27:41 marius-Precision-M4800 NetworkManager[1078]: <info>
> > (cdc-wdm0): device state change: unavailable -> disconnected (reason
> > 'none') [20 30 0]
> >
> > May 5 21:39:40 marius-Precision-M4800 NetworkManager[1078]: <info>
> > Activation (cdc-wdm0) starting connection 'Telenor Default'
> > May 5 21:39:40 marius-Precision-M4800 NetworkManager[1078]: <info>
> > (cdc-wdm0): device state change: disconnected -> prepare (reason 'none')
> > [30 40 0]
>
> Can you get the ModemManager debug logs from this point forward? That's
> what would be interesting here, since the time between the connection
> request (21:39:40) and the "network timeout" (21:39:41) is only one
> second, which is pretty odd. Lets see what MM is doing once it gets the
> Simple Connect request.
>
>
Hmm, when trying to do that, it then worked to connect... :/ Anyway, I then
get this using mmcli:
Bands | supported: 'cdma-bc15-aws, dcs, egsm, pcs, u2100, u900,
eutran-i, eutran-iii, eutran-vii, eutran-viii, eutran-xx'
| current: 'cdma-bc15-aws, dcs, egsm, pcs, u2100, u900,
eutran-i, eutran-iii, eutran-vii, eutran-viii, eutran-xx'
Isn't that just listing all enabled bands, not what is currently in use?
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