Re: nm in different linux distributions - ppp versus qmi-wwan

On Fri, 2015-11-06 at 17:22 +0100, Thomas Schäfer wrote:

That was the problem. option has occupied to much resources.
After removing option and qmi_wwan and adding them in reverse order 
everything works as expected.
So now I have to find the right people of manjaro.. or they read this 
thread accidentally.

This should work automatically.  What this probably means is that option
is too general in binding to this device, and we should get the 'lsusb
-v' output for the device so we can figure out how to restrict it.  Any
chance you can provide that?


Thank You very much!!


Am 06.11.2015 um 16:13 schrieb Bjørn Mork:
Thomas Schäfer <tschaefer t-online de> writes:

[  369.482170] option 1-2:1.0: GSM modem (1-port) converter detected
[  369.482562] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
[  369.482639] option 1-2:1.1: GSM modem (1-port) converter detected
[  369.483008] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
[  369.483082] option 1-2:1.2: GSM modem (1-port) converter detected
[  369.486206] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB2
[  369.507370] option 1-2:1.3: GSM modem (1-port) converter detected
[  369.507707] option 1-2:1.4: GSM modem (1-port) converter detected
[  369.508139] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB4

Were 4 serial devices expected?  What does the device config look like
(lsusb -v ...)?

Maybe the option driver is configured to bind to any interface on this
modem, "stealing" the QMI interface before qmi_wwan gets the chance?
Difficult to know based on the available info....

You could try to manually unload the drivers and then reload them in the
opposite order to see what happens.

  rmmod option
  rmmod qmi_wwan
  modprobe qmi_wwan
  modprobe option

If the distro (or some relates script) use the dynamic ID feature, then

  cat /sys/bus/usb-serial/drivers/option1/new_id

would be enlightening. You could also try to manually verify a match
against the putput of

  modinfo -F alias option
  modinfo -F alias qmi_wwan

but that will be challenging due to the mix of vendor id and class
matching (Huawei devices use subclass + protocol matches).


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