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[Pali <pali.rohar@xxxxxxxxx>]

Public bug reported:

NetworkManager ignoring cdc_ether interface usb0. In syslog is only this
outout:

Dec 25 09:51:29 Pali-EliteBook mtp-probe: checking bus 2, device 11: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1"
Dec 25 09:51:29 Pali-EliteBook kernel: [ 1801.528548] cdc_acm 2-1.1:1.6: This device cannot do calls on its own. It is not a modem.
Dec 25 09:51:29 Pali-EliteBook kernel: [ 1801.528784] cdc_acm 2-1.1:1.6: ttyACM0: USB ACM device
Dec 25 09:51:29 Pali-EliteBook mtp-probe: bus: 2, device: 11 was not an MTP device
Dec 25 09:51:29 Pali-EliteBook kernel: [ 1801.531506] cdc_ether 2-1.1:1.8: usb0: register 'cdc_ether' at usb-0000:00:1d.0-1.1, CDC Ethernet Device, 76:61:7d:56:ed:da
Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.8/net/usb0, iface: usb0)
Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.8/net/usb0, iface: usb0): no ifupdown configuration found.
Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/net/usbpn0, iface: usbpn0)
Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/net/usbpn0, iface: usbpn0): no ifupdown configuration found

And NetworkManager totally ignored it.

On other side of usb cable is Linux device Nokia N900, where is runninf dhcp server, so NetworkManager should working fine with usb0 too. But output of
$ nmcli dev
does not contains any usb0 interface.

When I call manually:
$ sudo dhclient usb0
network connection is established and ip address assigned correctly (from dhcp server).

So why NM ignoring this interface? It is same as other eth0....


In NM code in file src/nm-udev-manager.c line 507-517 is this:

 /* Ignore Nokia cdc-ether interfaces in PC-Suite mode since we need to
	 * talk phonet to use them, which ModemManager doesn't do yet.
	 */
	tmp = g_udev_device_get_property (device, "ID_VENDOR_ID");
	if (g_strcmp0 (tmp, "0421") == 0) { /* Nokia vendor ID */
		tmp = g_udev_device_get_property (device, "ID_MODEL");
		if (tmp && (strstr (tmp, "PC-Suite") || strstr (tmp, "PC Suite"))) {
			nm_log_dbg (LOGD_HW, "ignoring Nokia PC-Suite ethernet interface");
			return;
		}
	}

I think that this section ignoring my usb0 interface (is has really name
PC-Suite). Why is here this stupid checking? It should be commented,
because I (and other people too) cannot use phone as cdc_ether device...

Output from lsusb:
Bus 002 Device 011: ID 0421:01c8 Nokia Mobile Phones N900 (PC-Suite Mode)

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/908522

Title:
  NetworkManager ignoring cdc_ether interface usb0

Status in “network-manager” package in Ubuntu:
  New

Bug description:
  NetworkManager ignoring cdc_ether interface usb0. In syslog is only
  this outout:

  Dec 25 09:51:29 Pali-EliteBook mtp-probe: checking bus 2, device 11: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1"
  Dec 25 09:51:29 Pali-EliteBook kernel: [ 1801.528548] cdc_acm 2-1.1:1.6: This device cannot do calls on its own. It is not a modem.
  Dec 25 09:51:29 Pali-EliteBook kernel: [ 1801.528784] cdc_acm 2-1.1:1.6: ttyACM0: USB ACM device
  Dec 25 09:51:29 Pali-EliteBook mtp-probe: bus: 2, device: 11 was not an MTP device
  Dec 25 09:51:29 Pali-EliteBook kernel: [ 1801.531506] cdc_ether 2-1.1:1.8: usb0: register 'cdc_ether' at usb-0000:00:1d.0-1.1, CDC Ethernet Device, 76:61:7d:56:ed:da
  Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.8/net/usb0, iface: usb0)
  Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.8/net/usb0, iface: usb0): no ifupdown configuration found.
  Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/net/usbpn0, iface: usbpn0)
  Dec 25 09:51:29 Pali-EliteBook NetworkManager[4360]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/net/usbpn0, iface: usbpn0): no ifupdown configuration found

  And NetworkManager totally ignored it.

  On other side of usb cable is Linux device Nokia N900, where is runninf dhcp server, so NetworkManager should working fine with usb0 too. But output of
  $ nmcli dev
  does not contains any usb0 interface.

  When I call manually:
  $ sudo dhclient usb0
  network connection is established and ip address assigned correctly (from dhcp server).

  So why NM ignoring this interface? It is same as other eth0....

  
  In NM code in file src/nm-udev-manager.c line 507-517 is this:

   /* Ignore Nokia cdc-ether interfaces in PC-Suite mode since we need to
  	 * talk phonet to use them, which ModemManager doesn't do yet.
  	 */
  	tmp = g_udev_device_get_property (device, "ID_VENDOR_ID");
  	if (g_strcmp0 (tmp, "0421") == 0) { /* Nokia vendor ID */
  		tmp = g_udev_device_get_property (device, "ID_MODEL");
  		if (tmp && (strstr (tmp, "PC-Suite") || strstr (tmp, "PC Suite"))) {
  			nm_log_dbg (LOGD_HW, "ignoring Nokia PC-Suite ethernet interface");
  			return;
  		}
  	}

  I think that this section ignoring my usb0 interface (is has really
  name PC-Suite). Why is here this stupid checking? It should be
  commented, because I (and other people too) cannot use phone as
  cdc_ether device...

  Output from lsusb:
  Bus 002 Device 011: ID 0421:01c8 Nokia Mobile Phones N900 (PC-Suite Mode)

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