Same issue with a Motorola A910 phone. Here is syslog with debug
priority:

Jun 15 15:37:55 chimera kernel: [118371.440119] usb 3-1: new full speed USB 
device using uhci_hcd and address 3
Jun 15 15:37:55 chimera udevd[7639]: seq 1923 queued, 'add' 'usb' 
Jun 15 15:37:55 chimera udevd-event[21354]: device 0x7fc3532683e0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21354]: device 0x7fc353267ce0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3' 
Jun 15 15:37:55 chimera udevd-event[21354]: device 0x7fc353268590 has devpath 
'/devices/pci0000:00/0000:00:1a.0' 
Jun 15 15:37:55 chimera udevd-event[21354]: device 0x7fc353268990 has devpath 
'/devices/pci0000:00' 
Jun 15 15:37:55 chimera udevd-event[21354]: LINK 'char/189:258' 
/lib/udev/rules.d/50-udev-default.rules:5 
Jun 15 15:37:55 chimera udevd-event[21354]: MODE 0664 
/lib/udev/rules.d/50-udev-default.rules:53 
Jun 15 15:37:55 chimera udevd-event[21354]: NAME 'bus/usb/003/003' 
/lib/udev/rules.d/50-udev-default.rules:53 
Jun 15 15:37:55 chimera udevd-event[21354]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21354]: create db link (bus/usb/003/003 
char/189:258) 
Jun 15 15:37:55 chimera udevd-event[21354]: creating device node 
'/dev/bus/usb/003/003', devnum=189:258, mode=0664, uid=0, gid=0 
Jun 15 15:37:55 chimera udevd-event[21354]: mknod(/dev/bus/usb/003/003, 020664, 
(189,258)) 
Jun 15 15:37:55 chimera udevd-event[21354]: chmod(/dev/bus/usb/003/003, 020664) 
Jun 15 15:37:55 chimera udevd-event[21354]: chown(/dev/bus/usb/003/003, 0, 0) 
Jun 15 15:37:55 chimera udevd-event[21354]: '/dev/char/189:258' with target 
'/dev/bus/usb/003/003' has the highest priority 0, create it 
Jun 15 15:37:55 chimera udevd-event[21354]: creating symlink 
'/dev/char/189:258' to '../bus/usb/003/003' 
Jun 15 15:37:55 chimera udevd-event[21354]: passed 321 bytes to monitor 
0x7fc3532683e0 
Jun 15 15:37:55 chimera udevd-event[21354]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21354]: seq 1923 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1923 forked, pid [21354], 'add' 'usb', 
0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1923 cleanup, pid [21354], status 0, 0 
seconds old 
Jun 15 15:37:55 chimera kernel: [118371.624561] usb 3-1: configuration #1 
chosen from 1 choice
Jun 15 15:37:55 chimera kernel: [118371.630972] cdc_acm 3-1:1.0: ttyACM0: USB 
ACM device
Jun 15 15:37:55 chimera udevd[7639]: seq 1924 queued, 'add' 'usb' 
Jun 15 15:37:55 chimera udevd-event[21355]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21355]: passed 313 bytes to monitor 
0x7fc353268f40 
Jun 15 15:37:55 chimera udevd-event[21355]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21355]: seq 1924 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1924 forked, pid [21355], 'add' 'usb', 
0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1924 cleanup, pid [21355], status 0, 0 
seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1925 queued, 'add' 'tty' 
Jun 15 15:37:55 chimera udevd-event[21356]: device 0x7fc353268f20 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0/tty/ttyACM0' 
Jun 15 15:37:55 chimera udevd-event[21356]: device 0x7fc353267ce0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0' 
Jun 15 15:37:55 chimera udevd-event[21356]: device 0x7fc353268990 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21356]: device 0x7fc353268310 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3' 
Jun 15 15:37:55 chimera udevd-event[21356]: device 0x7fc353268570 has devpath 
'/devices/pci0000:00/0000:00:1a.0' 
Jun 15 15:37:55 chimera udevd-event[21356]: device 0x7fc35325b050 has devpath 
'/devices/pci0000:00' 
Jun 15 15:37:55 chimera udevd-event[21356]: LINK 'char/166:0' 
/lib/udev/rules.d/50-udev-default.rules:5 
Jun 15 15:37:55 chimera udevd-event[21356]: GROUP 20 
/lib/udev/rules.d/50-udev-default.rules:16 
Jun 15 15:37:55 chimera udevd-event[21356]: IMPORT 'path_id' 
/lib/udev/rules.d/60-persistent-serial.rules:9 
Jun 15 15:37:55 chimera udevd-event[21356]: 'path_id' 
Jun 15 15:37:55 chimera udevd[7639]: seq 1925 forked, pid [21356], 'add' 'tty', 
0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1926 queued, 'add' 'usb_endpoint' 
Jun 15 15:37:55 chimera udevd-event[21359]: device 0x7fc353267db0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0/usb_endpoint/usbdev3.3_ep83' 
Jun 15 15:37:55 chimera udevd-event[21359]: device 0x7fc353268b30 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0' 
Jun 15 15:37:55 chimera udevd-event[21359]: device 0x7fc353268470 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21359]: device 0x7fc35325b000 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3' 
Jun 15 15:37:55 chimera udevd-event[21359]: device 0x7fc35325b2e0 has devpath 
'/devices/pci0000:00/0000:00:1a.0' 
Jun 15 15:37:55 chimera udevd-event[21359]: device 0x7fc35325b590 has devpath 
'/devices/pci0000:00' 
Jun 15 15:37:55 chimera udevd-event[21359]: LINK 'char/252:26' 
/lib/udev/rules.d/50-udev-default.rules:5 
Jun 15 15:37:55 chimera udevd-event[21359]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21359]: no node name set, will use kernel 
name 'usbdev3.3_ep83' 
Jun 15 15:37:55 chimera udevd-event[21359]: create db link (usbdev3.3_ep83 
char/252:26) 
Jun 15 15:37:55 chimera udevd-event[21359]: creating device node 
'/dev/usbdev3.3_ep83', devnum=252:26, mode=0660, uid=0, gid=0 
Jun 15 15:37:55 chimera udevd-event[21359]: mknod(/dev/usbdev3.3_ep83, 020660, 
(252,26)) 
Jun 15 15:37:55 chimera udevd-event[21359]: chmod(/dev/usbdev3.3_ep83, 020660) 
Jun 15 15:37:55 chimera udevd-event[21359]: chown(/dev/usbdev3.3_ep83, 0, 0) 
Jun 15 15:37:55 chimera udevd-event[21359]: '/dev/char/252:26' with target 
'/dev/usbdev3.3_ep83' has the highest priority 0, create it 
Jun 15 15:37:55 chimera udevd-event[21359]: creating symlink '/dev/char/252:26' 
to '../usbdev3.3_ep83' 
Jun 15 15:37:55 chimera udevd-event[21359]: passed 298 bytes to monitor 
0x7fc353267db0 
Jun 15 15:37:55 chimera udevd-event[21359]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21359]: seq 1926 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1926 forked, pid [21359], 'add' 
'usb_endpoint', 0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1926 cleanup, pid [21359], status 0, 0 
seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1927 queued, 'add' 'usb' 
Jun 15 15:37:55 chimera udevd-event[21361]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21361]: passed 329 bytes to monitor 
0x7fc353268bc0 
Jun 15 15:37:55 chimera udevd-event[21361]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21361]: seq 1927 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1927 forked, pid [21361], 'add' 'usb', 
0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1927 cleanup, pid [21361], status 0, 0 
seconds old 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/path_id' (stdout) 
'ID_PATH=pci-0000:00:1a.0-usb-0:1:1.0' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/path_id' returned with 
status 0 
Jun 15 15:37:55 chimera udevd-event[21356]: LINK 
'serial/by-path/pci-0000:00:1a.0-usb-0:1:1.0' 
/lib/udev/rules.d/60-persistent-serial.rules:10 
Jun 15 15:37:55 chimera udevd-event[21356]: IMPORT 'usb_id --export 
/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0/tty/ttyACM0' 
/lib/udev/rules.d/60-persistent-serial.rules:13 
Jun 15 15:37:55 chimera udevd-event[21356]: 'usb_id --export 
/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0/tty/ttyACM0' 
Jun 15 15:37:55 chimera usb_id[21364]: custom logging function 0x7f817f48c010 
registered 
Jun 15 15:37:55 chimera usb_id[21364]: device 0x7f817f48c160 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0/tty/ttyACM0' 
Jun 15 15:37:55 chimera usb_id[21364]: device 0x7f817f48c4a0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0' 
Jun 15 15:37:55 chimera usb_id[21364]: 
/sys/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0: if_class 2 protocol 0 
Jun 15 15:37:55 chimera usb_id[21364]: device 0x7f817f48cec0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_VENDOR=Motorola' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_VENDOR_ENC=Motorola' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_VENDOR_ID=22b8' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_MODEL=Motorola_USB_Modem' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_MODEL_ENC=Motorola\x20USB\x20Modem' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_MODEL_ID=3802' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_REVISION=0000' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_SERIAL=Motorola_Motorola_USB_Modem' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_TYPE=generic' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_BUS=usb' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_USB_INTERFACE_NUM=00' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stdout) 
'ID_USB_DRIVER=cdc_acm' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' (stderr) 'error 
opening USB device 'descriptors' file' 
Jun 15 15:37:55 chimera udevd-event[21356]: '/lib/udev/usb_id' returned with 
status 0 
Jun 15 15:37:55 chimera udevd-event[21356]: LINK 
'serial/by-id/usb-Motorola_Motorola_USB_Modem-if00' 
/lib/udev/rules.d/60-persistent-serial.rules:17 
Jun 15 15:37:55 chimera udevd-event[21356]: mknod(/dev/.tmp-char-166:0, 020600, 
(166,0)) 
Jun 15 15:37:55 chimera udevd-event[21356]: chmod(/dev/.tmp-char-166:0, 020600) 
Jun 15 15:37:55 chimera udevd-event[21356]: chown(/dev/.tmp-char-166:0, 0, 0) 
Jun 15 15:37:55 chimera udevd-event[21356]: IMPORT 'nm-modem-probe --vid 0x22b8 
--pid 0x3802 --usb-interface 00 --driver cdc_acm --delay 3000 --export 
/dev/.tmp-char-166:0' /lib/udev/rules.d/77-nm-probe-modem-capabilities.rules:20 
Jun 15 15:37:55 chimera udevd-event[21356]: 'nm-modem-probe --vid 0x22b8 --pid 
0x3802 --usb-interface 00 --driver cdc_acm --delay 3000 --export 
/dev/.tmp-char-166:0' 
Jun 15 15:37:55 chimera udevd[7639]: seq 1928 queued, 'add' 'usb_endpoint' 
Jun 15 15:37:55 chimera udevd-event[21366]: device 0x7fc353268310 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.1/usb_endpoint/usbdev3.3_ep01' 
Jun 15 15:37:55 chimera udevd-event[21366]: device 0x7fc3532684c0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.1' 
Jun 15 15:37:55 chimera udevd-event[21366]: device 0x7fc35325b000 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21366]: device 0x7fc35325b270 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3' 
Jun 15 15:37:55 chimera udevd-event[21366]: device 0x7fc35325b4d0 has devpath 
'/devices/pci0000:00/0000:00:1a.0' 
Jun 15 15:37:55 chimera udevd-event[21366]: device 0x7fc35325b720 has devpath 
'/devices/pci0000:00' 
Jun 15 15:37:55 chimera udevd-event[21366]: LINK 'char/252:27' 
/lib/udev/rules.d/50-udev-default.rules:5 
Jun 15 15:37:55 chimera udevd-event[21366]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21366]: no node name set, will use kernel 
name 'usbdev3.3_ep01' 
Jun 15 15:37:55 chimera udevd-event[21366]: create db link (usbdev3.3_ep01 
char/252:27) 
Jun 15 15:37:55 chimera udevd-event[21366]: creating device node 
'/dev/usbdev3.3_ep01', devnum=252:27, mode=0660, uid=0, gid=0 
Jun 15 15:37:55 chimera udevd-event[21366]: mknod(/dev/usbdev3.3_ep01, 020660, 
(252,27)) 
Jun 15 15:37:55 chimera udevd-event[21366]: chmod(/dev/usbdev3.3_ep01, 020660) 
Jun 15 15:37:55 chimera udevd-event[21366]: chown(/dev/usbdev3.3_ep01, 0, 0) 
Jun 15 15:37:55 chimera udevd-event[21366]: '/dev/char/252:27' with target 
'/dev/usbdev3.3_ep01' has the highest priority 0, create it 
Jun 15 15:37:55 chimera udevd-event[21366]: creating symlink '/dev/char/252:27' 
to '../usbdev3.3_ep01' 
Jun 15 15:37:55 chimera udevd-event[21366]: passed 298 bytes to monitor 
0x7fc353268310 
Jun 15 15:37:55 chimera udevd-event[21366]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21366]: seq 1928 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1928 forked, pid [21366], 'add' 
'usb_endpoint', 0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1928 cleanup, pid [21366], status 0, 0 
seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1929 queued, 'add' 'usb_endpoint' 
Jun 15 15:37:55 chimera udevd-event[21367]: device 0x7fc353268af0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.1/usb_endpoint/usbdev3.3_ep82' 
Jun 15 15:37:55 chimera udevd-event[21367]: device 0x7fc353268310 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.1' 
Jun 15 15:37:55 chimera udevd-event[21367]: device 0x7fc353268540 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21367]: device 0x7fc35325b000 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3' 
Jun 15 15:37:55 chimera udevd-event[21367]: device 0x7fc35325b2e0 has devpath 
'/devices/pci0000:00/0000:00:1a.0' 
Jun 15 15:37:55 chimera udevd-event[21367]: device 0x7fc35325b590 has devpath 
'/devices/pci0000:00' 
Jun 15 15:37:55 chimera udevd-event[21367]: LINK 'char/252:28' 
/lib/udev/rules.d/50-udev-default.rules:5 
Jun 15 15:37:55 chimera udevd-event[21367]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21367]: no node name set, will use kernel 
name 'usbdev3.3_ep82' 
Jun 15 15:37:55 chimera udevd-event[21367]: create db link (usbdev3.3_ep82 
char/252:28) 
Jun 15 15:37:55 chimera udevd-event[21367]: creating device node 
'/dev/usbdev3.3_ep82', devnum=252:28, mode=0660, uid=0, gid=0 
Jun 15 15:37:55 chimera udevd-event[21367]: mknod(/dev/usbdev3.3_ep82, 020660, 
(252,28)) 
Jun 15 15:37:55 chimera udevd-event[21367]: chmod(/dev/usbdev3.3_ep82, 020660) 
Jun 15 15:37:55 chimera udevd-event[21367]: chown(/dev/usbdev3.3_ep82, 0, 0) 
Jun 15 15:37:55 chimera udevd-event[21367]: '/dev/char/252:28' with target 
'/dev/usbdev3.3_ep82' has the highest priority 0, create it 
Jun 15 15:37:55 chimera udevd-event[21367]: creating symlink '/dev/char/252:28' 
to '../usbdev3.3_ep82' 
Jun 15 15:37:55 chimera udevd-event[21367]: passed 298 bytes to monitor 
0x7fc353268af0 
Jun 15 15:37:55 chimera udevd-event[21367]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21367]: seq 1929 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1929 forked, pid [21367], 'add' 
'usb_endpoint', 0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1929 cleanup, pid [21367], status 0, 0 
seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1930 queued, 'add' 'usb_endpoint' 
Jun 15 15:37:55 chimera udevd-event[21368]: device 0x7fc353268af0 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/usb_endpoint/usbdev3.3_ep00' 
Jun 15 15:37:55 chimera udevd-event[21368]: device 0x7fc353268310 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1' 
Jun 15 15:37:55 chimera udevd-event[21368]: device 0x7fc353268560 has devpath 
'/devices/pci0000:00/0000:00:1a.0/usb3' 
Jun 15 15:37:55 chimera udevd-event[21368]: device 0x7fc35325b050 has devpath 
'/devices/pci0000:00/0000:00:1a.0' 
Jun 15 15:37:55 chimera udevd-event[21368]: device 0x7fc35325b2a0 has devpath 
'/devices/pci0000:00' 
Jun 15 15:37:55 chimera udevd-event[21368]: LINK 'char/252:29' 
/lib/udev/rules.d/50-udev-default.rules:5 
Jun 15 15:37:55 chimera udevd-event[21368]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:37:55 chimera udevd-event[21368]: no node name set, will use kernel 
name 'usbdev3.3_ep00' 
Jun 15 15:37:55 chimera udevd-event[21368]: create db link (usbdev3.3_ep00 
char/252:29) 
Jun 15 15:37:55 chimera udevd-event[21368]: creating device node 
'/dev/usbdev3.3_ep00', devnum=252:29, mode=0660, uid=0, gid=0 
Jun 15 15:37:55 chimera udevd-event[21368]: mknod(/dev/usbdev3.3_ep00, 020660, 
(252,29)) 
Jun 15 15:37:55 chimera udevd-event[21368]: chmod(/dev/usbdev3.3_ep00, 020660) 
Jun 15 15:37:55 chimera udevd-event[21368]: chown(/dev/usbdev3.3_ep00, 0, 0) 
Jun 15 15:37:55 chimera udevd-event[21368]: '/dev/char/252:29' with target 
'/dev/usbdev3.3_ep00' has the highest priority 0, create it 
Jun 15 15:37:55 chimera udevd-event[21368]: creating symlink '/dev/char/252:29' 
to '../usbdev3.3_ep00' 
Jun 15 15:37:55 chimera udevd-event[21368]: passed 282 bytes to monitor 
0x7fc353268af0 
Jun 15 15:37:55 chimera udevd-event[21368]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:37:55 chimera udevd-event[21368]: seq 1930 exit with 0 
Jun 15 15:37:55 chimera udevd[7639]: seq 1930 forked, pid [21368], 'add' 
'usb_endpoint', 0 seconds old 
Jun 15 15:37:55 chimera udevd[7639]: seq 1930 cleanup, pid [21368], status 0, 0 
seconds old 
Jun 15 15:37:56 chimera udevd-event[21356]: '/lib/udev/nm-modem-probe' (stderr) 
'error writing command: 5' 
Jun 15 15:38:02 chimera last message repeated 19 times
Jun 15 15:38:02 chimera udevd-event[21356]: '/lib/udev/nm-modem-probe' (stdout) 
'ID_NM_MODEM_PROBED=1' 
Jun 15 15:38:02 chimera udevd-event[21356]: '/lib/udev/nm-modem-probe' returned 
with status 0 
Jun 15 15:38:02 chimera udevd-event[21356]: RUN 
'socket:@/org/freedesktop/hal/udev_event' /lib/udev/rules.d/90-hal.rules:2 
Jun 15 15:38:02 chimera udevd-event[21356]: no node name set, will use kernel 
name 'ttyACM0' 
Jun 15 15:38:02 chimera udevd-event[21356]: created db file for 
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1:1.0/tty/ttyACM0' in 
'/dev/.udev/db/\x2fdevices\x2fpci0000:00\x2f0000:00:1a.0\x2fusb3\x2f3-1\x2f3-1:1.0\x2ftty\x2fttyACM0'
 
Jun 15 15:38:02 chimera udevd-event[21356]: creating device node 
'/dev/ttyACM0', devnum=166:0, mode=0660, uid=0, gid=20 
Jun 15 15:38:02 chimera udevd-event[21356]: mknod(/dev/ttyACM0, 020660, 
(166,0)) 
Jun 15 15:38:02 chimera udevd-event[21356]: chmod(/dev/ttyACM0, 020660) 
Jun 15 15:38:02 chimera udevd-event[21356]: chown(/dev/ttyACM0, 0, 20) 
Jun 15 15:38:02 chimera udevd-event[21356]: '/dev/char/166:0' with target 
'/dev/ttyACM0' has the highest priority 0, create it 
Jun 15 15:38:02 chimera udevd-event[21356]: creating symlink '/dev/char/166:0' 
to '../ttyACM0' 
Jun 15 15:38:02 chimera udevd-event[21356]: 
'/dev/serial/by-path/pci-0000:00:1a.0-usb-0:1:1.0' with target '/dev/ttyACM0' 
has the highest priority 0, create it 
Jun 15 15:38:02 chimera udevd-event[21356]: creating symlink 
'/dev/serial/by-path/pci-0000:00:1a.0-usb-0:1:1.0' to '../../ttyACM0' 
Jun 15 15:38:02 chimera udevd-event[21356]: 
'/dev/serial/by-id/usb-Motorola_Motorola_USB_Modem-if00' with target 
'/dev/ttyACM0' has the highest priority 0, create it 
Jun 15 15:38:02 chimera udevd-event[21356]: creating symlink 
'/dev/serial/by-id/usb-Motorola_Motorola_USB_Modem-if00' to '../../ttyACM0' 
Jun 15 15:38:02 chimera udevd-event[21356]: passed 750 bytes to monitor 
0x7fc353268f20 
Jun 15 15:38:02 chimera udevd-event[21356]: passed -1 bytes to monitor 
0x7fc353257670 
Jun 15 15:38:02 chimera udevd-event[21356]: seq 1925 exit with 0 
Jun 15 15:38:02 chimera udevd[7639]: seq 1925 cleanup, pid [21356], status 0, 7 
seconds old 
Jun 15 15:38:02 chimera nm-system-settings:    SCPlugin-Ifupdown: device added 
(udi: 
/org/freedesktop/Hal/devices/usb_device_22b8_3802_noserial_if0_serial_unknown_0,
 iface: (null)): iface not found
Jun 15 15:38:02 chimera NetworkManager: <info>  (ttyACM0): found serial port 
(udev:  hal:GSM) 
Jun 15 15:38:02 chimera NetworkManager: <info>  (ttyACM0): ignoring due to lack 
of probed mobile broadband capabilties 

Here is the probe:

L: main(): (/dev/ttyACM0): usb-vid 0x0000  usb-pid 0x0000  usb-intf 0  driver 
'(null)'
L: main(): probing /dev/ttyACM0
L: modem_send_command(): Sending: 'AT+GCAP

'
L: modem_wait_reply(): Got: 'A'
L: modem_wait_reply(): Got: 'AT+'
L: modem_wait_reply(): Got: 'AT+G'
L: modem_wait_reply(): Got: 'AT+GCAP'
L: modem_wait_reply(): Got: 'AT+GCAP


+GCAP: +FCLASS


OK


'
L: modem_probe_caps(): GCAP response: +GCAP: +FCLASS
L: modem_send_command(): Sending: 'AT+GMM

'
L: modem_wait_reply(): Got: 'A'
L: modem_wait_reply(): Got: 'AT'
L: modem_wait_reply(): Got: 'AT+G'
L: modem_wait_reply(): Got: 'AT+GMM


A910


OK

'
ID_NM_MODEM_PROBED=1
L: main(): /dev/ttyACM0: caps (0x20)

-- 
Network-Manager not seeing broadband card
https://bugs.launchpad.net/bugs/360905
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