[systemd-devel] Problem with netwrok broadband modem

[Christian Gagneraud]

Hi,

I'm trying to use a USB broadband modem with ofono and connman, when i 
plug the modem, i get an error from systemd "Failed to load device unit: 
Invalid argument" (full log below).

Is it looking for a dev-tty at .device file?

As i'm having trouble to get ofono working, I wonder if the problem 
doesn't come from here instead, or even perhaps it's due to the 
manufaturer and serial number of the USB device being garbage...

Any hints or directions would be greatly appreciated.

thanks,
Chris

PS: I'm using systemd-29, kernel 2.6.39 on an embedded ARM based device, 
and  hand crafted distro with ptxdist 
(http://www.ptxdist.org/software/ptxdist/index_en.html)

[ 2386.720000] usb 1-2: new full speed USB device number 8 using at91_ohci
[ 2386.900000] usb 1-2: New USB device found, idVendor=12d1, idProduct=1001
[ 2386.900000] usb 1-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=1
[ 2386.900000] usb 1-2: Product: HUAWEI Mobile
[ 2386.900000] usb 1-2: Manufacturer: �ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ
[ 2386.900000] usb 1-2: SerialNumber: �ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ
[ 2386.910000] scsi14 : usb-storage 1-2:1.0
[ 2386.910000] usb 1-2: USB disconnect, device number 8
[ 2387.410000] usb 1-2: new full speed USB device number 9 using at91_ohci
[ 2387.590000] usb 1-2: New USB device found, idVendor=12d1, idProduct=1001
[ 2387.590000] usb 1-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=1
[ 2387.590000] usb 1-2: Product: HUAWEI Mobile
[ 2387.590000] usb 1-2: Manufacturer: �ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ
[ 2387.590000] usb 1-2: SerialNumber: �ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ�ÿ
[ 2387.600000] option 1-2:1.0: GSM modem (1-port) converter detected
[ 2387.610000] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
[ 2387.610000] option 1-2:1.1: GSM modem (1-port) converter detected
[ 2387.610000] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
[ 2387.610000] option 1-2:1.2: GSM modem (1-port) converter detected
[ 2387.610000] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB2
[ 2387.620000] scsi18 : usb-storage 1-2:1.3
 >[ 2387.730000] systemd[1]: Failed to load device unit: Invalid argument
 >[ 2387.740000] systemd[1]: dev-ttyUSB2.device changed dead -> plugged
 >[ 2387.750000] systemd[1]: 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.2-ttyUSB2-tty-ttyUSB2.device 
changed dead -> plugged
 >[ 2387.750000] systemd[1]: Running GC...
 >[ 2387.750000] systemd[1]: Collecting 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.3-host13-target13:0:0-13:0:0:1-block-sda.device
 >[ 2387.750000] systemd[1]: Collecting dev-sda.device
 >[ 2387.750000] systemd[1]: Collecting 
dev-disk-by\x2did-usb\x2dHUAWEI_SD_Storage_\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xe
 >[ 2387.750000] systemd[1]: Collecting 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.0-ttyUSB0-tty-ttyUSB0.device
 >[ 2387.750000] systemd[1]: Collecting dev-ttyUSB0.device
 >[ 2387.750000] systemd[1]: Collecting 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.1-ttyUSB1-tty-ttyUSB1.device
 >[ 2387.750000] systemd[1]: Collecting dev-ttyUSB1.device
 >[ 2387.770000] systemd[1]: Failed to load device unit: Invalid argument
 >[ 2387.790000] systemd[1]: dev-ttyUSB0.device changed dead -> plugged
 >[ 2387.790000] systemd[1]: 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.0-ttyUSB0-tty-ttyUSB0.device 
changed dead -> plugged
 >[ 2387.790000] systemd[1]: Failed to load device unit: Invalid argument
 >[ 2387.800000] systemd[1]: dev-ttyUSB1.device changed dead -> plugged
 >[ 2387.800000] systemd[1]: 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.1-ttyUSB1-tty-ttyUSB1.device 
changed dead -> plugged
[ 2388.630000] scsi 18:0:0:0: CD-ROM            HUAWEI   Mass Storage 
   2.31 PQ: 0 ANSI: 2
[ 2388.640000] scsi 18:0:0:1: Direct-Access     HUAWEI   SD Storage 
   2.31 PQ: 0 ANSI: 2
[ 2388.700000] sd 18:0:0:1: [sda] Attached SCSI removable disk
 >[ 2388.800000] systemd[1]: 
dev-disk-by\x2did-usb\x2dHUAWEI_SD_Storage_\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\xc3\xbf\d
 >[ 2388.800000] systemd[1]: dev-sda.device changed dead -> plugged
 >[ 2388.800000] systemd[1]: 
sys-devices-platform-at91_ohci-usb1-1\x2d2-1\x2d2:1.3-host18-target18:0:0-18:0:0:1-block-sda.device 
changed dead -> plugged