[adicarlo]

Found in the bin: an LG AD600 WLAN modem.

I'm running usb-modeswitch version 2.3.0 (2.3.0+repack0-1 debian package) and linux 4.5.0.

On plugging in, the device does enumerate, is sensed, shows a red light. After a few seconds, udev or systemd or whoever runs usb-modeswitch on it, but I don't think its going from storage mode to any other mode. The (large) dongle's red light goes out, some seconds pass, and then it starts blinking blue.

It's possible that all is well, and that any difficulties are are result from using an inactive SIM card.

So -- is this normal? I'm thinking not, since the log says "mode switching may have failed".

If not, if someone is willing to work on it, I'm willing to donate the hardware! Please reply on the thread and I'll PM you.

Below are logs for reference:

syslog:

Code: Select all

May 13 23:05:56 salsa kernel: [303013.537044] usb 1-10.7: new high-speed USB device number 20 using xhci_hcd
May 13 23:06:04 salsa kernel: [303021.728566] usb 1-10.7: new high-speed USB device number 21 using xhci_hcd
May 13 23:06:04 salsa kernel: [303021.820675] usb 1-10.7: New USB device found, idVendor=1004, idProduct=6190
May 13 23:06:04 salsa kernel: [303021.820679] usb 1-10.7: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 13 23:06:04 salsa kernel: [303021.820680] usb 1-10.7: Product: LGE USB Device
May 13 23:06:04 salsa kernel: [303021.820681] usb 1-10.7: Manufacturer: LGE
May 13 23:06:04 salsa kernel: [303021.820682] usb 1-10.7: SerialNumber: 012413000454778
May 13 23:06:04 salsa kernel: [303021.824039] usb-storage 1-10.7:1.0: USB Mass Storage device detected
May 13 23:06:04 salsa kernel: [303021.824182] scsi host14: usb-storage 1-10.7:1.0
May 13 23:06:04 salsa systemd[1]: Starting USB_ModeSwitch__1-10.7...
May 13 23:06:05 salsa usb_modeswitch: switch device 1004:6190 on 001/021
May 13 23:06:25 salsa systemd[1]: Started USB_ModeSwitch__1-10.7.

usb_modeswitch_1-10.7:

Code: Select all

USB_ModeSwitch log from Fri May 13 23:11:42 EDT 2016

Use global config file: /etc/usb_modeswitch.conf

Started via systemd
Raw args from udev: _1-10.7

Use top device dir /sys/bus/usb/devices/1-10.7
Check class of first interface ...
 Interface 0 class is 08.

----------------
USB values from sysfs:
  manufacturer	LGE
  product	LGE USB Device
  serial	012413000454778
----------------
bNumConfigurations is 1 - don't check for active configuration
Found packed config collection /usr/share/usb_modeswitch/configPack.tar.gz
ConfigList: pack/1004:6190 pack/
SCSI attributes not needed, move on
Check config: pack/1004:6190
! matched. Read config data
Extract config 1004:6190 from collection /usr/share/usb_modeswitch/configPack.tar.gz
Driver module is "option", ID path is /sys/bus/usb-serial/drivers/option1

Unbinding driver
Command to be run:
usb_modeswitch -W -D -u -1 -b 1 -g 23 -v 1004 -p 6190 -f $flags(config)

Verbose debug output of usb_modeswitch and libusb follows
(Note that some USB errors are to be expected in the process)
--------------------------------

Read long config from command line

 * usb_modeswitch: handle USB devices with multiple modes
 * Version 2.3.0 (C) Josua Dietze 2015
 * Based on libusb1/libusbx

 ! PLEASE REPORT NEW CONFIGURATIONS !

DefaultVendor=  0x1004
DefaultProduct= 0x6190
TargetVendor=   0x1004
TargetProduct=  0x61a7

StandardEject=1
System integration mode enabled

Use given bus/device number: 001/023 ...
Look for default devices ...
 bus/device number matched
  found USB ID 1004:6190
   vendor ID matched
   product ID matched
 Found devices in default mode (1)
Get the current device configuration ...
Use interface number 0
Use endpoints 0x01 (out) and 0x81 (in)

USB description data (for identification)
-------------------------
Manufacturer: LGE
     Product: LGE USB Device
  Serial No.: 012413000454778
-------------------------
Sending standard EJECT sequence
Looking for active driver ...
 No active driver found. Detached before or never attached
Set up interface 0
Use endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 1 (CSW) ...
 Response successfully read (13 bytes).
Trying to send message 2 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 2 (CSW) ...
 Response successfully read (13 bytes).
Reset response endpoint 0x81
Reset message endpoint 0x01
ok:busdev
--------------------------------
(end of usb_modeswitch output)

Check success of mode switch for max. 20 seconds ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...

Target config not matching - current values are
    1-10.7:1.0/bInterfaceClass: 08
    bConfigurationValue:       1
    bNumConfigurations:        1
    busnum:                    1
    devnum:                    23
    idProduct:                 6190
    idVendor:                  1004
    manufacturer:              LGE
    product:                   LGE USB Device
    serial:                    012413000454778

Mode switching may have failed. Exit

[LOM]

On plugging in, the device does enumerate, is sensed, shows a red light. After a few seconds, udev or systemd or whoever runs usb-modeswitch on it, but I don't think its going from storage mode to any other mode. The (large) dongle's red light goes out, some seconds pass, and then it starts blinking blue.

The led blinks blue when the dongle is ready to connect to a network, it is a good indication that the dongle has switched from storage-only mode to modem mode.
Which usb id does lsusb show at that point?

[adicarlo]

The led blinks blue when the dongle is ready to connect to a network, it is a good indication that the dongle has switched from storage-only mode to modem mode.
Which usb id does lsusb show at that point?

Still showing as a bulk storage device at this point:

Code: Select all

Bus 001 Device 014: ID 1004:6190 LG Electronics, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x1004 LG Electronics, Inc.
  idProduct          0x6190 
  bcdDevice           11.80
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              4 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1

[Josh]

I get reports about this problem from time to time. It's not exactly clear what the cause is; it might be in the modem firmware or it might be the combination of modem and host hardware/driver. I don't think the SIM card is involved.

Did you ever use it with a Windows system?

One thing to try is the additional 'MessageContent' that you find in the config file "19d2:2000", after the 'StandardEject' line.
It's just some storage command but some people have reported that it is required to complete the mode switch.

[adicarlo]

I get reports about this problem from time to time. It's not exactly clear what the cause is; it might be in the modem firmware or it might be the combination of modem and host hardware/driver. I don't think the SIM card is involved.

Ok, cool, thanks for the clarification.

Did you ever use it with a Windows system?

Hmm, no, would that be useful/interesting? I do have a windows XP box sitting here but usually I leave it powered down...

One thing to try is the additional 'MessageContent' that you find in the config file "19d2:2000", after the 'StandardEject' line.
It's just some storage command but some people have reported that it is required to complete the mode switch.

Pardon me, not sure I follow. I'm using the debian packaged version. After extracting the config file 19d2:2000 from there, it has these contents:

Code: Select all

# ZTE devices, some Onda devices
TargetVendor= 0x19d2
TargetProductList="0001,0002,0015,0016,0017,0019,0024,0031,0033,0037,0042,0052,0055,0061,0063,0064,0066,0091,0108,0117,0128,0151,0157,0177,1402,2002,2003"
StandardEject=1
MessageContent="55534243123456702000000080000c85010101180101010101000000000000"

Yet, I wonder, why are you pointing me at this file? The device enumerates as:

Bus 001 Device 016: ID 1004:6190 LG Electronics, Inc.

The file that goes with this device seems to be 1004:6190, which reads:

Code: Select all

# LG AD600
TargetVendor=0x1004
TargetProduct=0x61a7
StandardEject=1

[Josh]

Sorry for being not really clear ...

Take the config file for your modem that you found. Put it into the folder "/etc/usb_modeswitch.d".

Edit it and add the line below the "StandardEject" line in the config file "19d2:2000".

Now your config file should look similar to the latter one:

Code: Select all

# LG AD600
TargetVendor=0x1004
TargetProduct=0x61a7
StandardEject=1
MessageContent="55534243123456702000000080000c85010101180101010101000000000000"

[adicarlo]

Josh, thanks for the clarification.

Added the line you identified, and now I'm getting:

Code: Select all

May 19 19:17:34 salsa kernel: [205552.260719] usb 1-10.7: new high-speed USB device number 17 using xhci_hcd
May 19 19:17:42 salsa kernel: [205560.196253] usb 1-10.7: new high-speed USB device number 18 using xhci_hcd
May 19 19:17:42 salsa kernel: [205560.288189] usb 1-10.7: New USB device found, idVendor=1004, idProduct=6190
May 19 19:17:42 salsa kernel: [205560.288194] usb 1-10.7: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 19 19:17:42 salsa kernel: [205560.288195] usb 1-10.7: Product: LGE USB Device
May 19 19:17:42 salsa kernel: [205560.288196] usb 1-10.7: Manufacturer: LGE
May 19 19:17:42 salsa kernel: [205560.288197] usb 1-10.7: SerialNumber: 012413000454778
May 19 19:17:42 salsa kernel: [205560.292068] usb-storage 1-10.7:1.0: USB Mass Storage device detected
May 19 19:17:42 salsa kernel: [205560.292287] scsi host11: usb-storage 1-10.7:1.0
May 19 19:17:42 salsa systemd[1]: Starting USB_ModeSwitch__1-10.7...
May 19 19:17:42 salsa root: usb_modeswitch: use overriding config file /etc/usb_modeswitch.d/1004:6190; make sure this is intended
May 19 19:17:42 salsa root: usb_modeswitch: please report any new or corrected settings; otherwise, check for outdated files
May 19 19:17:42 salsa usb_modeswitch: switch device 1004:6190 on 001/018

And in /var/log/usb_modeswitch_1-10.7:

Code: Select all

USB_ModeSwitch log from Thu May 19 19:17:42 EDT 2016

Use global config file: /etc/usb_modeswitch.conf

Started via systemd
Raw args from udev: _1-10.7

Use top device dir /sys/bus/usb/devices/1-10.7
Check class of first interface ...
 Interface 0 class is 08.

----------------
USB values from sysfs:
  manufacturer  LGE
  product       LGE USB Device
  serial        012413000454778
----------------
bNumConfigurations is 1 - don't check for active configuration
Found packed config collection /usr/share/usb_modeswitch/configPack.tar.gz
ConfigList: /etc/usb_modeswitch.d/1004:6190 pack/1004:6190 pack/
SCSI attributes not needed, move on
Check config: /etc/usb_modeswitch.d/1004:6190
! matched. Read config data
Use config file from override folder /etc/usb_modeswitch.d
Logger is /usr/bin/logger
Driver module is "option", ID path is /sys/bus/usb-serial/drivers/option1

Unbinding driver
Command to be run:
usb_modeswitch -W -D -u -1 -b 1 -g 18 -v 1004 -p 6190 -f $flags(config)

Verbose debug output of usb_modeswitch and libusb follows
(Note that some USB errors are to be expected in the process)
--------------------------------

Read long config from command line

 * usb_modeswitch: handle USB devices with multiple modes
 * Version 2.3.0 (C) Josua Dietze 2015
 * Based on libusb1/libusbx

 ! PLEASE REPORT NEW CONFIGURATIONS !

DefaultVendor=  0x1004
DefaultProduct= 0x6190
TargetVendor=   0x1004
TargetProduct=  0x61a7

StandardEject=1
MessageContent="55534243123456702000000080000c85010101180101010101000000000000"
System integration mode enabled

Use given bus/device number: 001/018 ...
Look for default devices ...
 bus/device number matched
  found USB ID 1004:6190
   vendor ID matched
   product ID matched
 Found devices in default mode (1)
Get the current device configuration ...
Use interface number 0
Use endpoints 0x01 (out) and 0x81 (in)

USB description data (for identification)
-------------------------
Manufacturer: LGE
     Product: LGE USB Device
  Serial No.: 012413000454778
-------------------------
Sending standard EJECT sequence
Looking for active driver ...
 No active driver found. Detached before or never attached
Set up interface 0
Use endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 1 (CSW) ...
 Response successfully read (13 bytes).
Trying to send message 2 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 2 (CSW) ...
 Response successfully read (13 bytes).
Trying to send message 3 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 3 (CSW) ...
 Response reading failed (error -9)
 Device is gone, skip any further commands
ok:busdev
--------------------------------
(end of usb_modeswitch output)

Check success of mode switch for max. 20 seconds ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...
 Read attributes ...

Target config not matching - current values are
    1-10.7:1.0/bInterfaceClass: 08
    bConfigurationValue:       1
    bNumConfigurations:        1
    busnum:                    1
    devnum:                    18
    idProduct:                 6190
    idVendor:                  1004
    manufacturer:              LGE
    product:                   LGE USB Device
    serial:                    012413000454778

Mode switching may have failed. Exit

Anything else I should try?

Or, care to own this baby?

[LOM]

You have the dongle connected to port 7 on a multiport hub, try it on a simpler usb port.
Your usb bus 1 has 10 hubs connected? What kind of hardware is this?

[adicarlo]

You have the dongle connected to port 7 on a multiport hub, try it on a simpler usb port.
Your usb bus 1 has 10 hubs connected? What kind of hardware is this?

It's a Supermicro Z87. Pretty standard linux rig.

The hub is not the problem. Due to hard experience, I try to connect everything through hubs when possible. However, connecting the device right to the front panel connector, which goes right to the mobo, still shows the same behavior, and specficially, a failure, after modifying the config, with the response to message 3, just as before:

Code: Select all

Trying to send message 3 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 3 (CSW) ...
 Response reading failed (error -9)
 Device is gone, skip any further commands

[Josh]

Do you provide the hub with external power? USB modems typically use the full 500 mA that are standardized as the max in the USB specification.

[adicarlo]

Do you provide the hub with external power? USB modems typically use the full 500 mA that are standardized as the max in the USB specification.

I do indeed. And, moreover, the behavior is identical when plugged directly into one of the mobo USB ports.

Next thing to try?

[Josh]

Annother variable to adjust would be the timing of the mode switch.

In your custom config file, add the line "WaitBefore=5". Any changes?

[adicarlo]

Annother variable to adjust would be the timing of the mode switch.

In your custom config file, add the line "WaitBefore=5". Any changes?

Oh, ah, oh, ah! Looks like some progress is made! Now I'm seeing the modeswitching seems to complete, and a block device as well as some ttyACM# devices show up.

Here's the usb_modeswitch debug file:

Code: Select all

USB_ModeSwitch log from Sat May 21 16:17:59 EDT 2016

Use global config file: /etc/usb_modeswitch.conf

Started via systemd
Raw args from udev: _1-14

Use top device dir /sys/bus/usb/devices/1-14
Check class of first interface ...
 Interface 0 class is 08.

----------------
USB values from sysfs:
  manufacturer  LGE
  product       LGE USB Device
  serial        012413000454778
----------------
bNumConfigurations is 1 - don't check for active configuration
Found packed config collection /usr/share/usb_modeswitch/configPack.tar.gz
ConfigList: /etc/usb_modeswitch.d/1004:6190 pack/1004:6190 pack/
SCSI attributes not needed, move on
Check config: /etc/usb_modeswitch.d/1004:6190
! matched. Read config data
Use config file from override folder /etc/usb_modeswitch.d
Logger is /usr/bin/logger
Driver module is "option", ID path is /sys/bus/usb-serial/drivers/option1

Delay time of 5 seconds
 wait is over, start mode switch
Unbinding driver
Command to be run:
usb_modeswitch -W -D -u -1 -b 1 -g 26 -v 1004 -p 6190 -f $flags(config)

Verbose debug output of usb_modeswitch and libusb follows
(Note that some USB errors are to be expected in the process)
--------------------------------

Read long config from command line

 * usb_modeswitch: handle USB devices with multiple modes
 * Version 2.3.0 (C) Josua Dietze 2015
 * Based on libusb1/libusbx

 ! PLEASE REPORT NEW CONFIGURATIONS !

DefaultVendor=  0x1004
DefaultProduct= 0x6190
TargetVendor=   0x1004
TargetProduct=  0x61a7

StandardEject=1
MessageContent="55534243123456702000000080000c85010101180101010101000000000000"
System integration mode enabled

Use given bus/device number: 001/026 ...
Look for default devices ...
 bus/device number matched
  found USB ID 1004:6190
   vendor ID matched
   product ID matched
 Found devices in default mode (1)
Get the current device configuration ...
Use interface number 0
Use endpoints 0x01 (out) and 0x81 (in)

USB description data (for identification)
-------------------------
Manufacturer: LGE
     Product: LGE USB Device
  Serial No.: 012413000454778
-------------------------
Sending standard EJECT sequence
Looking for active driver ...
 No active driver found. Detached before or never attached
Set up interface 0
Use endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 1 (CSW) ...
 Response successfully read (13 bytes).
Trying to send message 2 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 2 (CSW) ...
 Response successfully read (13 bytes).
Trying to send message 3 to endpoint 0x01 ...
 OK, message successfully sent
Read the response to message 3 (CSW) ...
 Response reading failed (error -9)
 Device is gone, skip any further commands
ok:busdev
--------------------------------
(end of usb_modeswitch output)

Check success of mode switch for max. 20 seconds ...
 Wait for device file system (1 sec.) ...
 Wait for device file system (2 sec.) ...
 Read attributes ...
 All attributes matched
Mode switching was successful, found 1004:61a7 (LGE: LGE USB Device)
 No vendor-specific class found, skip driver check
Check for AVOID_RESET_QUIRK kernel attribute
 AVOID_RESET_QUIRK activated

All done, exit

I believe that indicates all is well?

Here's my '1004:6190' file with the overridden settings:

Code: Select all

# LG AD600
TargetVendor=0x1004
TargetProduct=0x61a7
StandardEject=1
MessageContent="55534243123456702000000080000c85010101180101010101000000000000"
WaitBefore=5

[Josh]

My suspicion was that the stick probably wants to be initialized completely as a storage device.

The USB storage driver has a built-in delay before actually using and accessing a storage device, in order to allow any USB hard disk to spin up. Earlier kernels have that delay pre-set at 5 seconds, but newer kernels have it reduced to 1 second.

If you don't want to wait for those 5 seconds, you can experiment with the "delay_use" value of the storage driver. There is a convenience feature built into the usb_modeswitch wrapper; you can make it set the amount of seconds that you want. Just edit "/etc/usb_modeswitch.conf".

Once you have reduced the value, you can also try to reduce the "WaitBefore" amount.

[LOM]

Please provide a lsusb -vd listing for 1004:61a7 now when you finally got it to switch.