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aleksander0m
Posts: 8
Joined: Wed Nov 11, 2015 9:50 pm

Unexpected unbind for Option HSO modems

Post by aleksander0m » Wed Jan 11, 2017 1:26 pm

Hey,

Since some time ago dcbw and me have a couple of Option modems that no longer work properly in ModemManager, because it seems that usb_modeswitch unbinds them from the hso driver and they never get re-bound again.

Manually doing "rmmod hso && modprobe hso" makes the hso0 network interface be exposed again.

usb_modeswitch log:

Code: Select all

$ cat /var/log/usb_modeswitch_4-1.5.3 

USB_ModeSwitch log from Wed Jan 11 12:19:20 CET 2017

Use global config file: /etc/usb_modeswitch.conf

Started via systemd
Raw args from udev: _4-1.5.3

Use top device dir /sys/bus/usb/devices/4-1.5.3
Check class of first interface ...
 Interface 0 class is ff.

----------------
USB values from sysfs:
  manufacturer	Option N.V.
  product	Globetrotter HSDPA Modem
  serial	Serial Number
----------------
bNumConfigurations is 1 - don't check for active configuration
ConfigList: /usr/share/usb_modeswitch/0af0:6971
SCSI attributes not needed, move on
Check config: /usr/share/usb_modeswitch/0af0:6971
! matched. Read config data
Unbinding driver
Command to be run:
usb_modeswitch -W -D -u -1 -b 4 -g 60 -v 0af0 -p 6971 -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 2.4.0 (C) Josua Dietze 2016
 * Based on libusb1/libusbx

 ! PLEASE REPORT NEW CONFIGURATIONS !

DefaultVendor=  0x0af0
DefaultProduct= 0x6971
TargetClass=    0xff
OptionMode=1
System integration mode enabled

Use given bus/device number: 004/060 ...
Look for default devices ...
 bus/device number matched
  found USB ID 0af0:6971
   vendor ID matched
   product ID matched
   target class ff matches
   device not counted, target class reached
 No devices in default mode found. Nothing to do. Bye!

--------------------------------
(end of usb_modeswitch output)


Core program reported switching failure. Exit
This is the full lsusb of the modem:

Code: Select all

$ lsusb -v -d 0af0:6971

Bus 004 Device 062: ID 0af0:6971 Option Globetrotter HSDPA Modem
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0        64
  idVendor           0x0af0 Option
  idProduct          0x6971 Globetrotter HSDPA Modem
  bcdDevice            0.00
  iManufacturer           1 
  iProduct                2 
  iSerial                 4 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           95
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              3 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval             128
        INTERFACE CLASS:  03 24 03
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              3 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              3 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval             128
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0

LOM
Posts: 1289
Joined: Wed Jul 11, 2012 3:14 pm
Location: Koh Samui, TH

Re: Unexpected unbind for Option HSO modems

Post by LOM » Wed Jan 11, 2017 2:37 pm

0af0:6971 is the id for a device with a single interface (virtual cd-rom storage) but the same id is also used for the switched device.
usb_modeswitch detects that your device is already switched so it skips switching, the problem is that the driver should not had been unloaded for a skipped device. It is indeed a bug!

Code: Select all

T: Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 7 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0af0 ProdID=6971 Rev= 0.00
S: Manufacturer=Option N.V.
S: Product=Globetrotter HSDPA Modem
S: SerialNumber=Serial Number
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=84(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=05(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms 

Josh
Site Admin
Posts: 6534
Joined: Sat Nov 03, 2007 12:30 am

Re: Unexpected unbind for Option HSO modems

Post by Josh » Wed Jan 11, 2017 6:58 pm

Ouch!

Needs fixing. Thanks for the report!

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