Hi,
I have USB modem which has also support for micro SD card.
With kernel version 3.15 and later, I am facing a issue with modem
interface detection. When I connect it first time only storage
interface is detected. I had to disconnect it and reconnect it again.
This issue is not seen with kernel version 3.11.
Following are dmesg logs with version 3.15
After USB modem attached first time
[ 44.044105] usb 4-1: USB disconnect, device number 3
[ 52.764071] usb 1-1: new high-speed USB device number 4 using ehci-pci
[ 52.898661] usb 1-1: New USB device found, idVendor=1c9e, idProduct=f000
[ 52.898667] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
[ 52.898670] usb 1-1: Product: USB Modem
[ 52.898672] usb 1-1: Manufacturer: USB Modem
[ 52.898675] usb 1-1: SerialNumber: 1234567890ABCDEF
[ 53.479638] usb-storage 1-1:1.0: USB Mass Storage device detected
[ 53.479889] scsi4 : usb-storage 1-1:1.0
[ 53.480139] usbcore: registered new interface driver usb-storage
[ 54.480352] scsi 4:0:0:0: CD-ROM USBModem Disk
2.31 PQ: 0 ANSI: 2
[ 54.485187] sr1: scsi-1 drive
[ 54.485575] sr 4:0:0:0: Attached scsi CD-ROM sr1
[ 54.486557] sr 4:0:0:0: Attached scsi generic sg2 type 5
After disconnecting and connecting it again.
[ 119.964616] usb 1-1: USB disconnect, device number 4
[ 126.736117] usb 1-1: new high-speed USB device number 5 using ehci-pci
[ 126.870805] usb 1-1: New USB device found, idVendor=1c9e, idProduct=f000
[ 126.870813] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
[ 126.870818] usb 1-1: Product: USB Modem
[ 126.870822] usb 1-1: Manufacturer: USB Modem
[ 126.870826] usb 1-1: SerialNumber: 1234567890ABCDEF
[ 126.872936] usb-storage 1-1:1.0: USB Mass Storage device detected
[ 126.873225] scsi5 : usb-storage 1-1:1.0
[ 127.873602] scsi 5:0:0:0: CD-ROM USBModem Disk
2.31 PQ: 0 ANSI: 2
[ 127.877304] sr1: scsi-1 drive
[ 127.877740] sr 5:0:0:0: Attached scsi CD-ROM sr1
[ 127.878452] sr 5:0:0:0: Attached scsi generic sg2 type 5
[ 130.122519] usb 1-1: USB disconnect, device number 5
[ 130.488100] usb 1-1: new high-speed USB device number 6 using ehci-pci
[ 130.622919] usb 1-1: New USB device found, idVendor=1c9e, idProduct=9605
[ 130.622926] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
[ 130.622931] usb 1-1: Product: USB Modem
[ 130.622935] usb 1-1: Manufacturer: USB Modem
[ 130.622939] usb 1-1: SerialNumber: 1234567890ABCDEF
[ 131.265801] usb-storage 1-1:1.4: USB Mass Storage device detected
[ 131.265991] scsi6 : usb-storage 1-1:1.4
[ 131.363101] usbcore: registered new interface driver usbserial
[ 131.363126] usbcore: registered new interface driver usbserial_generic
[ 131.363143] usbserial: USB Serial support registered for generic
[ 131.446570] usbcore: registered new interface driver option
[ 131.446593] usbserial: USB Serial support registered for GSM modem (1-port)
[ 131.446737] option 1-1:1.0: GSM modem (1-port) converter detected
[ 131.451834] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
[ 131.451933] option 1-1:1.1: GSM modem (1-port) converter detected
[ 131.452394] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
[ 131.452471] option 1-1:1.2: GSM modem (1-port) converter detected
[ 131.452574] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
[ 131.452636] option 1-1:1.3: GSM modem (1-port) converter detected
[ 131.452733] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB3
[ 132.265188] scsi 6:0:0:0: Direct-Access USBModem Disk
2.31 PQ: 0 ANSI: 2
[ 132.268559] sd 6:0:0:0: Attached scsi generic sg2 type 0
[ 132.271063] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[ 135.440547] option1 ttyUSB3: option_instat_callback: error -2
[ 152.486473] option1 ttyUSB3: option_instat_callback: error -2
lsusb -d 1c9e:9605 -v
Bus 001 Device 006: ID 1c9e:9605 OMEGA TECHNOLOGY
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1c9e OMEGA TECHNOLOGY
idProduct 0x9605
bcdDevice 0.00
iManufacturer 3
iProduct 2
iSerial 4
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 131
bNumInterfaces 5
bConfigurationValue 1
iConfiguration 1
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
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 32
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 32
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 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 5
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Regards,
Rahul
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