On Fri, 2014-08-01 at 21:44 +0530, Rahul Bedarkar wrote: > 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 The device is actually switched from "fake CD" mode to modem mode by usb_modeswitch, and it appears that usb_modeswitch is failing to do that here sometimes. You should probably debug the usb_modeswitch stuff a bit more first. usb_modeswitch provides a udev helper (/usr/lib/udev/usb_modeswitch) that calls the main usb_modeswitch binary whenever a known device is inserted. You might get some more info by turning on udev verbose logging, or by modifying /etc/usb_modeswitch.conf and setting EnableLogging=1. Dan > [ 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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to 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