Just as an update, unloading the g_ether and loading g_serial results in a working serial port at /dev/ttyGS0. Of course, the usb ethernet doesn't work after this, and the modules can't be loaded at the same time.
# modprobe g_serial modprobe: ERROR: could not insert 'g_serial': No such device # rmmod g_ether # modprobe g_serial # systemctl start serial-getty@ttyGS0.service resulting host lsusb: Bus 003 Device 033: ID 0525:a4a7 Netchip Technology, Inc. Linux-USB Serial Gadget (CDC ACM mode) Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 2 Communications bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0525 Netchip Technology, Inc. idProduct 0xa4a7 Linux-USB Serial Gadget (CDC ACM mode) bcdDevice 4.04 iManufacturer 1 Linux 4.4.39-ti-r75 with musb-hdrc iProduct 2 Gadget Serial v2.4 iSerial 0 bNumConfigurations 1 OTG Descriptor: bLength 3 bDescriptorType 9 bmAttributes 0x03 SRP (Session Request Protocol) HNP (Host Negotiation Protocol) Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 78 bNumInterfaces 2 bConfigurationValue 2 iConfiguration 4 CDC ACM config bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 500mA Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 0 bInterfaceCount 2 bFunctionClass 2 Communications bFunctionSubClass 2 Abstract (modem) bFunctionProtocol 1 AT-commands (v.25ter) iFunction 7 CDC Serial Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 2 Communications bInterfaceSubClass 2 Abstract (modem) bInterfaceProtocol 1 AT-commands (v.25ter) iInterface 5 CDC Abstract Control Model (ACM) CDC Header: bcdCDC 1.10 CDC Call Management: bmCapabilities 0x00 bDataInterface 1 CDC ACM: bmCapabilities 0x02 line coding and serial state CDC Union: bMasterInterface 0 bSlaveInterface 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000a 1x 10 bytes bInterval 9 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 10 CDC Data bInterfaceSubClass 0 Unused bInterfaceProtocol 0 iInterface 6 CDC ACM Data 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 0 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 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 2 Communications bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) Thanks, Jeremy On Thursday, 22 December 2016 23:05:49 UTC+10, Jeremy Herbert wrote: > > Hi, > > I've just installed this image ( > https://rcn-ee.com/rootfs/bb.org/testing/2016-12-18/console/BBB-blank-debian-8.6-console-armhf-2016-12-18-2gb.img.xz > > ) on a BBB rev C, and a BBB with the 2GB flash. Both are behaving the same. > They show up as an ethernet device, but not as a serial port. lsusb on the > host confirms that they are not behaving as a serial port: > > Bus 003 Device 030: ID 0525:a4a2 Netchip Technology, Inc. Linux-USB > Ethernet/RNDIS Gadget > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 2 Communications > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > idVendor 0x0525 Netchip Technology, Inc. > idProduct 0xa4a2 Linux-USB Ethernet/RNDIS Gadget > bcdDevice 4.04 > iManufacturer 1 BeagleBoard.org > iProduct 2 BeagleBoneBlack > iSerial 3 2513BBBK4941 > bNumConfigurations 2 > OTG Descriptor: > bLength 3 > bDescriptorType 9 > bmAttributes 0x03 > SRP (Session Request Protocol) > HNP (Host Negotiation Protocol) > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 78 > bNumInterfaces 2 > bConfigurationValue 2 > iConfiguration 0 > bmAttributes 0xe0 > Self Powered > Remote Wakeup > MaxPower 500mA > Interface Association: > bLength 8 > bDescriptorType 11 > bFirstInterface 0 > bInterfaceCount 2 > bFunctionClass 2 Communications > bFunctionSubClass 6 Ethernet Networking > bFunctionProtocol 0 > iFunction 6 RNDIS > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 1 > bInterfaceClass 2 Communications > bInterfaceSubClass 2 Abstract (modem) > bInterfaceProtocol 255 Vendor Specific (MSFT RNDIS?) > iInterface 4 RNDIS Communications Control > CDC Header: > bcdCDC 1.10 > CDC Call Management: > bmCapabilities 0x00 > bDataInterface 1 > CDC ACM: > bmCapabilities 0x00 > CDC Union: > bMasterInterface 0 > bSlaveInterface 1 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x82 EP 2 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0008 1x 8 bytes > bInterval 9 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 0 > bNumEndpoints 2 > bInterfaceClass 10 CDC Data > bInterfaceSubClass 0 Unused > bInterfaceProtocol 0 > iInterface 5 RNDIS Ethernet Data > 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 0 > 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 0 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 91 > bNumInterfaces 2 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0xe0 > Self Powered > Remote Wakeup > MaxPower 500mA > Interface Association: > bLength 8 > bDescriptorType 11 > bFirstInterface 0 > bInterfaceCount 2 > bFunctionClass 2 Communications > bFunctionSubClass 6 Ethernet Networking > bFunctionProtocol 0 > iFunction 11 CDC ECM > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 1 > bInterfaceClass 2 Communications > bInterfaceSubClass 6 Ethernet Networking > bInterfaceProtocol 0 > iInterface 8 CDC Ethernet Control Model (ECM) > CDC Header: > bcdCDC 1.10 > CDC Union: > bMasterInterface 0 > bSlaveInterface 1 > CDC Ethernet: > iMacAddress 9 9059af55826a > bmEthernetStatistics 0x00000000 > wMaxSegmentSize 1514 > wNumberMCFilters 0x0000 > bNumberPowerFilters 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x82 EP 2 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0010 1x 16 bytes > bInterval 9 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 10 CDC Data > bInterfaceSubClass 0 Unused > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 1 > bNumEndpoints 2 > bInterfaceClass 10 CDC Data > bInterfaceSubClass 0 Unused > bInterfaceProtocol 0 > iInterface 10 CDC Ethernet Data > 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 0 > 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 0 > Device Qualifier (for other device speed): > bLength 10 > bDescriptorType 6 > bcdUSB 2.00 > bDeviceClass 2 Communications > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > bNumConfigurations 2 > Device Status: 0x0000 > (Bus Powered) > > I have two BBGW which appear fine as ttyACM0 and ttyACM1, but I haven't > reflashed them from the stock image. Is there a way to enable this on the > BBB image? > > Thanks, > Jeremy > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/d1dbb221-19ad-422e-a8d9-36fb0361f0ac%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.