Linus Gasser <list@xxxxxxxxxxxxxxxxxx> writes: > I'm trying to get an USB-modem running on a Smileplug, which is some > Arm7-device, using it with the kernel 3.12-6. As far as I can tell > it's an USB3-port. It works well with harddisks, but when I plug in > USB-modems, it always fails sooner or later. Do you have this problem with different modems? > Jan 08 22:04:18 Profeda-new pppd[958]: local IP address 10.6.27.36 > Jan 08 22:04:18 Profeda-new pppd[958]: remote IP address 10.64.64.64 > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB0: option_instat_callback: error -108 > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB0: usb_wwan_indat_callback: resubmit read urb failed. (-2) > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB0: usb_wwan_indat_callback: resubmit read urb failed. (-2) > Jan 08 22:04:33 Profeda-new pppd[958]: Hangup (SIGHUP) > Jan 08 22:04:33 Profeda-new pppd[958]: Modem hangup > Jan 08 22:04:33 Profeda-new pppd[958]: Connect time 0.3 minutes. > Jan 08 22:04:33 Profeda-new pppd[958]: Sent 504 bytes, received 84 bytes. > Jan 08 22:04:33 Profeda-new pppd[958]: Connection terminated. > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB0: usb_wwan_indat_callback: resubmit read urb failed. (-2) > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 > Jan 08 22:04:33 Profeda-new kernel: option 3-1:1.0: device disconnected > Jan 08 22:04:33 Profeda-new kernel: cdc_ncm 3-1:1.1 wwan0: unregister 'cdc_ncm' usb-0000:02:00.0-1, Mobile Broadband Network Device > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 > Jan 08 22:04:33 Profeda-new kernel: option 3-1:1.2: device disconnected > Jan 08 22:04:33 Profeda-new kernel: option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2 > Jan 08 22:04:33 Profeda-new kernel: option 3-1:1.3: device disconnected The modem disconnected from the bus. There isn't much you can do about this on the host side. Either the firmware crashed, or the device powered down for some other reason. You could try a powered hub to eliminate any power related problems. But if the port can power a harddisk spinning up, then I guess it should handle the 3G modem power spikes too. Anyway, a hub is a cheap and simple test. Bjørn -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
