On Tue, Oct 3, 2017 at 4:51 PM, Kristian Evensen <kristian.evensen@xxxxxxxxx> wrote: > Disabling the timer caused a different error to be triggered. Instead > of "HC died...", I now get the following message looping over and > over: > > [16870.871935] qmi_wwan 4-1:1.4: Tx URB error: -19 I was not thinking clearly when I wrote the email. The reason this message kept looping over and over was that I kept trying to communicate with the modem. When I stopped my tool, the message stopped. However, the host controller is still dead, so even if I try to disconnect the device using GPIO, nothing happens. I thought the log of when the error occurred was lost due to limited buffers, but I was wrong and I have the following in dmesg when the error strikes: [15986.400431] usb 4-1: USB disconnect, device number 13 [15986.400454] qmi_wwan 4-1:1.4: nonzero urb status received: -71 [15986.411366] qmi_wwan 4-1:1.4: wdm_int_callback - 0 bytes [15986.416692] qmi_wwan 4-1:1.4: wdm_int_callback - usb_submit_urb failed with result -19 [15986.424816] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [15986.432886] option 4-1:1.0: device disconnected [15986.437647] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [15986.445765] option 4-1:1.1: device disconnected [16001.110698] xhci-hcd f10f8000.usb3: Stopped the command ring failed, maybe the host is dead [16001.119077] xhci-hcd f10f8000.usb3: Abort command ring failed [16001.124949] xhci-hcd f10f8000.usb3: HC died; cleaning up [16100.854819] qmi_wwan 4-1:1.4: Tx URB error: -19 [16105.854944] qmi_wwan 4-1:1.4: Tx URB error: -19 [16110.855052] qmi_wwan 4-1:1.4: Tx URB error: -19 [16115.855159] qmi_wwan 4-1:1.4: Tx URB error: -19 [16120.855285] qmi_wwan 4-1:1.4: Tx URB error: -19 [16125.855396] qmi_wwan 4-1:1.4: Tx URB error: -19 I am bit surprised to see the HC-related messages. Maybe I missed a place where the timer is stopped or something, time to investigate! -Kristian -- 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
