uqmi not working with newer Modems like Sierra Wireless EM7455
Username: schoerg
Origin: https://bugs.openwrt.org/index.php?do=details&task_id=53
TP-Link TL-WR1043nd-v1, newest LEDE from git (2016-07-15)
Linux lede 4.4.15 #1 Fri Jul 15 19:46:02 UTC 2016 mips GNU/Linux
Sierra Wireless EM7455 in QMI-Mode.
Bus 001 Device 004: ID 1199:9071 Sierra Wireless, Inc.
uqmi is not able to communicate with this modem, when entering
root@lede:~# uqmi -d /dev/cdc-wdm0 --get-capabilities
It just remains in this state indefinitly, no response is getting back.
When aborting the command with Ctrl+C, this messages is printed:
root@lede:~# uqmi -d /dev/cdc-wdm0 --get-capabilities ^C"Failed to connect to service"
dmesg output when Modem is connected:
[ 319.523044] qcserial 1-1:1.0: Qualcomm USB modem converter detected [ 319.529870] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB0 [ 319.554844] qcserial 1-1:1.2: Qualcomm USB modem converter detected [ 319.561611] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB1 [ 319.583843] qcserial 1-1:1.3: Qualcomm USB modem converter detected [ 319.590664] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB2 [ 319.614610] qmi_wwan 1-1:1.8: cdc-wdm0: USB WDM device [ 319.621172] qmi_wwan 1-1:1.8 wwan0: register 'qmi_wwan' at usb-ehci-platform-1, WWAN/QMI device, e2:7a:a6:3d:40:c5