IDP3.0 Issue

Issue	Root Cause	How
Luci Web UI can not show modem info	Bug in: /lib/network/usb-modem.sh	Method1: Relpace the "usb-modem.sh" 0. Prepare a USB disk 1. Copy the usb-modem.tar to USB disk 2. Insert the USB to ARK-2151S platform that had booted up with IDP3.0 image. 3. Check device name of this USB disk: #fdisk -l example: /dev/sdc 4. Copy the file to target system #cp /media/sdc/usb-modem.tar . 5. unzip the tar file # tar xvf usb-modem.tar 6. replace the /lib/network/usb-modem.sh #cp ./usb-modem.sh /lib/network/usb-modem.sh 7. reboot & confirm luci web page does show 3g modem information Method 2: Replace $project/layers/wr-idp/wr-idp-devkit/recipes-core/netifd/files/lib/network/usb-modem.sh
3G module will loss (1.connect to internet, 2. warm reboot, 3. usb interface )	system doesn't disconnect connection in shutdown	Replace the attached netifd.service and netifd-systemd-wrapper (in 3g_loss_issue.zip ) to the following files: netifd-systemd-wrapper under /sbin/ netifd.service under /lib/systemd/system/