I’m attempting to get a Verizon 8800L hotspot working via USB tethering with the Jetson Nano. My success has only been partial. While I can get Internet access with it at times, here is the trouble I’ve encountered:
- After I connect the hotspot to the Nano via USB, it will work for an unspecified amount of time, however eventually it will stop working. When I connect the hotspot up to my Linux server (Ubuntu Mate 20.04) via USB, Internet access does not eventually cease.
- For reference, here is what dmesg displays when the hotspot is connected to the Nano and it’s providing Internet access (I’ve modified what is displayed here for the MAC address, though the serial number is at appears in dmesg):
[ 3093.516203] usb 2-1.3: new SuperSpeed USB device number 5 using tegra-xusb
[ 3093.542855] usb 2-1.3: New USB device found, idVendor=1410, idProduct=b020
[ 3093.542864] usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3093.542870] usb 2-1.3: Product: MiFi 8800L
[ 3093.542875] usb 2-1.3: Manufacturer: Novatel Wireless
[ 3093.542881] usb 2-1.3: SerialNumber: 0123456789ABCDEF
[ 3093.557338] cdc_ether 2-1.3:1.0 eth1: register 'cdc_ether' at usb-70090000.xusb-1.3, CDC Ethernet Device, 00:11:22:33:44:55
[ 3093.559413] hid-generic 0003:1410:B020.0007: hidraw2: USB HID v1.01 Device [Novatel Wireless MiFi 8800L] on usb-70090000.xusb-1.3/input2
- And here is what I noticed dmesg lists after Internet access stops working:
cdc_ether2-1.3:1.0 eth1: kevent 12 may have been dropped
- The following is secondary to resolving the above. It seems that the applications I’m using to access the internet are “sluggish” and upload speeds are consistently less than anticipated. Specifics below.
- I noticed when using Chromium, for example, pages don’t seem to fully load, or take longer to do so when connected via the hotspot. This occurs regardless of what site I visit or the type of content I’m trying to view, and continue to occur regardless of where the modem is located. This type trouble does not occur when the hotspot is connected to my Linux server, and it does not occur on the Nano when I’m connected via WiFi or Ethernet.
- To get a better idea of what my downstream and upstream speeds are, I used speedtest-cli. After running it for at least ten iterations, I found that the upload in particular came in at less than 50% of what I was getting on my Linux server. To clarify, the modem was kept in the same spot when testing either computer, and I also specified the same server to use during the tests.
It’s possible my dmesg information is not complete and I can try and do a better job of obtaining it. That said, it gets a little difficult at times given the intermittent nature of the trouble.
I would greatly appreciate help in resolving these problems.