# EM7455 USB3 cable not working on eval kit

**URL:** https://forum.sierrawireless.com/t/em7455-usb3-cable-not-working-on-eval-kit/18907
**Category:** MC/EM Series
**Created:** [January 7, 2020, 10:08pm UTC](https://forum.sierrawireless.com/t/em7455-usb3-cable-not-working-on-eval-kit/18907 "2020-01-07T22:08:59Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![dchou4u](https://avatars.discourse-cdn.com/v4/letter/d/e9a140/32.png) [@dchou4u](https://forum.sierrawireless.com/u/dchou4u)
#### Post date: [January 7, 2020, 10:08pm UTC](https://forum.sierrawireless.com/t/em7455-usb3-cable-not-working-on-eval-kit/18907/1 "2020-01-07T22:08:59Z")

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Hi, I have the Sierra Wireless eval kit board for the EM7455 module. The kit ships with the blue USB3 cable. However when connecting the eval kit to my Ubuntu 14.04, I do not see the /dev/ttyUSBx devices being created when using the USB3 cable. But when I connect using the normal USB2 cable, I do see the /dev/ttyUSBx devices.

Any idea why?

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### Author: ![Vianney](https://avatars.discourse-cdn.com/v4/letter/v/71e660/32.png) [@Vianney](https://forum.sierrawireless.com/u/Vianney)
#### Post date: [January 8, 2020, 4:00am UTC](https://forum.sierrawireless.com/t/em7455-usb3-cable-not-working-on-eval-kit/18907/2 "2020-01-08T04:00:08Z")

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Hi,  
In my setup, USB3 cable always works well. Please answer and do some following steps to help you figure out your issue:  
1/ Please make sure your USB3 port on your Ubuntu works fine. if possible, please capture the log that your Ubuntu detects the EM7455 connected to it using USB3 cable.  
2/ What is the driver version that you installed on your Ubuntu  
3/ Because my Ubuntu version is 16.04. You could try upgrading to the newer Ubuntu version.