# "Your vehicle is not responding" please reconnect **URL:** \ **Category:** Using QGroundControl\ **Created:** [June 19, 2020, 2:26pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258 "2020-06-19T14:26:05Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Alex\_thomz](https://discuss.px4.io/user_avatar/discuss.px4.io/alex_thomz/32/5119_2.png) [@Alex\_thomz](https://discuss.px4.io/u/Alex_thomz)\ **Post date:** [June 19, 2020, 2:26pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/1 "2020-06-19T14:26:05Z")
![WhatsApp Image 2020-06-19 at 10.32.16 AM](https://discuss.px4.io/uploads/default/original/2X/1/1062fb50fe1f7f0465ddf7b09957bb8455aa5a62.jpeg) Anyone here came across same or similar situation? ---
**Author:** ![DonLakeFlyer](https://discuss.px4.io/user_avatar/discuss.px4.io/donlakeflyer/32/3036_2.png) [@DonLakeFlyer](https://discuss.px4.io/u/DonLakeFlyer)\ **Post date:** [June 19, 2020, 9:39pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/2 "2020-06-19T21:39:51Z")
This means that there is no mavlink traffic coming from Vehicle-\>QGC on the comm link. Can mean: - Firmware is hosed up somehow - Comm link is bad - Bad USB cable - Your are connected over USB to a Cube Orange/Yellow which is a composite USB device which QGC doesn’t handle correctly yet. In that case you can ignore the error and things should still work fine. ---
**Author:** ![Alex\_thomz](https://discuss.px4.io/user_avatar/discuss.px4.io/alex_thomz/32/5119_2.png) [@Alex\_thomz](https://discuss.px4.io/u/Alex_thomz)\ **Post date:** [June 20, 2020, 6:22am UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/3 "2020-06-20T06:22:58Z")
![WhatsApp Image 2020-06-20 at 8.55.15 AM](https://discuss.px4.io/uploads/default/original/2X/2/2bb752ad1466586c0f075f77148540d62a9014a5.jpeg) this is screenshot from commlink manager ---
**Author:** ![Alex\_thomz](https://discuss.px4.io/user_avatar/discuss.px4.io/alex_thomz/32/5119_2.png) [@Alex\_thomz](https://discuss.px4.io/u/Alex_thomz)\ **Post date:** [June 20, 2020, 6:59am UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/4 "2020-06-20T06:59:19Z")
![WhatsApp Image 2020-06-20 at 9.52.53 AM](https://discuss.px4.io/uploads/default/original/2X/b/bc6c1dfa2106975cc3c97218c8c4ed506f0e2535.jpeg) Still the same , no changes, but it works with mission planner ---
**Author:** ![DonLakeFlyer](https://discuss.px4.io/user_avatar/discuss.px4.io/donlakeflyer/32/3036_2.png) [@DonLakeFlyer](https://discuss.px4.io/u/DonLakeFlyer)\ **Post date:** [June 20, 2020, 3:39pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/5 "2020-06-20T15:39:21Z")
Are you running some sort of custom firmware. There are heartbeats coming from a component using the id `MAV_COMP_ID_USER1` but not heartbeats from a `MAV_COMP_ID_AUTOPILOT1` component which is what QGC needs to understand there is a vehicle on the other side of the connection. ---
**Author:** ![Alex\_thomz](https://discuss.px4.io/user_avatar/discuss.px4.io/alex_thomz/32/5119_2.png) [@Alex\_thomz](https://discuss.px4.io/u/Alex_thomz)\ **Post date:** [June 20, 2020, 4:17pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/6 "2020-06-20T16:17:23Z")
No , We did not do anything with the firmware, it worked perfectly well past week . It is working currently with mission planner as well. there is this previous error "vehicle is not responding when connected to QGC, although the updating of firmware is going smooth " We tried running QGC on Ubuntu and then we got an error "error on link ttyACM0,access denied. So we did a quick check on -all comm ports and drivers -USB cable and nothing changed ---
**Author:** ![DonLakeFlyer](https://discuss.px4.io/user_avatar/discuss.px4.io/donlakeflyer/32/3036_2.png) [@DonLakeFlyer](https://discuss.px4.io/u/DonLakeFlyer)\ **Post date:** [June 20, 2020, 6:20pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/7 "2020-06-20T18:20:17Z")
> [@Alex\_thomz](#): > > "error on link ttyACM0,access denied You need to futz with modemmanager to get usb connect to work on linux. What kind of board are you running and what exact firmware is on it? ---
**Author:** ![Alex\_thomz](https://discuss.px4.io/user_avatar/discuss.px4.io/alex_thomz/32/5119_2.png) [@Alex\_thomz](https://discuss.px4.io/u/Alex_thomz)\ **Post date:** [June 20, 2020, 6:39pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/8 "2020-06-20T18:39:50Z")
Ok so you mean, I got to check with modem manager and check usb connections etc? I am using Pixhawk ( 2.4.8) by Hex , running px4 firmware version 1.11 ---
**Author:** ![DonLakeFlyer](https://discuss.px4.io/user_avatar/discuss.px4.io/donlakeflyer/32/3036_2.png) [@DonLakeFlyer](https://discuss.px4.io/u/DonLakeFlyer)\ **Post date:** [June 21, 2020, 8:23pm UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/9 "2020-06-21T20:23:57Z")
Look here [https://dev.px4.io/v1.9.0/en/setup/dev\_env\_linux\_ubuntu.html](https://dev.px4.io/v1.9.0/en/setup/dev_env_linux_ubuntu.html) for Permission Setup and modemmanager. QGC should tell you at boot though is these are wrong. ---
**Author:** ![Alex\_thomz](https://discuss.px4.io/user_avatar/discuss.px4.io/alex_thomz/32/5119_2.png) [@Alex\_thomz](https://discuss.px4.io/u/Alex_thomz)\ **Post date:** [June 22, 2020, 6:45am UTC](https://discuss.px4.io/t/your-vehicle-is-not-responding-please-reconnect/17258/10 "2020-06-22T06:45:44Z")
ModemManger was not installed . I did the flashing to Master Dev version as well , but no change.