# Starling 2 max no odometry even with qvio enabled

Source: https://forum.modalai.com/topic/4924/starling-2-max-no-odometry-even-with-qvio-enabled
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2025-12-13 00:12:29 UTC by Muqing Cao
Replies: 7 · Views: 866

## Muqing Cao · 2025-12-13 00:12:29 UTC

we have got a starling 2 max and enabled the qvio service. In GUI the qvio outputs good odometry:
![db488b9b07b254472823980e0480dbf.jpg](https://forum.modalai.com/assets/uploads/files/1765584657941-db488b9b07b254472823980e0480dbf.jpg) 

However, in px4 mavlink list, we cannot find the odometry mavlink message. And the local position estimate gives very high velocity even when the drone is static:
![b4fa8ac4458362d29fc232c1e7c0e28.jpg](https://forum.modalai.com/assets/uploads/files/1765584711182-b4fa8ac4458362d29fc232c1e7c0e28.jpg) 

This is the list of qvio services running:
![86d619342e09c446bda4e69e5785c4c.jpg](https://forum.modalai.com/assets/uploads/files/1765584604942-86d619342e09c446bda4e69e5785c4c.jpg)

## Reply by Eric Katzfey (ModalAI staff) · 2025-12-13 16:46:01 UTC

@Muqing-Cao In the voxl-vision-hub configuration file `/etc/modalai/voxl-vision-hub.conf` how is the parameter `en_vio` set?

## Reply by Muqing Cao · 2025-12-13 22:31:13 UTC (in reply to Eric Katzfey)

@Eric-Katzfey 
en_vio is set to true
![dc0161f432a1120456ae57f54a496c5.jpg](https://forum.modalai.com/assets/uploads/files/1765665071205-dc0161f432a1120456ae57f54a496c5.jpg)

## Reply by Muqing Cao · 2025-12-16 17:58:36 UTC

@Eric-Katzfey any idea how to resolve this? we need to get the position mode flying soon. thanks.

## Reply by zauberflote1 (ModalAI staff) · 2025-12-16 18:53:38 UTC (in reply to Muqing Cao)

@Muqing-Cao 
Can you confirm your SDK version?

## Reply by Muqing Cao · 2025-12-16 20:11:36 UTC (in reply to zauberflote1)

@zauberflote1 it's 1.5.1

## Reply by Zachary Lowell 0 · 2025-12-16 22:15:03 UTC

@Muqing-Cao you have voxl-open-vins-server and voxl-qvio-server running at the same time.  **Only one can be run** - modalAI defaulted to open-vins as the main method for positioning - if you have both running, you are bound to run into conflicting errors.

## Reply by Muqing Cao · 2025-12-17 00:41:31 UTC (in reply to Zachary Lowell 0)

@Zachary-Lowell-0 after turning off open-vins and rebooting it works. thanks!