v18.2.0: Manual reset swaps roll/pitch on chest and thigh trackers #14

New Issue

MrUnknownDE · 2026-04-05T17:53:34+02:00

MrUnknownDE commented

2026-04-05 17:53:34 +02:00

Originally created by @AlfaKeNTAvR on 3/15/2026

Description

After upgrading from v18.1.0 to v18.2.0, performing a manual reset causes roll and pitch to be swapped on chest and thigh trackers. This did not occur on v18.1.0.

Automatic mounting calibration resolves the issue, but manual reset alone produces incorrect orientation.

Steps to reproduce

Install SlimeVR v18.2.0 (Flatpak, Linux)
Connect Sony Mocopi trackers via MoSlime (BLE to SlimeVR bridge)
Tracker setup: chest, hip, thighs, and ankles
Perform a manual reset while standing with arms down
Sit down on a chair and lean forward
Observe that roll and pitch are swapped on chest and thigh trackers

Screenshot

After full reset standing up with arms down, then sitting on a chair and leaning forward:

Expected behavior

Manual reset should preserve correct roll/pitch orientation, as it did in v18.1.0.

Workaround

Use automatic mounting calibration instead of manual reset
Downgrade to v18.1.0

Environment

SlimeVR v18.2.0 (Flatpak, Linux)
Confirmed working on v18.1.0 (.deb, same machine)
Sony Mocopi trackers connected via MoSlime (BLE to SlimeVR bridge)
Tracker setup: chest, hip, thighs, ankles

*Originally created by @AlfaKeNTAvR on 3/15/2026* ## Description After upgrading from v18.1.0 to v18.2.0, performing a manual reset causes roll and pitch to be swapped on chest and thigh trackers. This did not occur on v18.1.0. Automatic mounting calibration resolves the issue, but manual reset alone produces incorrect orientation. ## Steps to reproduce 1. Install SlimeVR v18.2.0 (Flatpak, Linux) 2. Connect Sony Mocopi trackers via MoSlime (BLE to SlimeVR bridge) 3. Tracker setup: chest, hip, thighs, and ankles 4. Perform a manual reset while standing with arms down 5. Sit down on a chair and lean forward 6. Observe that roll and pitch are swapped on chest and thigh trackers ## Screenshot After full reset standing up with arms down, then sitting on a chair and leaning forward: <img width="955" height="835" alt="Image" src="https://github.com/user-attachments/assets/b13877d4-8f38-4dd8-bb76-e50a13828a4f" /> ## Expected behavior Manual reset should preserve correct roll/pitch orientation, as it did in v18.1.0. ## Workaround - Use automatic mounting calibration instead of manual reset - Downgrade to v18.1.0 ## Environment - SlimeVR v18.2.0 (Flatpak, Linux) - Confirmed working on v18.1.0 (.deb, same machine) - Sony Mocopi trackers connected via MoSlime (BLE to SlimeVR bridge) - Tracker setup: chest, hip, thighs, ankles

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bscotch/server-rewrite-temp

hannah/steam

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bscotch/accel-mount

dependabot/github_actions/gradle/actions-6

dependabot/github_actions/pnpm/action-setup-5

dependabot/github_actions/actions/upload-artifact-7

dependabot/github_actions/actions/download-artifact-8

FloorClipSteamLinkInteractionFix

sapphire/trim-vrm-json

llelievr/trackers-udp-tests

sapphire/linux-bridge-kotlin

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sapphire/stay-aligned-setup-no-step-skip

sapphire/steamvr-hands-warning

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feat/new-updater

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Reference: github/SlimeVR-Server#14