a web app receives no device-motion or orientation events
This symptom concerns the sensor path. Start with a neutral DeviceOK test where available so the next step is based on evidence rather than a generic reset sequence.
Do not jump to the most invasive fix
Avoid destructive resets, unofficial driver packages, firmware flashing, or replacing hardware before the simpler detection, permission, connection and configuration checks are exhausted.
Retest the same condition
After every meaningful change, repeat the same test under the same conditions and compare the result.
Rule out the simple causes
- 1
Run DeviceOK Motion Sensor Test over HTTPS on the physical mobile/tablet device.
- 2
Grant motion/orientation permission if the browser requests it.
- 3
Check browser compatibility and compare a second supported browser.
Work through the problem in order
- 1
If native compass/motion apps work but the browser does not, treat it as browser permission/support first.
- 2
If neither browser nor OEM diagnostics see the sensor, a wider device sensor issue is possible.
- 3
Do not infer accelerometer/gyroscope hardware failure solely from an unsupported browser.
If the matching DeviceOK test succeeds, prioritize the affected app, browser policy, operating-system setting, or configuration before assuming complete hardware failure.
If the same capability also fails in DeviceOK and another trusted diagnostic path, broaden the investigation to connection, operating-system/device state, official driver or firmware support, and finally hardware.