Hi all. For about the last 10 days my SP3 has been unwilling to auto-rotate, and I've exhausted my web searching skills. Things I have eliminated/tried: Rotation Lock is not on Every conceivable option in the Display Settings area (to be clear, I can manually set portrait/landscape normal/flipped, and it obeys) Reboot, including power+vol-up option Logged in as different (Administrator) user Surface Diagnostic App from the store -I note the app in the store doesn't seem to have an orientation sensor test -A prior test application referenced here Microsoft Surface Diagnostic Toolkit (Surface) sounds like it did have a test for the sensor, but the current download appears not to. Looked for sensors in Device Manager that search results suggested (expecting broken driver) - not actually there Enabled any Services that sounded like Sensors that weren't already running Any other suggestions, and/or does anyone have a source for the previous diagnostic tools? Thanks!