the screen rotation on my show 15 is stuck in portrait even though i have it mounted in landscape.

Diagnosis

The Amazon Echo Show 15 utilizes a built-in accelerometer and gyroscope to determine its physical orientation. When the screen remains stuck in portrait mode despite a landscape mount, it typically indicates a software "lock" where the Auto-Rotate feature has been disabled, or the device's orientation sensor has encountered a calibration error. Because the Echo Show 15 is designed to be mounted, it sometimes fails to register the transition from a handheld state (during setup) to a fixed wall state, causing the OS to default to the portrait layout. To confirm this is a software lock rather than a hardware failure, attempt to manually toggle the rotation settings. If the screen does not flip immediately upon toggling the "Auto-Rotate" switch, the device is likely experiencing a sensor hang. This is often caused by a cached system state that believes the device is still being held vertically, or a firmware glitch that prevents the accelerometer from triggering the display flip.

How to Fix It

To force the Echo Show 15 back into landscape mode, follow these precise steps to reset the display orientation:

1. Swipe down from the top of the screen to open the Quick Settings menu.
2. Select Settings (the gear icon) from the list of options.
3. Navigate to Display.
4. Locate the Auto-Rotate Screen toggle. If it is already ON, toggle it OFF and then back ON again to refresh the sensor polling.
5. If the screen remains in portrait, manually select the Landscape orientation option if available in the display sub-menu.
6. Physically tilt the device (if not permanently bolted) or gently shake the frame to trigger the accelerometer. The screen should snap to landscape within 1-3 seconds of the movement.
7. Return to the Home screen and wait 10 seconds to ensure the layout does not revert to portrait.

If That Didn't Work

• Perform a Hard Power Cycle: Unplug the power adapter from the wall outlet entirely. Wait exactly 60 seconds to allow the capacitors on the motherboard to fully discharge. Plug the device back in. This forces the gyroscope to recalibrate its "zero point" upon boot-up, which often clears orientation freezes.
• Check for Firmware Updates: Go to Settings > Device Options > Check for Software Updates. An outdated version of Fire OS can cause conflicts with the accelerometer drivers. Ensure you are on the latest build, as Amazon frequently releases patches for orientation bugs on the Show 15.
• Factory Reset as a Last Resort: If the sensor is completely unresponsive, perform a factory reset. Swipe down, go to Settings > Device Options > Reset to Factory Defaults. This will wipe all personalized widgets and settings but will reset the hardware abstraction layer (HAL) that controls the screen rotation.
• Inspect Mounting Brackets: Ensure the device is sitting flush against the wall mount. If the device is tilted at an extreme angle (more than 15 degrees off a true horizontal plane), the accelerometer may struggle to decide between portrait and landscape, causing it to default to the safest orientation (portrait).

Heads Up

• Avoid Third-Party Mounts: Using non-official mounts that apply pressure to the rear chassis can occasionally interfere with the internal sensors or cause the device to overheat, which may lead to erratic screen behavior.
• Widget Layouts: Be aware that some third-party widgets are not optimized for landscape mode; if a specific widget is open, it may appear "stretched" even if the screen is correctly rotated.
• Power Stability: Always use the original Amazon power brick. Undervolting the device via a third-party adapter can cause the system to disable non-essential sensors like the gyroscope to save power.
• Cleaning: When cleaning the screen, avoid applying heavy pressure to the edges of the bezel, as this can slightly warp the frame and put pressure on the accelerometer chip.