Latitude 7440 - No "auto rotation" option

[pdes]

When using the 7440 in Tablet mode, the screen will not rotate to portrait mode. I am running Windows 11 with the latest BIOS. There is no reference to a bios setting that can change this. My wife is running Windows 11 on her new HP 2 in 1 and has no issues turning the laptop in a full tablet mode. She has the "rotation lock" in System>Display which is greyed out but shows as "on". I don't have this option in my Display settings. I have used Chat GPT to try to see whats missing but there is nothing tin the Device Manager that corelates with the suggestions in Chat GPT except for the registry entry at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AutoRotation. This says "enabled" with a value of "1".

Can anyone throw some light on why the auto-rotate function just doessnt show on my Latitude?

 

[Scarlet12]

The auto-rotation sensor driver might be missing or not functioning properly. Check Device Manager under Sensors for an "Accelerometer" or "Kionix" device—if missing, try installing the latest chipset and sensor drivers from Dell’s support site. Also, verify that the "Sensor Monitoring Service" is running (services.msc). If Rotation Lock is missing, Windows might not be detecting the device as a convertible—try reinstalling Intel’s Dynamic Platform and Thermal Framework (DPTF) drivers.