RE: 5855 tablet lost auto rotation
Download Chipset driver on the tablet on a different location. Please uninstall and install Chipset driver.
Goto Control Panel (view by large icons to see all items) | Tablet PC Settings | 'choose the order in which your screen rotates [go to orientation] '.
Change the sequence to the following:
1) Primary portrait
If issue persists, refresh the operating system after backing data and check if you are getting the Slider with auto-rotation.
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