Training
Module
Troubleshoot device driver failures - Training
This module focuses on the role of device drivers and troubleshooting problems that pertain to them.
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Windows 8 ensures a flicker-free screen rotation experience by ensuring that the output from the graphics adapter stays enabled during a rotational mode change. This feature is required on all Windows Display Driver Model (WDDM) 1.2 drivers that support rotated modes.
Note Starting with Windows 8.1 Update, device driver interfaces (DDIs) are updated to support the highest possible resolution on cloned monitors when the primary display is rotated. See Supporting Path-Independent Rotation.
Minimum WDDM version: 1.2
Minimum Windows version: 8
Driver implementation—Full graphics and Display only: Mandatory
The display miniport driver must support updating the path rotation when these driver-implemented functions are called:
The driver must indicate support for smooth rotation in a call to DxgkDdiUpdateActiveVidPnPresentPath by setting the DXGK_DRIVERCAPS structure's SupportSmoothRotation member, which is available starting with Windows 8. The driver must always be able to set the path rotation during a call to DxgkDdiCommitVidPn.
On traditional desktop and laptop systems, screen rotation is not a frequently used scenario. But in mobile devices, screen rotation is often a mainstream scenario. Windows 8 enables optimizations to the display infrastructure to ensure that the monitor synchronization stays enabled during screen rotation. End users can experience a smooth rotation transition when the following are true:
Training
Module
Troubleshoot device driver failures - Training
This module focuses on the role of device drivers and troubleshooting problems that pertain to them.