HRESULT 0xC00D11BF (NS_E_WMP_GOFULLSCREEN

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Description:

Windows Media Player cannot switch to Full Screen. You might need to adjust your Windows display settings. Open display settings in Control Panel, and then try setting Hardware acceleration to Full.%0

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NS_E_WMP_NO_PROTOCOLS_SELECTED	NS_E_WMP_NETWORK_ERROR

NS_E_WMP_GOFULLSCREEN_FAILED

Diagnosing NS_E_WMP_GOFULLSCREEN_FAILED in the Windows Media Player playback path

NS_E_WMP_GOFULLSCREEN_FAILED (0xC00D11BF) is returned when the Player-level transition to full-screen presentation could not be completed.

Record what the Player had already completed because later retries often replace the original evidence. The specific rejected condition is the Player-level transition to full-screen presentation could not be completed.

Controlled playback comparison

Start from the original call and log 0xC00D11BF together with its object and operation phase.
Collect video presence, renderer state, window ownership, monitor geometry, display-mode result and foreground restrictions before changing the machine.
Use this single-variable test: confirm windowed rendering, then request full screen on the active monitor after playback reaches running state.
Repeat on a fresh object if the original predates a configuration, device or resource change.
Validate the expected next operation, not just initial open or object creation.

Actions that obscure the cause

re-encoding the media before testing window and renderer state.

Technical references

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