Alternate Frame Buffer for Out-of-Band Management Video
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Solution Overview
Problem
Existing systems management approaches for information handling systems are limited in enabling active management controller data and video access, both when the host system is on or off, through a KVM interface, as crash carts can only interface with host system video and do not provide active management while the host system is powered on or off.
Innovation Solution
An information handling system with a management controller that determines the host system's power state, configures a video controller to write management video data to either a primary or alternate frame buffer, allowing output to a management interface display, enabling out-of-band management regardless of the host system's power state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If crash cart interfaces only with host system video, then host system video can be accessed, but management controller data and video cannot be accessed when host is on or off
Solution Approach 1:
The patent segments the frame buffer into multiple regions: a primary frame buffer for host system video and an alternate frame buffer for management controller video. This segmentation allows independent access to management controller data and video regardless of host system state, enabling the crash cart to interface with management video even when the host is powered on or off.
Solution Approach 2:
The patent introduces a frame buffer switching mechanism that acts as an intermediary between the video controller and the display interface. This switching mechanism directs the video controller to output either host system video from the primary frame buffer or management controller video from the alternate frame buffer, enabling flexible access to different video sources based on management needs.
2Adaptability or versatility
If video controller writes to primary frame buffer only, then host system video is displayed, but management video data cannot be output when host is on
Solution Approach 1:
The frame buffer is divided into distinct segments: a primary frame buffer for host video and an alternate frame buffer for management video. This segmentation allows the system to maintain both video streams independently and switch between them as needed, providing video output flexibility without excessive complexity.
Solution Approach 2:
The patent implements a dynamic frame buffer switching mechanism that adapts the video controller's output destination based on the host system's power state and management requirements. The switching mechanism dynamically selects between primary and alternate frame buffers, enabling the system to flexibly output either host video or management video as appropriate.
Data Source
AI summary
A method may include in response to determining a host system is off, configuring a video controller of an information handling system including setting a display resolution of the video controller and writing management video data associated to a primary frame buffer such that management video data is able to be retrieved by the video controller for output to one or both of a first display associated with the host system and a second display of a management interface communicatively coupled to a management controller communicatively coupled to the processor and the memory and configured to provide out-of-band management of the information handling system. The method may further include in response to determining the host system is on, writing the management video data to an alternate frame buffer such that management video data is able to be retrieved by the video controller for output to the second display.