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Regarding dual headed IOFramebuffer instances

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Regarding dual headed IOFramebuffer instances

Subject: Regarding dual headed IOFramebuffer instances
From: selvaganesan <email@hidden>
Date: Tue, 27 Feb 2007 12:05:52 +0530

Dear all,

IOFramebuffer subclasses may implement functionality where a single
framebuffer drives multiple displays. This is not recommended or fully
supported and instead multihead cards should implement multiple
instances of IOFramebuffer objects to provide full functionality.

1. Why can't we implement full functionality of extended display with
single head cards?
2. Has multihead a two IOFrameBuffer objects to support extended display?

Thanx in advance

selva.
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