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From: galla rao <galla.rao80@gmail.com>
Date: Tue, 12 Mar 2019 05:29:50 +0000
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Subject: Legacy VBIOS and GOP driver
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Hi All,

This query is specific to Display Panel types for LCD interface

*CSM+Legacy VBIOS*
LCD display panel with HDMI interface - No Display in BIOS but in Windows
Display is seen

*Non-CSM+GOP Driver*
Both Display in BIOS and in Windows shows up


EDID  which is complaint for 1.3 is enabled,
VBIOS does not support HDMI for Legacy Oprom's ?

GOP driver constructs VBT based on Timing descriptors and supports HDMI
interface for LFP/EFP panel types?

Please enlighten me with the knowledge that is required for this specific
issue

There was a similar discussion in Open formus

 (
https://forums.geforce.com/default/topic/1003241/no-signal-from-hdmi-on-post-bios-only-when-windows-loads-/



Best Regards

Galla