ubuntu-x-swat team mailing list archive

[Franck <alci@xxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-nouveau

Edid on this laptop cannot be read, and consequently nouveau driver will
have a black screen.

get-edid: get-edid version 2.0.0
	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
	Function supported
	Call successful

	VBE version 300
	VBE string at 0x11100 "NVIDIA"

VBE/DDC service about to be called
	Report DDC capabilities

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
	Function supported
	Call successful

	Monitor and video card combination does not support DDC1 transfers
	Monitor and video card combination does not support DDC2 transfers
	0 seconds per 128 byte EDID block transfer
	Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
	Read EDID

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
	Function supported
	Call failed

The EDID data should not be trusted as the VBE call failed
Error: output block unchanged


Notice that NVidia proprietary driver also fails the same way, but it has a workaround with the custom edid option.

Option         "CustomEDID" "DFP-0:/etc/X11/SNY05FA.bin"

Nouveau driver does not seem to have such option.

** Affects: xserver-xorg-video-nouveau (Ubuntu)
     Importance: Undecided
         Status: New

-- 
edid cannot be read on Sony VPCCW2S1E and nouveau fails
https://bugs.launchpad.net/bugs/629516
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