[Bug 601376] Re: 2.6.35-6.9 (and newer) kernels having issues with invalid EDID info and ATI Radeon graphics

[nutznboltz]

Same problem with

01:00.0 VGA compatible controller [0300]: nVidia Corporation GT218
[GeForce 210] [10de:0a65] (rev a2)

Monitor: DS-275W


Raw EDID bytes:

  00 ff ff ff ff ff ff 00  1a 36 fa 00 00 00 00 00
  1c 13 01 03 a5 3c 22 78  e2 6f b1 a7 55 4c 9e 25
  0c 50 54 00 00 00 01 01  01 01 01 01 01 01 01 01
  01 01 01 01 01 01 56 5e  00 a0 a0 a0 29 50 30 20
  35 00 55 50 21 00 00 1a  00 00 00 fc 00 31 34 34
  30 50 0a 20 20 20 20 20  20 20 00 00 00 fc 00 20
  2d 57 51 58 47 41 0a 20  20 20 20 20 00 00 00 fc
  00 43 6f 6c 6f 72 20 4c  43 44 0a 20 20 20 01 fc
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff

# get-edid | parse-edid
parse-edid: parse-edid version 2.0.0
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 0x2110 "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 supports 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
EDID claims 255 more blocks left
EDID blocks left is wrong.
Your EDID is probably invalid.
parse-edid: EDID checksum failed - data is corrupt. Continuing anyway.
parse-edid: first bytes don't match EDID version 1 header
parse-edid: do not trust output (if any).

	# EDID version 255 revision 255
Section "Monitor"
	Identifier "___:ffff"
	VendorName "___"
	ModelName "___:ffff"
	# DPMS capabilities: Active off:yes  Suspend:yes  Standby:yes

	Mode 	"4095x4095"	# vfreq 9.770Hz, hfreq 80.018kHz
		DotClock	655.350000
		HTimings	4095 4350 4605 8190
		VTimings	4095 4158 4221 8190
		Flags	"Interlace" "+HSync" "+VSync"
	EndMode
	Mode 	"4095x4095"	# vfreq 9.770Hz, hfreq 80.018kHz
		DotClock	655.350000
		HTimings	4095 4350 4605 8190
		VTimings	4095 4158 4221 8190
		Flags	"Interlace" "+HSync" "+VSync"
	EndMode
	Mode 	"4095x4095"	# vfreq 9.770Hz, hfreq 80.018kHz
		DotClock	655.350000
		HTimings	4095 4350 4605 8190
		VTimings	4095 4158 4221 8190
		Flags	"Interlace" "+HSync" "+VSync"
	EndMode
	Mode 	"4095x4095"	# vfreq 9.770Hz, hfreq 80.018kHz
		DotClock	655.350000
		HTimings	4095 4350 4605 8190
		VTimings	4095 4158 4221 8190
		Flags	"Interlace" "+HSync" "+VSync"
	EndMode
EndSection

-- 
2.6.35-6.9 (and newer) kernels having issues with invalid EDID info and ATI Radeon graphics
https://bugs.launchpad.net/bugs/601376
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