Comment 48 for bug 150709

Okay well near as I can tell my original directions were accurate: `sudo get-edid > edid.dat'

This is what I get on my system:

bryce@blackwold:/tmp$ sudo get-edid > edid.dat
get-edid: get-edid version 1.4.1

 Performing real mode VBE call
 Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
 Function supported
 Call successful

 VBE version 200
 VBE string at 0x11110 "ATI R350"

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 successful

bryce@blackwold:/tmp$ xxd edid.dat
0000000: 00ff ffff ffff ff00 09d1 da76 1d1e 0000 ...........v....
0000010: 2511 0103 6c34 2178 ea5a d5a7 564b 9b24 %...l4!x.Z..VK.$
0000020: 1350 54bd ef80 714f 8190 8180 818c a940 .PT...qO.......@
0000030: b300 0101 0101 283c 80a0 70b0 2340 3020 ......(<..p.#@0
0000040: 3600 0744 2100 001e d509 80a0 205e 6310 6..D!....... ^c.
0000050: 1060 5208 782d 1100 001a 0000 00fd 0038 .`R.x-.........8
0000060: 4c1e 5311 000a 2020 2020 2020 0000 00fc L.S... ....
0000070: 0042 656e 5120 3234 3157 0a20 2020 0065 .BenQ 241W. .e

Valid EDID always starts with those first few bytes 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, if that's any help. If your monitor is putting out something other than that, then maybe we're just screwed here...