EDID problem - Apple LCD/ Geforce 6800GT

Geforce 6800GT will not display any PC bios screens or Windows boot
screens with this monitor. Same system with Geforce4 4200ti works
perfectly. 6800GT works 100% once in Windows with 41.77 installed- if
and only if I boot with an analog VGA monitor attached at same time.
EVGA cards manufacturer is blaming it on Apple.


Here is the EDID information from the monitor. Any ideas about what
might be going on? Why would the 4200ti be able to display text mode
and 640x480 boot resolutions without a problem?

Monitor
Windows description......... Plug and Play Monitor
Manufacturer description.... Cinema HD Display
Manufacturer................ Apple
————————————————————————————
Plug and Play ID............ APP921F
Serial number............... [REMOVED]
————————————————————————————
Manufacture date............ 2004, ISO week 31
EDID revision............... 1.3
Display type and signal..... Digital
Sync input support.......... n/a
Screen size................. 490 x 310 mm (~24")
Power management............ Active off/sleep

Color characteristics
Display gamma............... 2.20
Red chromaticity............ Rx 0.640 - Ry 0.332
Green chromaticity.......... Gx 0.288 - Gy 0.601
Blue chromaticity........... Bx 0.146 - By 0.065
White point (default)....... Wx 0.313 - Wy 0.329

Timing characteristics
VESA GTF support............ Not supported
Horizontal scan range.......
Vertical scan range.........
Video bandwidth.............
Timing recommendation....... 1920x1200 at 60Hz
Modeline................ "1920x1200" 153.970 1920 1968 2000 2080
1200 1203 1209 1235 +hsync -vsync

Standard timings supported
1920 x 1200 at 60Hz - Apple
1920 x 1920 at 60Hz - VESA

Raw EDID (1)
00: 00 FF FF FF FF FF FF 00 06 10 1F 92 A3 04 FE 02
10: 1F 0E 01 03 80 31 1F 78 2E CF B5 A3 55 49 99 25
20: 10 50 54 00 00 00 D1 00 01 01 01 01 01 01 01 01
30: 01 01 01 01 01 01 25 3C 80 A0 70 B0 23 40 30 20
40: 36 00 EF 36 11 00 00 1A 00 00 00 FC 00 43 69 6E
50: 65 6D 61 20 48 44 20 44 69 73 00 00 00 FC 00 70
60: 6C 61 79 0A 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 0F

Display adapter
Adapter description......... NVIDIA GeForce4 Ti 4200 (Microsoft
Corporation)
Adapter device ID........... 0x025310DE
Display settings............ 1920x1200, 32bpp

User/computer information
Registered user name........ [removed]
Registered organization..... [removed]
Network user name........... Administrator
Network computer name.......
Windows version ............ Windows XP
Windows build .............. 5.01.2600 Service Pack 2
Installation date .......... 4/11/2104 12:52:51 PM