Hi:
I've got an Hitachi CM771 monitor hooked up to an nVidia Geforce2/MX
in a Dell Dimension 8100 running XFree86 4.1.0 under NetBSD-1.5.2.
XFree isn't recognizing any of the PnP/DDC/VESA modes for this
monitor. When I compile the nv, ddc, and i2c drivers with debugging
enabled, I see this error message in XFree86.0.log
Error reading EDID block
from the ddc driver. Hitachi tech support informs me, though, that
the CM771 supports DDC1 and DDC-2B. So, I suspect whatever the
Hitachi returns via DDC isn't being recognized by XFree.
Further, I've seen posts on different lists from others describing various
troubles involving a CM771. Each of them seem to be related to XFree's
rejecting most or all of the configured modes with an "hsync out of range"
error. Again, sounds like not recognizing the EDID (or not getting one)
from the CM771.
FWIW, here's the Monitor section I'm using:
Section "Monitor"
Identifier "Monitor0"
VendorName "Hitachi"
ModelName "CM771"
DisplaySize 366 274
HorizSync 31 - 96
VertRefresh 50 - 160
EndSection
The sync and refresh ranges are from Hitachi tech support. Using
them, the only mode that XFree uses is 1920x1440 at a pixel clock
of 234 Mhz, which is greater than the monitor's maximum frequency
of 203Mhz.
Any ideas as to how to proceed? I've tried the DOS "read-edid"
utility, but it, too, has problems with reading the CM771 EDID.
Chris <[EMAIL PROTECTED]>.
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