On 4/30/07, Victor Engmark <[EMAIL PROTECTED]> wrote:
Hi all,

I'm trying to create a pristine xorg.conf, but I've been unable to
find proper values for HorizSync and VertRefresh for my Dell Latitude

I've tried the values presented in MonitorsDB
for "Dell 1400x1050 Laptop Display Panel", which are HorizSync
31.5-90.0 and VertRefresh 59.0-75.0, but I get a warning in
/var/log/Xorg.0.log for both of them saying they are "not within DDC

(WW) I810(0): config file hsync range 60-66.3158kHz not within DDC hsync ranges.


It seems that a DDC (or, apparently, DDS) query should be able to
determine these numbers, but


I don't understand why people still configure X the old ancient way.

Follow the FBSD handbook to do a  'Xorg -configure' and a test run of
X with the generated Xorg.conf file.

Then have a look at your your '/var/log/Xorg.0.log'. You will find a
log of  X using DDC  to interrogate your LCD screen for it's
capabilities and the acceptable modelines

A snippet of my Xorg.0.log file
(II) Loading sub module "ddc"
(II) LoadModule: "ddc"
(II) Loading /usr/X11R6/lib/modules/libddc.so
(II) Module ddc: vendor="X.Org Foundation"
       compiled for 6.9.0, module version = 1.0.0
       ABI class: X.Org Video Driver, version 0.8
(II) NV(0): I2C bus "DDC" initialized.
(II) NV(0): Probing for EDID on I2C bus A...
(II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
(II) NV(0): I2C device "DDC:ddc2" removed.
(--) NV(0): DDC detected a CRT:
(II) NV(0): Manufacturer: AOC  Model: a770  Serial#: 30015
(II) NV(0): Year: 1998  Week: 15
(II) NV(0): EDID Version: 1.0
(II) NV(0): Analog Display Input,  Input Voltage Level: 0.714/0.286 V
(II) NV(0): Sync:  Separate
(II) NV(0): Max H-Image Size [cm]: horiz.: 32  vert.: 24
(II) NV(0): Gamma: 1.50
(II) NV(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display
(II) NV(0): redX: 0.622 redY: 0.340   greenX: 0.282 greenY: 0.600
(II) NV(0): blueX: 0.147 blueY: 0.062   whiteX: 0.278 whiteY: 0.311
(II) NV(0): Supported VESA Video Modes:
(II) NV(0): Manufacturer's mask: 0
(II) NV(0): Supported Future Video Modes:
(II) NV(0): #0: hsize: 640  vsize 480  refresh: 85  vid: 22833
(II) NV(0): #1: hsize: 800  vsize 600  refresh: 85  vid: 22853
(II) NV(0): #2: hsize: 1024  vsize 768  refresh: 85  vid: 22881


(==) NV(0): Using gamma correction (1.0, 1.0, 1.0)
(II) NV(0): Monitor0: Using default hsync range of 43.27-69.85 kHz
(II) NV(0): Monitor0: Using default vrefresh range of 60.02-85.01 Hz
(II) NV(0): Clock range:  12.00 to 350.00 MHz
[snip](**) NV(0): *Default mode "1024x768": 94.5 MHz, 68.7 kHz, 85.0 Hz
(II) NV(0): Modeline "1024x768"   94.50  1024 1072 1168 1376  768 769
772 808 +hsync +vsync
(**) NV(0): *Default mode "800x600": 56.3 MHz, 53.7 kHz, 85.1 Hz
(II) NV(0): Modeline "800x600"   56.30  800 832 896 1048  600 601 604
631 +hsync +vsync
(**) NV(0):  Default mode "1024x768": 78.8 MHz, 60.1 kHz, 75.1 Hz
(II) NV(0): Modeline "1024x768"   78.80  1024 1040 1136 1312  768 769
772 800 +hsync +vsync
(**) NV(0):  Default mode "1024x768": 75.0 MHz, 56.5 kHz, 70.1 Hz
(II) NV(0): Modeline "1024x768"   75.00  1024 1048 1184 1328  768 771
777 806 -hsync -vsync
(**) NV(0):  Default mode "1024x768": 65.0 MHz, 48.4 kHz, 60.0 Hz
(II) NV(0): Modeline "1024x768"   65.00  1024 1048 1184 1344  768 771
777 806 -hsync -vsync
(**) NV(0):  Default mode "832x624": 57.3 MHz, 49.7 kHz, 74.6 Hz

[remainder snipped]
In your Xorg conf just put in the resolution you want and X will
usually figure out which sync rates to use. Or copy the modelines you
find in your Xorg.0.log file.
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