[ddccontrol-users] ddccontrol samsung syncmaster 910mp vga

[<qui...@ba...>]

Monitor manual says it support DDC for VESA VGA but I think I can't set monitor attributes with DDC, only retrieve.

What is the differences between DDC to read and to set?

User manual (20M) speak of DCC at page 47:
"Plug & Play: This is a function that provides the best quality screen for the user by allowing the computer and the monitor to exchange information automatically. This monitor follows the international standard VESA DDC for the Plug & Play function."
http://downloadcenter.samsung.com/content/UM/200501/20050126134514656_BN59-00390N-01EnP.pdf 

Many thanks,
Antonio Bardazzi

This is my system:

# LANG= LC_ALL= ddccontrol -p -c -d
ddccontrol version 0.4.2
Copyright 2004-2005 Oleg I. Vdovikin (ol...@cs...)
Copyright 2004-2006 Nicolas Boichat (ni...@bo...)
This program comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of this program under the terms of the GNU General Public License.

Probing for available monitors.I/O warning : failed to load external entity "/usr/share/ddccontrol-db/monitor/SAM0187.xml"
Document not parsed successfully.
......I/O warning : failed to load external entity "/usr/share/ddccontrol-db/monitor/SAM0187.xml"
Document not parsed successfully.
.
Detected monitors :
 - Device: pci:03:00.0-1
   DDC/CI supported: No
   Monitor Name: VESA standard monitor
   Input type: Analog
 - Device: dev:/dev/i2c-2
   DDC/CI supported: No
   Monitor Name: VESA standard monitor
   Input type: Analog
No monitor supporting DDC/CI available.
If your graphics card need it, please check all the required kernel modules are loaded (i2c-dev, and your framebuffer driver).

# ddcprobe 
VESA 3.0 detected.
OEM Name: NVIDIA
Vendor Name: NVIDIA Corporation
Product Name: G73 Board - p295h2
Product Revision: Chip Rev
Memory installed = 4096 * 64k blocks = 262144kb
Supported standard modes:
        640x400x256
        640x480x256
        800x600x16
        800x600x256
        1024x768x16
        1024x768x256
        1280x1024x16
        1280x1024x256
        320x200x64k
        320x200x16m
        640x480x64k
        640x480x16m
        800x600x64k
        800x600x16m
        1024x768x64k
        1024x768x16m
        1280x1024x64k
        1280x1024x16m
EDID ver. 1 rev. 3.
Manufacturer: SAM
ID: 0187
EISA ID: SAM0187
Serial number: 4d5a3139.
Manufactured in week 29 of 2006.
Input signal type: analog signal.
Screen size max 34 cm horizontal, 27 cm vertical.
Gamma: 2.200000.
DPMS flags: RGB, active off, no suspend, no standby.
Established timings:
        720x400 @ 70 Hz (VGA 640x400, IBM)
        720x400 @ 88 Hz (XGA2)
        640x480 @ 60 Hz (VGA)
        640x480 @ 67 Hz (Mac II, Apple)
        640x480 @ 72 Hz (VESA)
        640x480 @ 75 Hz (VESA)
        800x600 @ 60 Hz (VESA)
        800x600 @ 72 Hz (VESA)
        800x600 @ 75 Hz (VESA)
        832x624 @ 75 Hz (Mac II)
        1024x768 @ 87 Hz Interlaced (8514A)
        1024x768 @ 70 Hz (VESA)
        1024x768 @ 75 Hz (VESA)
        1280x1024 @ 75 Hz (VESA)
Standard timing 0: 60 Hz, 1280x1024
Standard timing 1: 75 Hz, 1152x864
Detailed timing 0:
        Pixel clock: 108000000
        Horizontal active time (pixel width): 256
        Horizontal blank time (pixel width): 1432
        Vertical active time (pixel height): 0
        Vertical blank time (pixel height): 1066
        Horizontal sync offset: 48
        Horizontal sync pulse width: 112

# get-edid | parse-edid
parse-edid: parse-edid version 1.4.1
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 300
        VBE string at 0x11110 "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

# lsmod 
Module                  Size  Used by
i2c_dev                 8580  0 
snd_seq_oss            27264  0 
snd_seq_midi_event      6464  1 snd_seq_oss
snd_seq                41744  4 snd_seq_oss,snd_seq_midi_event
snd_seq_device          7500  2 snd_seq_oss,snd_seq
nvidia               7093636  34 
parport_pc             28452  0 
snd_intel8x0           29468  5 
parport                34376  1 parport_pc
snd_ac97_codec         82528  1 snd_intel8x0
i2c_nforce2             6656  0 
agpgart                29040  1 nvidia
snd_ac97_bus            2048  1 snd_ac97_codec

# lspci 
00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2)
00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)
00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)
00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)
00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)
00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)
00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:04.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a2)
00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a2)
00:0a.2 RAM memory: nVidia Corporation MCP51 Memory Controller 0 (rev a2)
00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a2)
00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a2)
00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1)
00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
00:10.2 Multimedia audio controller: nVidia Corporation MCP51 AC97 Audio Controller (rev a2)
00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a1)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
03:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce 7600 GS] (rev a1)

# uname -r
2.6.18-028stab053