acer v173 works with ddccontrol

interestingly, if I drag the gddccontrol window to the other monitor, it will switch to controlling the monitor that it isn't currently on.

but when I invoke ddccontrol to specify a specific i2c device, I learned I have to use dev: in front of it like this: "dev:/dev/i2c-1"

so for my acer v173:


sudo ddccontrol -c -d /dev/i2c-1
ddccontrol version 0.4.2

Reading EDID and initializing DDC/CI at bus /dev/i2c-1...
Invalid filename (/dev/i2c-1).

DDC/CI at /dev/i2c-1 is unusable (-3).
If your graphics card need it, please check all the required kernel modules are loaded (i2c-dev, and your framebuffer driver).

===================================================

it doesn't like the device name:

but if I use the dev: syntax, no problemo

sudo ddccontrol  -c -d dev:/dev/i2c-1

ddccontrol version 0.4.2
Copyright 2004-2005 Oleg I. Vdovikin (oleg@cs.msu.su)
Copyright 2004-2006 Nicolas Boichat (nicolas@boichat.ch)
This program comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of this program under the terms of the GNU General Public License.

Reading EDID and initializing DDC/CI at bus dev:/dev/i2c-1...
I/O warning : failed to load external entity "/usr/share/ddccontrol-db/monitor/ACR0019.xml"
Document not parsed successfully.

EDID readings:
 Plug and Play ID: ACR0019 [VESA standard monitor]
 Input type: Analog
=============================== WARNING ===============================
There is no support for your monitor in the database, but ddccontrol is
using a basic generic profile. Many controls will not be supported, and
some controls may not work as expected.
Please update ddccontrol-db, or, if you are already using the latest
version, please send the output of the following command to
ddccontrol-users@lists.sourceforge.net:

LANG= LC_ALL= ddccontrol -p -c -d

Thank you.
=============================== WARNING ===============================

Capabilities:
Raw output: (prot(monitor)type(LCD)model(V173)cmds(01 02 03 07 0C E3 F3)vcp(04 05 06 08 0E 10 12 14(05 08 0B) 16 18 1A 1E 20 30 3E AC AE B2 B6 C6 C8 C9 DF )mswhql(1)asset_eep(40)mccs_ver(2.0))
Parsed output: 
 VCP: 04 05 06 08 0e 10 12 14 16 18 1a 1e 20 30 3e ac ae b2 b6 c6 c8 c9 df 
 Type: Unknown

Controls (valid/current/max) [Description - Value name]:
Control 0x02: +/1/2   [???]
Control 0x04: +/0/1 C [Restore Factory Defaults]
Control 0x05: +/0/1 C [Restore Brightness and Contrast]
Control 0x06: +/0/1 C [Restore Factory Default Geometry]
Control 0x08: +/0/1 C [Restore Factory Default Color]
Control 0x0b: +/100/0   [???]
Control 0x0c: +/35/63   [???]
Control 0x0e: +/50/100 C [Image Lock Coarse (Clock)]
Control 0x10: +/62/100 C [Brightness]
Control 0x12: +/56/100 C [Contrast]
Control 0x14: +/5/11 C [???]
Control 0x16: +/80/100 C [Red maximum level]
Control 0x18: +/80/100 C [Green maximum level]
Control 0x1a: +/80/100 C [Blue maximum level]
Control 0x1e: +/0/1 C [Automatically adjust]
Control 0x1f: +/1/1   [???]
Control 0x20: +/50/100 C [Horizontal Position]
Control 0x30: +/34/62 C [Vertical Position]
Invalid response, corrupted data - xor is 0xa9, length 0x08
6e 88 02 01 31 31 00 00 3e 00 22                | n...11..>."     
Control 0x3e: +/54/63 C [Image Lock Fine (Clock Phase)]
Control 0x52: +/255/65535   [???]
Control 0x60: +/1/1   [???]
Control 0x6c: +/50/100   [???]
Control 0x6e: +/50/100   [???]
Control 0x70: +/50/100   [???]
Invalid response, length is 9, should be 8 at most
Invalid response, length is 9, should be 8 at most
Invalid response, length is 9, should be 8 at most
Control 0xac: +/64200/0 C [???]
Control 0xae: +/6030/65535 C [???]
Control 0xb2: +/1/1 C [???]
Control 0xb6: +/3/5 C [???]
Control 0xc0: +/42654/65535   [???]
Control 0xc6: +/120/255 C [???]
Control 0xc8: +/9/0 C [???]
Control 0xc9: +/2/65535 C [???]
Control 0xca: +/1/2   [???]
Control 0xcc: +/2/7   [???]
Control 0xd6: +/1/4   [???]
Control 0xdf: +/512/65535 C [???]