Thanks for the suggestion.

Unfortunately it doesn't seem to have had any effect. :(

Regards,
Glenn Alexander
Technical Officer
Digital Media Centre

From: Another Sillyname [mailto:anothersn...@googlemail.com]
Sent: Thursday, 11 April 2013 6:05 PM
To: Glenn Alexander
Subject: Re: Having troublh working out how to STOP monitor detection.

Hi
You probably need a variation on something like this....
Section "Screen"
    Identifier     "CRT-0"
    Device         "Videocard0"
    Monitor        "Headless"
    DefaultDepth    24
    Option         "ConnectedMonitor" "CRT-0"
    Option         "UseEDID" "FALSE"      <--------------------
    Option         "IgnoreEDID" "TRUE"     <--------------------
    Option         "NoDDC" "TRUE"       <---------------------
    SubSection     "Display"
        Depth       24
        Modes      "nvidia-auto-select"
    EndSubSection
EndSection


I can't remember which one monitors power events of the top of my head and am 
just heading out to a meeting......
It should give you a starting point though....I run numerous machines headless 
but sharing a monitor when required using the above xorg.conf settings.

On 11 April 2013 04:01, Glenn Alexander 
<galex...@uow.edu.au<mailto:galex...@uow.edu.au>> wrote:
Hi list users,

I have a Linux box (AMD-64, Debian Stable, fglrx) set up for digital signage 
driving 2 full-HD monitors via DisplayPort (and a control screen on an old XGA 
LCD in the closet). The signage monitors are internally configured to shut 
themselves down overnight and restart themselves each weekday morning. This 
plays merry havoc with the content as X11 and/or the window manager  (kWin) 
tries to shuffle things around to fit on remaining monitors. End result is the 
control monitor (which doesn't shut down) ends up with everything on it the 
next day.

I am having trouble working out how to disable the automatic monitor detection 
so that X11 just carries on as if the monitors are still there while they are 
shut down  for the night/weekend. Basically I want to completely ignore all 
monitor power events.

Hunting around the 'net has given me tantalising hints that DPMS or udev may be 
involved but since everyone else in the world seems to want the exact opposite 
of what I want* (ie, to have automatic P&P) I am having little joy finding a 
solution :(

*...well... plenty of Windows7 users complaining about not being able to change 
channels on a HDTV being used as a secondary monitor without scrambling their 
desktops, while MS ignores them, but that is even less help. :)


FYI: my xorg.conf presently looks like:

Section "ServerLayout"
                Identifier     "amdcccle Layout"
                Screen      0  "MainScreen" 0 0
EndSection

Section "Monitor"
                Identifier   "0-DFP1"
                Option      "VendorName" "ATI Proprietary Driver"
                Option      "ModelName" ""
                Option      "DPMS" "false"
                Option      "PreferredMode" "1920x1080"
                Option      "TargetRefresh" "60"
                Option      "Position" "1920 0"
                Option      "Rotate" "normal"
                Option      "Disable" "false"
EndSection

Section "Monitor"
                Identifier   "0-DFP2"
                Option      "VendorName" "ATI Proprietary Driver"
                Option      "ModelName" ""
                Option      "DPMS" "false"
                Option      "PreferredMode" "1920x1080"
                Option      "TargetRefresh" "60"
                Option      "Position" "0 0"
                Option      "Rotate" "normal"
                Option      "Disable" "false"
EndSection

Section "Monitor"
                Identifier   "0-CRT1"
                Option      "VendorName" "ATI Proprietary Driver"
                Option      "ModelName" ""
                Option      "DPMS" "false"
                Option      "PreferredMode" "1024x768"
                Option      "TargetRefresh" "60"
                Option      "Position" "1376 1080"
                Option      "Rotate" "normal"
                Option      "Disable" "false"
EndSection

Section "Device"
                Identifier  "card-0"
                Driver      "fglrx"
                Option      "Monitor-DFP1" "0-DFP1"
                Option      "Monitor-DFP2" "0-DFP2"
                Option      "Monitor-CRT1" "0-CRT1"
                BusID       "PCI:1:0:0"
EndSection

Section "Screen"
                Identifier "MainScreen"
                Device     "card-0"
                DefaultDepth     24
                SubSection "Display"
                                Viewport   0 0
                                Virtual   3840 1920
                                Depth     24
                EndSubSection
EndSection




Regards,
Glenn Alexander
Technical Officer
Digital Media Centre
Faculty of Creative Arts
232.G11b Mike Codd Building, Innovation Campus
University of Wollongong NSW 2522
T   + 61 2 4221 5847<tel:%2B%2061%202%204221%205847>
W  
http://www.uow.edu.au/crearts/digitalmediacentre/<http://www.uow.edu.au/crearts/digitalmediacentre/index.html>
w   www.glenalec.net/DMCTO/<http://www.glenalec.net/DMCTO/>
Tw twitter.com/DMC_TO<http://twitter.com/DMC_TO>
Work Days: M-F 9am-4pm


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