2 monitors installed ?

  • Thread starter Thread starter Thomas Johansen
  • Start date Start date
T

Thomas Johansen

Hi

In the device manger I have 2 default monitor installed. If I uninstall one
of them and reboot, it's installed again.

Why do I have 2 monitors in my device manger (I only have 1 monitor
attached. There is just 1 VGA connector) ??

How can I remove 1 of them, so it does not have 2 monitors ?

The graphics controller is a LynxEM+ from Silicon Motion.
The XPe image uses WInlogon, terminal services etc. It's actually close to a
XP Pro !!!

Thomas
 
Thomas,

Some additional information might help.

Is the LynxEM+ the only graphics adapter -- i.e. is it the onboard
graphics adapter? is it an add-in card replacing an onboard solution?

Roy
 
Thomas,

Is it possible that the board has an LVDS interface in addition to the VGA?
If so sometimes the BIOS will have a Flat Panel only, VGA only, or both. If
this is an option on the board see if "both" is set in the BIOS. (You can
set VGA only safely. If you set LVDS only and save you won't have any
display!)

HTH,
Brad
 
Is the LynxEM+ the only graphics adapter -- i.e. is it the onboard
graphics adapter? is it an add-in card replacing an onboard solution?
Click to expand...

It's onboard and the only one. Its the SM712 and support primary display and
secondary display. ??

So is WinXPe detecting 2 dispaly supported bu the controller ? There is only
one VGA out on the platform !!
 
Is it possible that the board has an LVDS interface in addition to the VGA?
If so sometimes the BIOS will have a Flat Panel only, VGA only, or both. If
this is an option on the board see if "both" is set in the BIOS. (You can
set VGA only safely. If you set LVDS only and save you won't have any
display!)
Click to expand...

Yes... I think so. The SM712 support a primary display and a secondary
display. So I guess, that WinXPe detects the secondary display allso.

The platform does only have 1 VGA out, so the other i not used.

Is there any way of forcing windows just to use one. ? Could be a problem,
when WinXPe suddenly whants to use the second display to show the desktop.
 
Thomas,

I had a similar need when we had to add a PCI graphics card onto a (BCM
FX815ELT) motherboard with Intel 815 graphics onboard. The BIOS would
not allow us to disable the onboard graphics so we did it by capturing
the registry entries created when telling Windows to not extend the
desktop to the secondary graphics adapter. Here's the reg file as a
sample that might be helpful:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Hardware
Profiles\Current\System\CurrentControlSet\Services\I81X\DEVICE0]
"Attach.ToDesktop"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Hardware
Profiles\Current\System\CurrentControlSet\Services\I81X\DEVICE0\Mon80861000]
"Attach.ToDesktop"=dword:00000000

HTH, Roy
 
Not being familiar with chipset too much, I would ask probably obvious
questions like:

1. is there a DVI port as well as a VGA port?
2. is there a TV out on this unit?
3. does the chip by default have support for TV out or DVI, even though the
OEM did not spin the ports on?

Just a couple... windows will pick up a secondary device if either of these
conditions exist. (DVI+VGA, or VGA+TV out)

Sorry if these are too obvious. just throwing ideas.

JC
 
Back
Top