R
Robin Walker [MVP]
This problem is observed with a Matrox Millenium G550 but
might be of more general applicability.
The video card can support two monitors, one VGA, the
other DVI. It has the following properties, which
apparently cannot be changed:
1. If the DVI device is connected, it becomes display 1,
and the VGA device becomes display 2.
2. If the DVI device is not connected, the VGA device
becomes display 1.
In our application, the DVI connection is for a Barco
projector, and the operator's console is on the VGA
connection. Thus Windows had to be configured so that
the Windows primary display is display 2 (the VGA device).
The difficulty arises if the connection to the Barco is
not present: the video card now makes the VGA device into
monitor 1. Windows boots up normally, but the VGA screen
(now display 1 instead of display 2) remains blank, and
does not display the logon screen - presumably because
Windows is trying to put the logon screen on display 2,
which is not present. Because we cannot get past the
logon process, we cannot change the video settings to
make the VGA display the primary display again. In fact,
the PC becomes unusable, and we are locked out of Windows.
What we need is some keyboard shortcut that will work
before login, that can cause Windows to toggle its
primary display setting. Any ideas?
might be of more general applicability.
The video card can support two monitors, one VGA, the
other DVI. It has the following properties, which
apparently cannot be changed:
1. If the DVI device is connected, it becomes display 1,
and the VGA device becomes display 2.
2. If the DVI device is not connected, the VGA device
becomes display 1.
In our application, the DVI connection is for a Barco
projector, and the operator's console is on the VGA
connection. Thus Windows had to be configured so that
the Windows primary display is display 2 (the VGA device).
The difficulty arises if the connection to the Barco is
not present: the video card now makes the VGA device into
monitor 1. Windows boots up normally, but the VGA screen
(now display 1 instead of display 2) remains blank, and
does not display the logon screen - presumably because
Windows is trying to put the logon screen on display 2,
which is not present. Because we cannot get past the
logon process, we cannot change the video settings to
make the VGA display the primary display again. In fact,
the PC becomes unusable, and we are locked out of Windows.
What we need is some keyboard shortcut that will work
before login, that can cause Windows to toggle its
primary display setting. Any ideas?