Monitor not recognized after SP1 upgrade

[Tomb]

I have a nasty problem with my monitor not being detected after the SP1
upgrade.
During the upgrade, the New Device Was found dialog came up and started
looking for my monitor (Sony GDM-W900). It couldn't find it so I told it
"Don't ask me again"
Well, everything seemed OK until I tried to assign a profile to the monitor.
The monitor was not present in the Color management settings.

So, I went to the device manager and in there there was no monitor installed
at all. I tried scan for new hardware and the monitor still didn't appear. I
turned off the monitor and turned it on and scanned for new devices and still
it did not show up.

I then plugged in another monitor and it found it and installed it properly.
Plugging the original monitor back in, results in No monitor in the device
manager.

If I select Scan for new hardware but not click it, and then turn off my
monitor and then click the button, It detects hardware. If I then turn on my
monitor, a monitor is in the Device Manager and it is a Generic Non Plug and
Play monitor.
This works, but at the next boot up, it goes back to seeing no monitor.

Thus, having once told Vista "Don't ask again" it now never recognises that
my monitor is plugged in (actually it probably does but does nothing).

I know there are drivers available for my monitor. If I enablwe the display
of old devices in the device manager I can update my GDM W900 driver from the
internet with no problems.

How do I get Vista to recognize that my monitor is plugged in now?
Ot alternatively, how do I get Vista to ask my again for my monitor?????

I, have been with Vista since RC1 days, and this is the first real problem
that I cannot get resolved.

Using Vista Ultimate X64 edition.

Thanks

 

[IkidUnot]

If you delete the monitor in device manager, the next time it sees that
there's new hardware, can't you select it from a list? I presume the
information file must be on your system...

 

[Tomb]

As mentioned in the first message, there is NO monitor listed. I cannot get
it to show up in device manager at all.
I even rolled back to vista without the service pack and it weas broken then
as well.
The only fixin is to reformat and reinstall (at least so far)

 

[Spirit]

BOOT into Safe Mode - Device Manager - DELETE ALL monitors.
Exit and power off. Hookup ONLY the monitor that is not found as
the primary. Reboot and let Windows Find it. REBOOT again to be
sure that windows still finds it.

Now power off and hook the monitors up the way you want and
reboot and let it find the new primary monitor.

 

[Quaoar]

I have a nasty problem with my monitor not being detected after the SP1
upgrade.
During the upgrade, the New Device Was found dialog came up and started
looking for my monitor (Sony GDM-W900). It couldn't find it so I told it
"Don't ask me again"
Well, everything seemed OK until I tried to assign a profile to the monitor.
The monitor was not present in the Color management settings.

So, I went to the device manager and in there there was no monitor installed
at all. I tried scan for new hardware and the monitor still didn't appear. I
turned off the monitor and turned it on and scanned for new devices and still
it did not show up.

I then plugged in another monitor and it found it and installed it properly.
Plugging the original monitor back in, results in No monitor in the device
manager.

If I select Scan for new hardware but not click it, and then turn off my
monitor and then click the button, It detects hardware. If I then turn on my
monitor, a monitor is in the Device Manager and it is a Generic Non Plug and
Play monitor.
This works, but at the next boot up, it goes back to seeing no monitor.

Thus, having once told Vista "Don't ask again" it now never recognises that
my monitor is plugged in (actually it probably does but does nothing).

I know there are drivers available for my monitor. If I enablwe the display
of old devices in the device manager I can update my GDM W900 driver from the
internet with no problems.

How do I get Vista to recognize that my monitor is plugged in now?
Ot alternatively, how do I get Vista to ask my again for my monitor?????

I, have been with Vista since RC1 days, and this is the first real problem
that I cannot get resolved.

Using Vista Ultimate X64 edition.

Thanks

You might have a look at this Registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\DevicePath

There are forum references to Vista not having the path
;%SystemRoot%\System32 that causes these type of hardware identification
failures.

Q