Question ATI Radeon 5450 PCIe not working extended display

[johnny_chronic]

Hi! I have a Radeon 5450 PCIe card that has DVI-I and VGA inputs. I used my old VGA to DVI-I adapter from last decade. I get a duplicate image on the second monitor but the second monitor is not found when I try to detect the displays.
I have tried uninstalling video drivers using DDU and reinstalling the latest versions. I uninstalled and reinstalled both the video card and the monitor. I tried to single link the (working) monitor and I get, "Unknown monitor."
After reconnecting the 1st monitor, that monitor disappears. They are both Dell monitors, both built around the same time. Please help.

UPDATE
I removed the other monitor and I have unknown monitor. I checked ATI catalyst and found out this is an analogue CRT somehow.

 

[Grobe]

Ok so you have in a short period in time actually had it working (image on both displays) ?

 

[johnny_chronic]

Yes.
There is an image on both displays but duplicated, there is only one monitor showing up in windows and inside the ATI catalyst program.

 

[Grobe]

Have you poked around in the ATI settings, and have you seen any options about extended desktop?

Tried to reinstall ATI drivers ? Tried to install older driver?

 

[johnny_chronic]

Tried all of that to no avail.
I used device manager to uninstall and reinstall, including disable and renable the video card.
and used DDU to flush the old graphics card settings after uninstalling (for both).
I can't remember if I only had one monitor or not in device manager before the switch but at this time
there is one monitor in device manager.

 

[Grobe]

Ok - then try this - just for ensuring the GPU card itself are capable of outputing two different images simoultaneously - Go get a Linux Live-CD (Ubuntu or Mint are good choices), Boot your computer from the live-cd and then find the display settings (on Linux Lite it's just named Settings --> display).

 

[johnny_chronic]

I will try that and let you know.