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windows 8.1 dual monitor detection issue

Tags:
  • Dual Monitors
  • Computers
  • Detection
  • Windows 8
  • Graphics
  • Monitors
Last response: in Graphics & Displays
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November 22, 2013 2:16:55 AM

I have two monitors and only one of them is being detected by my computer. I have 1 18" lg (not being detected) and 1 24" SILO. I had two monitors working before updated to windows 8.1 from 8. Also I cannot get the right resolution for my SILO

More about : windows dual monitor detection issue

a b * Windows 8
a b C Monitor
November 22, 2013 2:26:48 AM

Sounds like you have to install / reinstall the graphics card driver.
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November 28, 2013 11:01:01 AM

I have the same issue as Faestaris. And nothing help's.
My dual monitor is black after updatet to 8.1.
I has tryed to deinstall and install the amd driver software or under safe mode deinstall the windows default driver. Really nothing happens.
I think the problem is Windows and not the graphic driver. Because a other BenQ Monitor is also black when i plugged via DVI.

Here some infos about my system:
-- OS
Windows 8.1 Pro (since last week updated)
-- Graphic Card
AMD Radeon HD 7900 (lastest AMD 13.11 Beta 9.4 installed)
The new graphics driver of amd are ready to download under http://support.amd.com/en-us/kb-articles/Pages/latest-c... but it's not solved my "black screen problem".
-- Monitors
22" Samsung Syncmaster 2233BW (primary)
19" BenQ FP937s (second)

The actual state that the 19" monitor get signal (the led near the powerbutton lighs green) but the whole display is black.
Both monitors are plugged by DVI cables. With VGA cable is'nt possible to detect the 2nd monitor.

Under Device-Manager is the second monitor called "PnP-Monitor Standard" and in the resolution manager of windows they called by name "BenQ FP937s" also in Catalyst Control Center.

If i reanimate my monitor. BenQ logo shows - fade out - desktop appear (low brightness but seeing task and background-image) and after 2 seconds its complete black.

Has someone the same problem and has a solution?

offical amd forum post: http://forums.amd.com/game/messageview.cfm?catid=454&threadid=169703&enterthread=y
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February 17, 2014 9:16:51 PM

Willy Fetzig said:
I have the same issue as Faestaris. And nothing help's.
My dual monitor is black after updatet to 8.1.
I has tryed to deinstall and install the amd driver software or under safe mode deinstall the windows default driver. Really nothing happens.
I think the problem is Windows and not the graphic driver. Because a other BenQ Monitor is also black when i plugged via DVI.

Here some infos about my system:
-- OS
Windows 8.1 Pro (since last week updated)
-- Graphic Card
AMD Radeon HD 7900 (lastest AMD 13.11 Beta 9.4 installed)
The new graphics driver of amd are ready to download under http://support.amd.com/en-us/kb-articles/Pages/latest-c... but it's not solved my "black screen problem".
-- Monitors
22" Samsung Syncmaster 2233BW (primary)
19" BenQ FP937s (second)

The actual state that the 19" monitor get signal (the led near the powerbutton lighs green) but the whole display is black.
Both monitors are plugged by DVI cables. With VGA cable is'nt possible to detect the 2nd monitor.

Under Device-Manager is the second monitor called "PnP-Monitor Standard" and in the resolution manager of windows they called by name "BenQ FP937s" also in Catalyst Control Center.

If i reanimate my monitor. BenQ logo shows - fade out - desktop appear (low brightness but seeing task and background-image) and after 2 seconds its complete black.

Has someone the same problem and has a solution?

offical amd forum post: http://forums.amd.com/game/messageview.cfm?catid=454&threadid=169703&enterthread=y


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February 17, 2014 9:18:10 PM

Hi - I just upgraded to 8.1 and my monitors are black. Were you able to get yours working?

Thanks
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April 15, 2014 3:41:39 PM

I've had this same issue happen after an update (windows 8.1 update 1).

I believe the problem was related to the caching windows 8 does to enable the hybrid shutdown/startup capability.

I fixed the issue by doing a full reboot by executing the following command in the command prompt
shutdown -S -F -T 20 -C "Shutting down in 20 seconds"

Hope this helps someone else
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September 1, 2014 6:25:09 AM

tk421_tk421 said:
I've had this same issue happen after an update (windows 8.1 update 1).

I believe the problem was related to the caching windows 8 does to enable the hybrid shutdown/startup capability.

I fixed the issue by doing a full reboot by executing the following command in the command prompt
shutdown -S -F -T 20 -C "Shutting down in 20 seconds"

Hope this helps someone else


can u explain a little more coz i dont understand what u just said .. may be step by step will help..
i m having same problem.. trying to setup 2 monitor for the first time and windows isnt detecting my 2nd monitor
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less than a minute ago

hello all .. I'm posting what worked for me to fix my monitor issue after upgrading to windows 8.1

I have a 2012 Toshiba laptop/notebook with an AMD Radeon Graphics card and AMD processor. Prior to upgrading to 8.1 I had no problems plugging in my VGA cable and duplicating or extending to a monitor. I could use any of 3 different monitors I have .. an LG HD Flatron, DELL flatscreen and a Phillips flatscreen.

I tried for days upgrading AMD Catalyst drivers, window 8.1 driver/update, considered reverting back to Win 8 .. and many of the forums seemed very helpful .. and one hinted at VGA incompatibility (thank you because this got me thinking in the right direction) but nothing worked no matter what monitor I used it remained black even though it seemed that Windows recognized there was a monitor there.

Short answer .. I got a $40 HDMI to VGA adaptor (because the monitor I want to use, the LG, doesn't have an HDMI port) and it worked. There was one small gliche in that the monitor would flash black every 30 seconds. I fixed this by changing the Monitor driver from an Analog based driver to a Digital based driver that just happen to come with the monitor software.

I hope this helps anyone else who having these sort of problems.

I was very disappointed that neither AMD nor Microsoft posted this as possible solution on their support sites.
Cheers !

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