Dual Monitor - second monitor goes into power saving mode

mercia

mercia

mercia

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30 Jun 2010
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14
Hi all, hope this is in the right section.

Just built new pc, cheers for help on here, very happy with it! but...i have the weirdest issue and i needs help!

I have a Radeon 5700XT, 34" main monitor and 24" second monitor

Both monitors work perfectly, but only when one is plugged in. If i have both plugged in one goes black screen (power saving mode) even though its showed the startup screen, it seems to be once its got to windows. The screen is there as you can move the mouse over to it, even dragging open windows to and from it.

Main screen is plugged in using hdmi
second monitor is plugged in using display port
Both on the graphics card
Both monitors have the correct drivers and are displayed in AMD software and in windows
Even though pressing detect it says cant detect another monitor, it shows both
I cant seem to switch the 24" monitor from 1 to 2 in windows for some reason, even though i have set the main monitor as the 34" it still shows as number 2

If i only plug one monitor in it works, this is the case for both monitors

Everything 'seems' to be right but this second monitor going into power saving mode once in windows

Never had an issue before but as i say its a new system, please help
 
the small 24" one, not the one i want as main. i cant swap them as the 24" only has hdmi and no display port

Would hdmi override display port by any chance or vice versa, i could connect both via hdmi

Its as if plugging one is stops the other working?
 
so you currently have it configured like this:
24" HDMI Set as main display
34" DisplayPort Set as secondary display

when both are plugged in the 34" enters power saving.
both work fine when only one connected?

Sorry just want to clarify the issue

The GPU should send a signal to all connected displays.
What is the full make and model of the GPU?
Full system specs could be useful too.
 
Ok what PSU and motherboard do you have?

Have you tried re seating everything? take the GPU out and put it back in, remove power cables and plug them back in?
 
Yeah its not something i have heard of before but i know that having a connector slightly loose can cause all sorts of weird issues.

If that does not work then i would suggest contacting OCUK (if this is where you bought the GPU from) and see if they have any ideas.
 
still cant get this working, i've bought new cables, reinstalled everything, updated drivers.

I have emailed overclockers but i still feel its something i am missing

anyone else had a similar issue?
 
mercia said:
still cant get this working, i've bought new cables, reinstalled everything, updated drivers.

I have emailed overclockers but i still feel its something i am missing

anyone else had a similar issue?
Click to expand...

I had a few issues setting up my second screen. Was using two different methods, had to use both HDMI to get it working.

Do both monitors have HDMI or do both have DP? What ports are on your graphics card?
 
main monitor has every port possible but the older dell has displayport/dvi

card has 3 x displayport and 1 x hdmi

i uninstalled the graphics drivers today and just had the older dell plugged in, all working fine and then i installed the amd graphics driver and the screen went black and in to power saving mode again. You think the monitor has an issue with the card/graphics software?

i really dont want to buy another monitor if this wont fix it, if it does then fantastic but not wasting money on another monitor to test this
 
mercia said:
main monitor has every port possible but the older dell has displayport/dvi

card has 3 x displayport and 1 x hdmi

i uninstalled the graphics drivers today and just had the older dell plugged in, all working fine and then i installed the amd graphics driver and the screen went black and in to power saving mode again. You think the monitor has an issue with the card/graphics software?

i really dont want to buy another monitor if this wont fix it, if it does then fantastic but not wasting money on another monitor to test this
Click to expand...

Are they both connected to display port or differently?

Have you tried daisy chaining them?
 
I have seen something similar on my RTX 2080 Ti after playing certain games. It would disable two of my three monitors (all Displayport). I had to go into Display settings - not Nvidia Control Panel - and re-enable them.
 
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