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ryzen87
Adept I

APU A10-7890K + ASUS A88X-PRO problem with dual monitor

I assembled a PC with APU A10-7890K and ASUS A88X-PRO motherboard, without a dedicated video card.

The OS is WIN 10 Pro 64 bit (updated) and the BIOS is the last version.

The AMD drivers are updated to the last version also.

I have a monitor (not full HD) connected to the DVI socket on the motherboard that works properly.

A few meters away I have a LG TV, a 37-inch full-HD with HDMI inputs.
When I plug the cable into the HDMI on the motherboard and then into one of the HDMI on the TV, the monitor in DVI goes black and the signal goes to the TV.

The image on the TV, however, is not correctly resized, but it bursts a bit.

If I try to start a video on youtube, the audio via the HDMI is not heard, even if the Digital Display Audio (AMD High Definition Audio Device) appears in the list, but not connected.

If I then try to reveal the device manually, the sound is heard. (but always manually).

At this point if I decide then to disconnect the HDMI from the TV to go back to work on the monitor, the video signal on the monitor is different.

There is a halo / fuchsia halo in full screen and the resolution on the monitor has changed.

Also in this case if I do "IDENTIFY" manually from "Screen Settings", the signal on the monitor will return to normal.

With the monitor connected at the same time with the TV, on the Radeon settings, I do not clone screens or extend them etc ...
So I can not do the "Dual Monitor", in addition to the problems mentioned above.

---

What I wrote above was the situation of last week.

Now, after several tweaks, I managed to make sure that the audio when connecting the TV always works (apparently) and the resolution fits the TV panel.
Problem solved in part ...
Now what remains to fix is ​​this:

to TV connected in HDMI, if I turn off the TV, the video signal does not return to the PC monitor, everything remains off, instead if I change the TV signal from HDMI to "Antenna", then the signal returns to the monitor, or if I unplug the HDMI cable from one of the TV ports.
Already this is strange, I expected an adaptation of the signal ... but no.
Every time I have to click with the right mouse button on the Desktop and go to "Screen Settings" and always press the "Detect" button.
In this way the monitor signal is set up.

Is it possible to have all these problems to use a monitor and a TV?
Is it not possible to manage 2 monitors at the same time with APU A10-7890k?

Thanks.

(sorry for my english)

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10 Replies
benman2785
Big Boss

first of all pls read: A88X-Pro + A10 7890K + Win10 - Triple/Dual Monitor Issue - Motherboards

it looks like its an ASUS problem - maybe update your BIOS

but if its ok if ONLY the TV works you need to resize your windows screen-resolution to that of the TV - then if neccessary enable/disable correct OverScan

- if sound is still not working try a different HDMI-cable (maybe a shorter one or with better cable-shield)

also try to uninstall driver with DDU
then install latest fitting APU Driver

PC: R7 2700X @PBO + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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Thanks !

(bios installed is the last version, for this motherboard https://www.asus.com/it/Motherboards/A88XPRO/HelpDesk_BIOS/. Right ?)

I'll make a try.

yeah - but as i stated in my link, it is possible that it still wont work with more then one screen/tv - because maybe ASUS did a bad job

so you can try, but if it didnt work you may need a different MoBo

PC: R7 2700X @PBO + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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Good morning, at this link https://www.asus.com/it/Motherboards/A88XPRO/ asus has declared about this motherboard that support multi-monitor.

3_Display.jpg

So it have to function ! Maybe with a correct driver...

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ok

save all your data

format system-drive
install win10install missing chipset driver
install latest APU driver

test again

also have in mind - maybe one of your cables is broken
also pls boot while booth screens are connected

and do you want to show the same output on your TV as on your Screen or should they output different?

PC: R7 2700X @PBO + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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Yes! Both of them.

For the moment...last question: are there some parameters to check for all video signal outputs in the BIOS ?

I don't remember...

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maybe there is a option what output to use - set it to auto (or if available multi/all)

PC: R7 2700X @PBO + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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Good morning, I've tried to made clean unistall with the drivers, but still not work.

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From the mobo manual.

Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, Aorus gen4 1tb, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T..
benman2785
Big Boss

than - as stated before - its an ASUS problem

try a different board

PC: R7 2700X @PBO + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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