Posted by VGuitarist
Digon

Remote resolution is 640 x 480 until I turn on my monitor

My Windows desktop has a LG 4K monitor and Radeon x570 graphics card. The latest drivers are installed for both devices. I have the latest build of TV 13 installed.

If I turn on my computer with the monitor off, the TV remote resolution is stuck at 640x480. There are no other resolutions offered. All I have to do is turn on my monitor and  the remote resolution instantly changes to 3840x2160 (what I want).. The behavior occurs with my Windows laptop, iPad and iPhone.

Any idea why this is happening and how to fix it?

1 Accepted Solution

Accepted Solutions
Posted by VGuitarist
Digon
Solution

Re: Remote resolution is 640 x 480 until I turn on my monitor

Good news. The behavior is exclusive to the display port. Last night, I connected an HDMI cable to the monitor (disconnected DP) and the problem is gone.Now, I can leave the monitor off, boot the computer and get 3840x2160 remotely. Would prefer to keep the display port connection, but this will work..

Thanks @Scotty for your thoughts

-VGuitarist
(Gibson - yes I have one, among many other guitars)

12 Replies
Posted by Senior Moderator Senior Moderator
Senior Moderator

Re: Remote resolution is 640 x 480 until I turn on my monitor

Hi VGuitarist,

This occurs because this is the display your desktop puts out when it cannot detect the hardware/recommend resolution.

It is actually very common for Radeon graphics cards to not put out a display at all if a monitor is not connected and then you would just get a black screen.

Unfortunately there is no fix for this, you need to make sure the monitor is connected as while it is off, the system is essentially headless which we cannot support unfortunately.

-Scotty

Senior Moderator
Did my reply answer your question? Why not accept it as a solution to help others?
Posted by VGuitarist
Digon

Re: Remote resolution is 640 x 480 until I turn on my monitor

@Scotty,

Thank you for the reply. It just happened again; I forgot to turn on my monitor this morning and just drove 20 miles home.to fix it. Now back to work...

While I have been a ATI/AMD fan for many years, I am not married to the rx570 video card. Is there another 4-8 GB high end video card I can use that doesn't have this problem?

Posted by VGuitarist
Digon

Re: Remote resolution is 640 x 480 until I turn on my monitor

Here's what AMD said about it.after trying to recreate the issue in their lab:

Thank you for contacting AMD.

Please be advised that unfortunately, TeamViewer is getting the resolution that the Windows OS on the PC is offering, and that usually depends on what Windows is able to gather regarding the monitor that is connected to the system, therefore, if the monitor is not being recognized when it is off, Windows won't be able to offer other resolutions to TeamViewer.

You could alternatively try to install, if available, the drivers for the 4K Monitor, and then try to update it on the Device Manager so that it is recognized correctly by Windows, and not as a standard monitor. This way, it would be possible that Windows assumes the resolutions that the monitor is able to handle even if it is off, although, we cannot guarantee this.

However, if the situation remains the same, you would have to keep the monitor on so that the OS recognizes the available resolutions for it.

For further questions, please do not hesitate to contact us again.

Best regards,

Joseph

AMD Global Customer Care

Posted by Senior Moderator Senior Moderator
Senior Moderator

Re: Remote resolution is 640 x 480 until I turn on my monitor

Hi VGuitarist,

AMD are correct.

And unfortunately, it's not really a GPU specific thing. In fact, it is normally more likely to be fixed by changing to a monitor than changing GPU.

The long and short of it is that we do not support headless systems. If your monitor is off, your system is essentially headless.

As AMD said, without a monitor attached, windows does not know what resolution to offer and we do not have the ability to force non-native resolutions. You need to find some way of forcing the OS to create the correct resolution.

-Scotty

 

Senior Moderator
Did my reply answer your question? Why not accept it as a solution to help others?
Posted by VGuitarist
Digon
Solution

Re: Remote resolution is 640 x 480 until I turn on my monitor

Good news. The behavior is exclusive to the display port. Last night, I connected an HDMI cable to the monitor (disconnected DP) and the problem is gone.Now, I can leave the monitor off, boot the computer and get 3840x2160 remotely. Would prefer to keep the display port connection, but this will work..

Thanks @Scotty for your thoughts

-VGuitarist
(Gibson - yes I have one, among many other guitars)

Highlighted
Posted by Porzingasm
Photon

Re: Remote resolution is 640 x 480 until I turn on my monitor

There are also options for "headless hdmi adapters" which can be plugged in and serve up to a 1080p "output".

 

https://www.amazon.com/gp/product/B06XT1Z9TF/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Posted by SalKhan
Digon

Re: Remote resolution is 640 x 480 until I turn on my monitor

This is definitely a software/driver based issue. Some update recently for me now cause the resolution to not only change, but reverse (eg: 1080x1920, 480x620 etc..) when my display (a TV in my case) was powered off. It almost looks formatted to fit on a mobile device?

Regardless, I deleted the driver (uninstall software option checked) and let Win10 use a generic driver and the problem was solved for TeamViewer. Granted I can't scale it properly on the TV with the software, but my remote session are now in 1920x1080 regardless of display power state.

Posted by dreduard
Electron

Re: Remote resolution is 640 x 480 until I turn on my monitor

> The long and short of it is that we do not support headless systems. If your monitor is off, your system is essentially headless.

How is this possible when it is not a problem for both RDP and **Third Party Product** (that is, a **very well known THIRD PARTY PRODUCT**)?

Posted by SalKhan
Digon

Re: Remote resolution is 640 x 480 until I turn on my monitor

My solution has been to disable my graphics driver in device manager when I'm not on the system itself (ie: traveling and using my laptop or phone).

However when I want to use that system again I have to connect remotely and re-enable the driver.
Posted by fod
Henagon

Re: Remote resolution is 640 x 480 until I turn on my monitor

I agree.  Why is this not a problem with RDP?

Posted by gyap
Henagon

Re: Remote resolution is 640 x 480 until I turn on my monitor

The solution is that to connect a real monitor to the headless machine. Then the OS will see it. Then in the device manager you have to update the basic monitor (not the display adapter!) driver, just takes a minute. After that everythink will work. At least in my case. 

What I did more is to bring all windows 10 machine to the latest windows 10 version actually to 1903. It can be important too, because of there were windows update issues with the RDP (Remote Desktop). 

The other solution could be what other supposed here, to use a dummy, headless ghost display connector (very cheap).

As I understand this failure regarding to usually AMD video cards, because of if there isn't a real monitor connected, then it sends somewhow just the basic, lowest resolution display, what will be later captured by Teamviewer or other remote desktops solutions. In our case the video card was a AMD FirePro.

Posted by GM539
Electron

Re: Remote resolution is 640 x 480 until I turn on my monitor

Not an AMD specific issue, but what I noticed is that nvidia cards don't have this problem. I purchased 5 computers and connected them to network for remote configuration. 4 have AMD RP WX4100s and one has a quadro P1000. The quadro allows me to go up to 4K remotely with no monitor attached, and both cards have only 4 mini DP ports on them.