#1486 TightVNC Server Windows - Blank Screen when HDMI Monitor Off

[Jason Bolger]

Hi there,

I have found since changing monitors that TightVNC Server does not work when the monitor is switched Off.

This can be replicated with the latest version 2.8.23.

In the log I see these errors:

[12012/ 7656] 2019-09-29 12:53:52 ! Win8ScreenDriverImpl catch an recoverable error with reason: Catched WinDxRecoverableException: Can't AcquireNextFrame(), (887a0026)
[12012/22140] 2019-09-29 12:53:52 ! Win8ScreenDriverImpl has an invalid state. The invalid state can be a part of screen propery changes. An update signal will be generated as a screen size changed signal.

I found that UltraVNC does not have this issue.

What's the chance of a fix?

Thanks,
Jason

[filbert]

same here, same error messages. Any sign of a fix? I'm trying to run my PC headless.

This is TightVNC version 2.8.27, Windows 10 Home, version 1909.

RealVNC quote a fix of setting CaptureMethod to 1 but I can't find a similar option in TightVNC. There's thread at https://sourceforge.net/p/vnc-tight/mailman/message/36672198/ that seems related.

Edit. Actually, not quite the same as I have the problem when no monitor is attached. Same error and, I assume, same reason as OC can't detect monitor.

[cla inno]

blank screen if monitor is swithed OFF

with display port and Windows 10 Pro 1909
TightVNC 2.8.27

[filbert]

In case it's useful to others, I have got round my problem (which is running my PC with no screen or keyboard) by using an HDMI 'dummy' plug. Only £5 on eBay.
I tried UltraVNC and RealVNC but I had odd authentication issues that I didn't bother to try to resolve

[efa]

using an hardware solution for a software trouble seems wrong