Re: TightVNC Shows black screen after Win 10 updates

The DVI emulator is probably a better idea than the KVM switch. It's designed to do exactly what you want.

Post your results. I'm curious.

Re. BIOS settings, I was thinking of the one to ignore any video errors, but there might not be such a setting and that still might not work.

--Mark

-----Original Message-----
From: Ed Meadows Tom Perkins <[email protected]>
To: Mark Foley <[email protected]>
Subject: Re: TightVNC Shows black screen after Win 10 updates
Date: Mon, 28 May 2018 14:02:47 +0000

Hi Mark,

Thanks.  I don't have a KVM switch handy and there are no BIOS settings for this.

Someone else suggested using an EDID emulator, so I'm going to try this:

https://www.amazon.com/1920x1200-DVI-D-Emulator-Dummy-Headless/dp/B01EISICO0/ref=sr_1_10/140-3476651-2228763?ie=UTF8&qid=1527515656&sr=8-10&keywords=DVI-D+emulator

There's probably a non-hardware solution/setting somewhere, but for $18, why not?

Thanks,

Ed

On 5/27/2018 7:30 PM, Mark Foley wrote:
Maybe the new Win 10 update is "smart" enough to detect no monitor as shut down the video memory. The VNC server maps the actual video memory. I tried something like this on purpose to turn off the real monitor video (not the monitor itself) and still see the screen on the VNC client. No go.

Try attaching a KVM switch or seeing if there is a BIOS setting to ignore the monitor.



--Mark

Sent from my Verizon Wireless 4G LTE smartphone


-------- Original message --------
From: MossyRock <[email protected]><mailto:[email protected]>
Date: 5/27/18 8:01 PM (GMT-05:00)
To: [email protected]<mailto:[email protected]>
Subject: TightVNC Shows black screen after Win 10 updates

Hello,

Suddenly, after applying the latest Windows 10 updates to a headless machine
used for BOINC crunching, I am getting a black screen when I try to remote
into it from another machine using TightVNC.

I've tried completely uninstalling and re-installing TightVNC server on it
so it's at it's most current release.  I've also tried fiddling with a lot
of its options and with the Win 10 desktop "personalizations" as well
(including the resolution) and none of it has any effect.

Here's the strange thing - when I attach a real monitor to it, I can remote
into it and I can see the desktop just fine. When I remove the real monitor,
the remote session goes black.

I don't know what's changed and I don't know what else to do.

Any ideas?  If you need any specifics about my machine or TightVNC's
settings, just let me know.

Thanks.



--
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