Re: TightVNC Shows black screen after Win 10 updates

I'm purely speculating,
But I found more than a decade ago that whenever I encountered a black
screen, it was generally because something was unsupported between
your server an client.

Recommend...
- Lower screen resolution
- Lower color depth

You can check your Windows Update for things like device driver
(particularly video driver) updates/upgrades which could have enabled
your Win10 to exceed the capabilities of whatever client device you're
using.

Tony


On Thu, May 31, 2018 at 11:40 AM, Mark Foley <[email protected]> wrote:
> As I suspected. Leave it to Microsoft to continue subtly un-supporting any but their own software!
>
> Fortunately, we have a work-around!
>
> --Mark
>
>
> On Thu, 31 May 2018 17:19:40 +0000 Ed Meadows Tom Perkins <[email protected]> wrote:
>
> Mark,
>
> Well, the need for such a device applies to my machine now, but not sure about other Win 10 machines with this version of the O/S.  It could be that there is something unique only to mine that gives rise to this need.
>
> My O/S is Windows 10 Pro.
>
> I tested MS Remote Desktop with my machine just now, both WITH and WITHOUT the video emulator device and found that MS Remote Desktop works fine in BOTH cases.  So, it appears that it only VNC is affected.
>
> Ed
>
> On 5/31/2018 7:15 AM, Mark Foley wrote:
>
> Ed,
>
> It's good to know that a headless WIN10 machine will need a video emulator device or no remote access, apparently regardess of VNC product.  That's something for everyone to keep in mind for the future.
>
> You mentioned your hardware, but what about the OS? Is is Home? Professional? If Professional, have you tried doing a Remote Desktop into that computer? I'd be curious to know if this problem is related to all remote access, or just VNC.
>
> --Mark
>
>
> On Wed, 30 May 2018 23:53:43 +0000 Ed Meadows <[email protected]><mailto:[email protected]> wrote:
>
> Hi Mark and Yury,
>
> I received my DVI-D EDID emulator today, installed it, and it fixed the problem!
>
> If you're curious, the Win 10 build is a Ryzen 7 1700 on a ASRock X370 Taichi AMD AM4 mobo with a MSI GeForce GTX 1050Ti GPU.
>
> Thanks,
>
> Ed
>
> On 5/30/2018 6:02 AM, Mark Foley wrote:
>
> Yury,
>
> That looks like a great device! I might get one too.
>
> Question, That device just "fakes" a connected monitor. That would take care of Ed's original issue, but I don't see how you could remotely view the BIOS settings as it's not possible to have the VNC Server running when you boot into the BIOS screen. What do you mean, "this HDMI display emulator to allow me to remotely view the BIOS screen." How are you doing that?
>
> --Mark
>
> -----Original Message-----
> On Wed, 30 May 2018 01:14:11 +0000 Yury Averkiev <[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]> wrote:
>
>
>
> Recently I've bought this HDMI display emulator to allow me to remotely view the BIOS screen. It only costs $10 and is 4K capable (not that I need 4K to navigate the BIOS.
>
> https://www.amazon.com/gp/product/B01EK05WTY/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1
>
> Regards,
> Yury Averkiev
> SmartCode VNC Manager (www.s-code.com<http://www.s-code.com><http://www.s-code.com><http://www.s-code.com>)
>
>
>
> On May 29, 2018, at 21:46, Mark Foley <[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]> wrote:
>
> 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]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]>
> To: Mark Foley <[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[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]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]>
> Date: 5/27/18 8:01 PM (GMT-05:00)
> To: [email protected]<mailto:[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[email protected]><mailto:[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.
>
>
>
> --
> Sent from: http://tightvnc.10971.n7.nabble.com/VNC-Tight-List-f3.html
>
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> --
> Det angår också dig när det brinner i grannens vägg. (gammalt svenskt ordspråk)
> It concerns you, too, when your neighbor's wall is on fire. (old Swedish proverb)
> Meaning: We're all in this together.
>
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>
>
>
> ------------------------------------------------------------------------------
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> ___________________________________________________________
> TightVNC mailing list, [email protected]<mailto:[email protected]><mailto:[email protected]><mailto:[email protected]>
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>
>
>
> --
> Det angår också dig när det brinner i grannens vägg. (gammalt svenskt ordspråk)
> It concerns you, too, when your neighbor's wall is on fire. (old Swedish proverb)
> Meaning: We're all in this together.
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___________________________________________________________
> TightVNC mailing list, [email protected]<mailto:[email protected]>
> To change your subscription or to UNSUBSCRIBE, please visit
> https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
>
>
>
> --
> Det angår också dig när det brinner i grannens vägg. (gammalt svenskt ordspråk)
> It concerns you, too, when your neighbor's wall is on fire. (old Swedish proverb)
> Meaning: We're all in this together.
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___________________________________________________________
> TightVNC mailing list, [email protected]
> To change your subscription or to UNSUBSCRIBE, please visit
> https://lists.sourceforge.net/lists/listinfo/vnc-tight-list

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