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Posted by
Digon

Re: Black screen not working (Windows 10)

Hi PaulB,

We had tried to install TV on "fresh" - new PCs only with W10 connected directly to the ISP router without sucess.

We have several customers with SOPHOS UTM, and we found no difference between them and other customers who don't have UTMs.

In fact all installations made since August/September 2017 are not able to show black screen - however in the same customers PCs who have installations made before that can still show black screen.

Carlos

Posted by
Henagon

Re: Black screen not working (Windows 10)

Has anyone found a solution for this?

We are using Windows 10 Version 1607 (LTSB) and blanking does'nt work properly. It blanks for a few seconds and then reverts.

Posted by
Digon

Re: Black screen not working (Windows 10)

Current version is 14.1.3399 and Teamviewer didn't solve this issue yet. I had opened several suport cases - and I think they simply don't care.
They keep adding more "features" - but the basic does not work.

 

 

Posted by
Trigon

Re: Black screen not working (Windows 10)

There is a solution that required action by TeamViewer

The Monitor Driver needed for Black Screen the is this file - c:\windows\system32\drivers\TVMonitor.sys.   

If you look at the properties of that file, then the Digitial Signature Details,  then click View Certificate of the signer, and you will see that it is code signed by "TeamViewer GmbH" who's certificate expired 3/3/2018. 

That is why in device manager, the device says "Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)" 

This is just lazyness. Can be fixed by TV updating or issuing an new code signing certificate.

Posted by
Trigon

Re: Black screen not working (Windows 10)

TV please fix this, we shouldnt have to revert back to an old GPU driver?

Where upto 4.16 for crying out loud?

Posted by Senior Moderator Senior Moderator
Senior Moderator

Re: Black screen not working (Windows 10)

Hi there, 

Thanks for your posts. Please find additional information here: How to turn the remote screen black

Not all monitors, video cards, motherboards, or BIOS support the TeamViewer monitor driver solution, which is required to use the black screen.

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

All the best :) 
Natascha

Community Moderator
Posted by
Trigon

Re: Black screen not working (Windows 10)

Natascha,

The problem has nothing to do with all monitors, video cards, motherboards, or BIOS support

The solution requires action by TeamViewer.

The Monitor Driver needed for Black Screen the is this file - c:\windows\system32\drivers\TVMonitor.sys.   

If you look at the properties of that file, then the Digital Signature Details, then click View Certificate of the signer, and you will see that it is code signed by "TeamViewer GmbH" whose certificate expired on 3/3/2018.

That is why in device manager, the device properties says "Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)" 

This can only be fixed by TeamViewer updating or issuing a new a new signed driver signed by a valid code signer.

Posted by
Digon

Re: Black screen not working (Windows 10)

And this is also causing a issue with some laptops:

After installing TV (and not be able to install the TV screen driver) the user is not able to use the FN+Fx keys combination to increase/decrease the brightness, volume, etc.

The "workaround" requires:
1. removing the (not working) screen driver in device manager;
2. search for update drivers for monitor - with luck windows update will find and install updated drivers and the use will be alble to use FN+TX keys.

TV is completelly missing the point on this: adding more "features" on their product and completelly forget to fix all this issues.

 

Posted by
Trigon

Re: Black screen not working (Windows 10)

Hi tAp,

Do you think this will work for the driver?

[The URL link has been removed.]


Thanks

Posted by
Trigon

Re: Black screen not working (Windows 10)

I think it will work.

The instructions are for "How to Sign an Unsigned Driver for x64 Windows 10, 8.1 or 7 with a Self-signed Certificate", but the driver is already digitally signed. 

Please try and let us know.  

Posted by
Digon

Re: Black screen not working (Windows 10)

still not working....bah

Posted by
Neutron

Re: Black screen not working (Windows 10)

Which one did u use for it now?
Posted by
Trigon

Re: Black screen not working (Windows 10)

theres still no fix man..... even on the latest version of TV 14.4.2669

Driver: TVMonitor.sys

Date Modified: ‎Wednesday, ‎8 ‎August ‎2018, ‏‎5:31:20 PM


@Barbara04 wrote:
Which one did u use for it now?

 

Posted by
Digon

Re: Black screen not working (Windows 10)

I confirm, no changes even in Windows 7.
Posted by
Electron

Re: Black screen not working (Windows 10)


@Natascha wrote:

Hi there, 

Thanks for your posts. Please find additional information here: How to turn the remote screen black

Not all monitors, video cards, motherboards, or BIOS support the TeamViewer monitor driver solution, which is required to use the black screen.

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

All the best :) 
Natascha


@Natascha Have you read anything in this thread? Your reply is a slap in the face to all inquiring here. You point people to a KB article? Your driver/certificate expired a year ago, and people have been waiting +1 year for a fix/new driver? Do you even know? Have you done a fresh install?? What OS are you using that the driver installs on??? Can you please provide an update/solution?

Thank you. 

Posted by
Digon

Re: Black screen not working (Windows 10)

Really feel shame on TeamViewer.

I am just a normal home user. After they put this feature to a business subscription. I bought it without any hesitation.

But after such a long long long long time, they still didn't fix this bug.

Shame.

 

Posted by
Trigon

Re: Black screen not working (Windows 10)

Guys,

This discussion can be closed now, TV has finally fixed the issue in v15.X.X

Thanks

Posted by
Digon

Re: Black screen not working (Windows 10)

Sorry, but no.

Black screen still does not work on version 15.2.2756H - tested a few minutes ago.
It works on older systems (last friday i did a full reinstall of Windows 10 1909 in a 5 year PC and was able to install the display driver and activate black screen), but not on newer PCs (and by newer I mean PCs since aprox.2016).
By example: HP 400 i7-700C, intel HD630 - blackscreen does not work (install of display driver fails).

I start to believe that TV will never fix this issue - they are focused in adding more and more "features" that are not core for Remote Control, and only create new issues, instead of fix the problems.

Our customers are requesting that we use black screen: we work with ERP and payroll  systems, so we had to sign NDAs and assure our customers that we comply with EU's Data Protection rules - but when we need to access confidential data (like the wage and fiscal information of an Employee) we can't use back screen, so we don't really know who can be looking at the screen on the customer side - as a result we have more and more situations where we need to go physically at the customer to solve an issue.

Posted by
Digon

Re: Black screen not working (Windows 10)

Thanks for the information,

and I think I have heard that one essential condition for function of black screen is that the monitor ought to have a physical power button.

Posted by
Digon

Re: Black screen not working (Windows 10)

Hi,

I don't think so.

My TV version is 15.1.3937, and this issue still exists.

Posted by
Trigon

Re: Black screen not working (Windows 10)


@songyuc wrote:

Hi,

I don't think so.

My TV version is 15.1.3937, and this issue still exists.


Was between software TeamViewer v15.0.8397 &  15.1.3937  that the Black Screen is fixed. If what you're saying is v15.1.3937 still doesn't work then try v15.0.8397 as it did work for us! 

Cheers

Posted by
Trigon

Re: Black screen not working (Windows 10)


@CarlosC wrote:

Sorry, but no.

Black screen still does not work on version 15.2.2756H - tested a few minutes ago.
It works on older systems (last friday i did a full reinstall of Windows 10 1909 in a 5 year PC and was able to install the display driver and activate black screen), but not on newer PCs (and by newer I mean PCs since aprox.2016).
By example: HP 400 i7-700C, intel HD630 - blackscreen does not work (install of display driver fails).

I start to believe that TV will never fix this issue - they are focused in adding more and more "features" that are not core for Remote Control, and only create new issues, instead of fix the problems.

Our customers are requesting that we use black screen: we work with ERP and payroll  systems, so we had to sign NDAs and assure our customers that we comply with EU's Data Protection rules - but when we need to access confidential data (like the wage and fiscal information of an Employee) we can't use back screen, so we don't really know who can be looking at the screen on the customer side - as a result we have more and more situations where we need to go physically at the customer to solve an issue.


Yep it's working!!

Using the following versions of TV:

Host - v15.1.3937
Full Version of TV - v15.2.2756

Just tested working...what version are your hosts / Full TV if they're not working?

Cheers

2 Replies
Posted by
Digon

Re: Black screen not working (Windows 10)

Thanks for the information,

but I still want to use the updated version of TeamViewer.

Posted by
Digon

Re: Black screen not working (Windows 10)

@RCT_IT:

To be clear: It is not working with all HW - even with version 15.2.2756 on HOST and on my PC black screen does not work with recent HW (at least not with recent intel graphics).

Let's see an example:

One of our customers has +80 Pcs and Laptops - all of them has TV installed (not all of them have 15.2.2756).
From the +80 PCs at least 70 are HP PCs, from selected "families" - usually using the integrated (intel) graphics.
Let's look at one of this "families": HP ProDesk 4xx - since they have different generations (G1, G2, G3, G4, G5 and G6).
On older generations black screen still works - on newer generations it doesn't.

But note that this is not a HP-related problem - we have the same problem with other manufacturers - as a general rule in older PCs black screen works, in newer ones (last 3/4 years) don't.

 

Posted by
Digon

Re: Black screen not working (Windows 10)

I have the same issue with HD4400 on Dell Latitude E7440 embedded in the original docking station and monitor connected via DisplayPort to that docker. I would like to underline that in the much older versions (I don't know, maybe 13 or earlier) it has been working like it should be.

Posted by
Henagon

Re: Black screen not working (Windows 10)

On Windows 10 machines that were upgraded from Windows 7, which already had TV running on them, the black screen still works. Currently running version 15.3.2682.

For newer machines which were built with Windows 10 and had TV installed from scratch, black screen doesn't work. Currently running version 15.3.2682.

C:\Windows\System32\drivers\TVMonitor.sys file on both machines is the exact same file. For those who have said that the issue is with digital signing, could it be that when a machine is upgraded from Windows 7 there isn't a need to check existing signatures, but for a new install there is, so that's why it doesn't work on the native install Windows 10 machines? 

It's really important to our company to have the remote black screen functionality on all machines, not just the ones upgraded to Windows 10. @Natascha , please could you request that one of TV's developers look into the digital signing of the driver and perhaps just update the signature anyway since it has expired. To my naive mind, that seems like a five minute exercise on TV's part that could have a huge impact for lots of people.

 

Posted by
Digon

Re: Black screen not working (Windows 10)

I've the Same issue... :(  Not working the black screeen on windows 10


@ebir909 wrote:

@wrote:

This seems to be the oposite of the common problem:

I'm unable to show a black screen on the computer I'm connecting to.

I can select "disable remote imput" - which works, and I can also select the "show black screen". Bu this does nothing. On the remote computer, the input is disabled but the screen shows everything.

I've also tried selecting the "enable black screen" option in the tw options on the remote computer, but when I do this the client cannot even connect to it: It hangs forever on "initializing display parameters".

Anyone got any ideas? I was about to buy a license for TW when I noticed this, and it's a complete show stopper for me. There's no official TW help to get either, since I haven't bought a license yet.

I've tried installing and reinstalling the TW monitor drivers on both machines, but TW doesn't even appear to be TRYING to black the remote screen.


I have same but didnt get solution. 


 

Posted by
Henagon

Re: Black screen not working (Windows 10)

This feature needs to be fixed, It hasnt worked properley for a few years there is no reason for this not to work on modern hardware.Im pretty sure it isnt rocketsurgery to get it working.

Sort your **bleep** Teamviewer, you get more than enough money from subscriptions to afford to throw a few developers on this problem instead of using them on "see through your customers eyes", endpoint protection and backup-solutions that i'm sure noone asked for in the first place. 

So get to it!

Posted by
Digon

Re: Black screen not working (Windows 10)

Good news, guys!

After 3 years, they finally fixed the problem without installing any drivers.

It is confirmed on my computer: Windows 10 1909 with the latest TeamViewer 15.4.8332 :)

https://community.teamviewer.com/t5/Change-Logs/Windows-v15-4-8332-Full-Change-Log/m-p/90074

 

 

Posted by
Electron

Re: Black screen not working (Windows 10)

Good news but what about the new image that are shown on black screen window.... 
It should be configured! .. Maybe we want to display a custom message or a company branding style....

I`m verry dissapointed that this could`t be changed....