Show a blank screen

[Abomin]

When i connect to a client, i want the client's monitor to show a blank screen or a image or something. So people understand that's the computer is occupied and i don't want them to see what i am doing neither. Can i do that with UltraVNC?

[YY]

Yes you can.

Procedure to Blank the Remote Monitor
1. At the Server, the "Enable Blank Monitor on Viewer Request" box must be checked (at Admin Properties).
2. At viewer, whenever connected, click the "Toggle Remote Input and Remote Blank Monitor" button
　 at Viewer Toolbar

Caution: The display card of server must be able to support the sleep mode, otherwise the screen will not blank as expected.


Procedure to Display an image at Remote Monitor
1. At the Server, check both the "Enable Blank Monitor on Viewer Request" & "Enable Alpha-Blending Screen Blanking" box.
2. Put the image file to the same folder as winvnc.exe, and its name must be:background.bmp
3. At viewer, whenever connected, click the "Toggle Remote Input and Remote Blank Monitor" button
　 at Viewer Toolbar

Caution: There is a drawback, some menu info is drawn in semi transparent, when alpha blending blanking is used, you can't see the semi transparent menu's, and sometimes they popup in the local display.

[dvpswe]

When I enable the blank screen option, the Winvnc.exe service CPU usage jumps to about 30% on a dual-core laptop. Using the blank screen option on a desktop with quad-core, the CPU usage is negligible. I have tried various options in the properties setting to no avail. Has anyone else seen similar behavior?

[timo]

Yes you can.

Procedure to Blank the Remote Monitor
1. At the Server, the "Enable Blank Monitor on Viewer Request" box must be checked (at Admin Properties).
2. At viewer, whenever connected, click the "Toggle Remote Input and Remote Blank Monitor" button
　 at Viewer Toolbar

Caution: The display card of server must be able to support the sleep mode, otherwise the screen will not blank as expected.

As I try as described above, the screen on server turns "blank" showing the same kind of image as in ultravnc.ico, but the same image is shown also on viewer !

I believe the viewer should show the servers actual unblanked screen, or did I understand this all wrong?

[YY]

Are you using the 1.0.5.x ? That has a bug as what you described (reference [post=57424]Toggle Remote Input and Remote Blank Monitor doesn't work[/post]

Please try to update to the latest version.

[timo]

Are you using the 1.0.5.x ? That has a bug as what you described (reference [post=57424]Toggle Remote Input and Remote Blank Monitor doesn't work[/post]

Please try to update to the latest version.

I am using 1.0.6.4. The server runs on Vista 32-bit and Viewer runs on XP 32-bit.
I studied the link above, and in my case it seems that whether "Remove Aero (vista)" is checked or unchecked it has no effect on this.

[YY]

Oh! Too bad .....

But I can't verify as I don't have a Vista system to test, but under my WinXP SP2, the 1.0.6.4 runs properly. The eye.ico is displayed on the server screen, and viewer pc can watch the remote screen w/o any problem.

Hope other users and/or developers can help to verify.

By the way, the thread I refered reported that this problem appear only if using Video Hook Driver. Would you please to check this too.

[timo]

By the way, the thread I refered reported that this problem appear only if using Video Hook Driver. Would you please to check this too.

I have checked this and yes, it happens only if Video Hook Driver is in use. Without Video Hook Driver, it works as supposed to, but slow....

Hopefully in 107 this problem is corrected also for Vista.

[timo]

Hopefully in 107 this problem is corrected also for Vista.

Some new information of this feature with 107.7.

If I turn on screen blanking when the server (Vista 32-bit) is showing logon screen, blanking works almost as supposed to, even if I logon to server afterwards. Almost means, that local keyboard and mouse are locked but no UltraVNC icon is displayed on server's screen.

But, if I logon first and turn on screen blanking after that, all I see in the viever is the UltraVnc icon.

[nbkqq5g]

Is anyone familiar with a way to auto blank the screen I would prefer my users not have to click a button at all.