如果Skype for Business屏幕共享无法正常工作、模糊或显示黑屏或冻结屏幕，那么这篇文章可能会帮助您解决问题。造成这种情况的原因可能是软件过时、随机故障，甚至是连接速度慢。

微软说，

Video-based Screen Sharing (VbSS) capability added to Skype for Business ensures that connection time is drastically reduced, and the screen presentation is always in sync between presenter and viewer. Not only is VbSS faster, but it also more reliable and works better in case of low network bandwidth conditions. It reduces the screen refresh rate and so at times this can cause issues for some. VbSS is only used when all participants in the meeting are using the latest version of Skype for Business client, and conference VbSS is enabled on servers where your meetings are hosted. If these conditions are met, your screen-sharing session will automatically start with VbSS. If they are not met, your screen-sharing session will automatically start with Remote Desktop Protocol (RDP) rather than VbSS.

Skype 屏幕共享 黑屏

如果您遇到此问题，请先创建系统还原点，然后查看这些建议是否对您有帮助：

1]更新Skype

更新已安装的Skype软件

2]重新启动屏幕共享

单击停止共享^{(Click Stop Sharing)}。然后再次开始共享^{(Start Sharing)}。如果您有辅助显示器，请使用它并查看。

3]更新^(Update)或回滚图形^(Graphics)驱动程序

如果您最近更新了图形驱动器，请将它们回滚；否则更新它们^{(update them)}，看看它是否有帮助。

4]重置Skype

打开设置^{(Open Settings)}并重置 Skype 应用程序^{(Reset the Skype app)}并查看。

5]编辑注册表

您可以禁用（VbSS）并启用远程桌面协议^{(Remote Desktop Protocol)}（RDP），看看是否有帮助。

打开注册表编辑器并导航到以下键：

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Lync

• 创建一个新的 DWORD，将其命名为EnableConferenceScreenSharingOverVideo并将其值设置为0
• 同时创建一个新的 DWORD，将其命名为EnableP2PScreenSharingOverVideo并将其值设置为0

接下来，导航到以下键：

HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Office\16.0\Lync

• 创建一个新的 DWORD，将其命名为EnableConferenceScreenSharingOverVideo并将其值设置为0
• 同时创建一个新的 DWORD，将其命名为EnableP2PScreenSharingOverVideo并将其值设置为0

重新启动计算机并检查。

如果没有帮助，您可以撤消更改或返回创建的还原点^{(Restore Point)}。

Skype during Screen sharing displays a Black screen on Windows 11/10

If Skype for Business screen-sharing is not working, is blurry, or displays a black or frozen screen, then this post may help you fix the problem. The cause for this could be outdated software, a random glitch, or even a slow connection.

Says Microsoft,

Video-based Screen Sharing (VbSS) capability added to Skype for Business ensures that connection time is drastically reduced, and the screen presentation is always in sync between presenter and viewer. Not only is VbSS faster, but it also more reliable and works better in case of low network bandwidth conditions. It reduces the screen refresh rate and so at times this can cause issues for some. VbSS is only used when all participants in the meeting are using the latest version of Skype for Business client, and conference VbSS is enabled on servers where your meetings are hosted. If these conditions are met, your screen-sharing session will automatically start with VbSS. If they are not met, your screen-sharing session will automatically start with Remote Desktop Protocol (RDP) rather than VbSS.

Skype Screen sharing Black screen

If you face this issue, create a system restore point first and then see if any of these suggestions help you:

1] Update Skype

Update your installed Skype software

2] Restart screen-sharing

Click Stop Sharing. Then again Start Sharing again. If you have a secondary monitor, then use it and see.

3] Update or rollback Graphics drivers

If you recently updated your graphics drives, roll them back; else update them and see if it helps.

4] Reset Skype

Open Settings and Reset the Skype app and see.

5] Edit the Registry

You could disable (VbSS) and enable Remote Desktop Protocol (RDP) and see if that helps.

Open Registry Editor and navigate to the following key:

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Lync

• Create a new DWORD, name it EnableConferenceScreenSharingOverVideo and set its value to 0
• Also create a new DWORD, name it EnableP2PScreenSharingOverVideo and set its value to 0

Next, navigate to the following key:

HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Office\16.0\Lync

• Create a new DWORD, name it EnableConferenceScreenSharingOverVideo and set its value to 0
• Also create a new DWORD, name it EnableP2PScreenSharingOverVideo and set its value to 0

Restart your computer and check.

If it does not help, you may reverse the changes or go back to the created Restore Point.

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