How to resolved blue lines on the VDI environment

Question

How to resolve blue lines on the VDI environment. I am getting blue lines inside the Windows app VDI

Answer 1

Hi Ashish Shreyakar,

I just wanted to follow up and see if you had the opportunity to test the display configurations we discussed.

Were you able to successfully eliminate the blue lines by disabling hardware acceleration in your Remote Desktop or Windows App client? Alternatively, did your IT team need to step in and update the WebRTC Redirector Service or apply the specific KB patch for your communication apps?

If the visual artifacts are still persisting during your VDI sessions, or if you need any further assistance navigating the client settings or updating your local display drivers, please do not hesitate to reach out. I am always here to help you get this resolved!

Answer 2

Hi Ashish Shreyakar,

The appearance of blue lines inside your VDI session is a classic visual artifact that points directly to a video rendering conflict or a graphical decoding failure. In modern VDI environments accessed via the new Windows App or the Remote Desktop client, this issue most frequently stems from a desynchronization between the client application's hardware acceleration feature and your local physical machine's graphics processing unit (GPU). When the VDI client attempts to offload the heavy lifting of video decoding to a local graphics driver that is either outdated or experiencing a state conflict, the resulting image stream becomes corrupted before it hits your monitor, manifesting as horizontal or vertical blue lines across the application window.

To systematically resolve this and immediately clear up your display, your first practical step should be to disable hardware acceleration within your connection client to force stable, software-based rendering. If you are using the modern Windows App or the traditional Remote Desktop client, open the application, click on the Settings (gear icon), navigate to the display or general preferences, and toggle off the option for Hardware acceleration (or "hardware-accelerated video decoding"). Once you have disabled this feature, completely close the application and relaunch it to establish a fresh connection to your VDI host. To prevent this from happening in the future when acceleration is turned back on, you must ensure that the display drivers (Intel, NVIDIA, or AMD) on your physical local machine are updated to the latest manufacturer versions.

Additionally, if these blue lines only appear specifically when you are viewing camera feeds or sharing screens in communication apps like Microsoft Teams or Skype for Business within the VDI, this points to an overlay optimization glitch. For legacy Lync/Skype environments, your IT administrator must apply the specific update KB3115478 to the host virtual machine image to fix this exact rendering bug. For modern Microsoft Teams, your administrator needs to verify that the host's WebRTC Redirector Service is fully up to date to prevent the video overlay from corrupting the session's graphics channel.

I hope this answer brought you some useful information to diagnose and clear up the visual artifacts in your session. If it did, please hit "Accept Answer". Should you have any questions or if the issue persists after adjusting your hardware acceleration settings, feel free to leave a comment!

Tracy.

Answer 3

The described “blue lines” issue in a VDI session matches a known video rendering problem seen in older Lync/Skype for Business VDI clients, where video or UI regions render as blue instead of showing proper content.

For that class of issue, the documented resolution is to update the VDI-side client components to a fixed build. Specifically, for Skype for Business/Lync VDI, installing the KB3115478 update resolves the blue video box problem:

1. Identify whether the VDI image is running Skype for Business 2015 (or Lync 2013) components.
2. If so, install the appropriate update package on the VDI image:
   • 32-bit: “Update for Skype for Business 2015 (KB3115478) 32-Bit Edition”
   • 64-bit: “Update for Skype for Business 2015 (KB3115478) 64-Bit Edition”
3. After installing, recompose or redeploy the VDI image as appropriate for the environment, then reconnect to the VDI session and verify that the blue artifacts no longer appear in the affected app/video area.

If the blue lines are appearing in Microsoft Teams or the Windows shell rather than Skype for Business/Lync, the provided context does not include a specific fix. In that case, focus on updating the relevant client (Teams, display drivers, or remote desktop client) in the VDI image and endpoint, and verify that the VDI optimization components are current.

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References:

• Blue box in a video meeting that you join from a link in a Lync 2013 (Skype for Business) VDI client