Introduction

Windows Server 2022 has introduced several advancements, yet users have reported challenges with Display Scaling, particularly when accessing the server via Remote Desktop Protocol (RDP) or VMware Horizon. This article delves into the root causes of these DPI scaling issues and offers potential solutions.

Background

DPI (Dots Per Inch) scaling is crucial for rendering user interfaces appropriately across devices with varying screen resolutions. In remote desktop environments, maintaining consistent DPI settings ensures a seamless user experience. However, with Windows Server 2022, discrepancies have emerged, leading to distorted or improperly scaled interfaces during remote sessions.

Root Causes

Deprecation of Legacy Graphics Drivers

Windows Server 2022 transitioned from the legacy INLINECODE0 graphics redirection driver to the Indirect Display Driver (IDD). This shift has impacted how DPI settings are managed during remote sessions. The deprecation of INLINECODE1 means that certain DPI scaling functionalities present in previous versions are no longer supported. Microsoft Documentation

Registry Settings and DPI Values

Investigations have revealed that the registry key INLINECODE2 plays a pivotal role in DPI scaling. On affected systems, this value is often set to INLINECODE3 (indicating 125% scaling) instead of the standard INLINECODE4 (100% scaling). This misconfiguration leads to improper display scaling during remote sessions. Windows Forum Discussion

Implications and Impact

The DPI scaling issues in Windows Server 2022 can result in:

  • User Interface Distortions: Elements appearing too large or too small, affecting usability.
  • Inconsistent User Experience: Variations in display scaling across sessions can confuse users.
  • Operational Inefficiencies: Time spent troubleshooting and adjusting settings detracts from productivity.

Technical Details

Registry Key Analysis

The INLINECODE5 registry key determines the scaling factor:

  • INLINECODE6 (0x60): 100% scaling (default)
  • INLINECODE7 (0x78): 125% scaling

Incorrect values can be set due to user actions or system processes, leading to scaling issues.

Remote Desktop Protocol Behavior

RDP sessions are designed to adapt to client-side DPI settings. However, with the changes in Windows Server 2022, the server may override client DPI requests, resulting in mismatched scaling. Microsoft Q&A

Solutions and Workarounds

Modifying Registry Settings

Administrators can adjust the INLINECODE8 value to ensure correct scaling:

  1. Open Registry Editor: Press INLINECODE9 , type INLINECODE10 , and press Enter.
  2. Navigate to: INLINECODE11
  3. Modify INLINECODE12 : Set the value to INLINECODE13 (decimal) for 100% scaling.
  4. Restart the System: Changes will take effect after a reboot.
Caution: Always back up the registry before making changes.

Implementing Group Policy Settings

To enforce consistent DPI settings:

  1. Open Group Policy Editor: Press INLINECODE14 , type INLINECODE15 , and press Enter.
  2. Navigate to: INLINECODE16
  3. Enable DPI Settings: Configure policies to enforce specific DPI settings.
  4. Apply and Restart: Ensure changes are applied across user sessions.

Utilizing Third-Party Tools

Tools like AnyViewer offer adaptive scaling features, providing a more consistent remote desktop experience. AnyViewer Guide

Conclusion

DPI scaling issues in Windows Server 2022 remote sessions stem from changes in graphics driver architecture and registry configurations. By understanding these root causes and implementing the suggested solutions, administrators can enhance the remote desktop experience, ensuring clarity and consistency for users.