Step 1: Identify the Symptoms

• Are your drawings showing up as perfectly straight lines?
  

Example 1: Straight Lines Only

You draw characters like “E 7 W 7,” but only perfectly straight lines are recorded.

• Is there a delay between drawing and seeing the lines appear?
  

Step 2: Basic System Checks

Try these quick fixes first:

• Update your browser to the latest version
• Disable browser extensions
• Close unnecessary tabs and applications
• Try using another computer if available

Step 3: Hardware Acceleration & WebGL

Check if your system supports WebGL and hardware acceleration:

1. Enable Hardware Acceleration
• In Chrome/Edge: Settings → System → Toggle “Use hardware acceleration when available”
2. Check WebGL Status
• Visit Get WebGL → Look for the spinning cube
• Visit BioSig-ID’s WebGL Check tool → Confirm values for Render, Vendor, Version, and Shading Language
• Go to chrome://gpu → Look for:
• ✔️ WebGL: Hardware accelerated
• ❌ WebGL: Software only

If WebGL is not hardware accelerated, continue to Step 4.

Step 4: Update Drivers

Outdated drivers can cause rendering issues—even if they appear “up-to-date".

• Update video card drivers directly from the manufacturer:
• Intel: Use Intel Driver & Support Assistant
• AMD / NVIDIA / Matrox: Visit official support sites

Drivers should be dated 2020 or later for full compatibility.
Example: Intel WHQL driver from 2015 may appear current but will not work properly.

Step 5: Scan for Malware

Malware can interfere with system performance and input rendering.

If you're unsure how to proceed, seek in-person IT support.

This issue may be caused by malware. If you suspect malware is present, use reputable anti-malware software to clean your device. While we don’t control third-party tools, users have reported success with MalwareBytes AdWareCleaner or Norton Power Eraser to remove unwanted malware.