The graphics display... failed to start up

This error message is typically related to Remote Desktop Protocol (RDP) connection issues when trying to access a Windows EC2 instance. There are a few steps you can try to resolve this problem:

1. Restart your EC2 instance: Sometimes, simply restarting the instance can resolve temporary issues with RDP connections.

2. Check instance size: If you're using a small instance type, it may struggle to handle the graphics load. Consider upgrading to a larger instance if this is the case.

3. Verify Remote Desktop settings: Ensure that the Remote Desktop settings on your EC2 instance are correctly configured.

4. Install proper drivers: Make sure you have the correct display drivers installed on your EC2 instance. For instances with GPUs, like the g4dn series, you may need to install specific NVIDIA drivers.

5. Set custom resolution: If the issue persists, you can try setting a custom display resolution. This can be done by modifying the Windows Registry on your EC2 instance. For example, you can set a resolution of 1536x1024 by adding a registry key.

6. Use Amazon DCV: Consider installing and using Amazon NICE Desktop Cloud Visualization (DCV) server, which can provide better support for display resolutions and reduce CPU usage.

If these steps don't resolve the issue, you may need to contact AWS support for further assistance, as they can provide specific recommendations for your instance type and use case.
Sources
ec2 RDP timing out giving me error code: 0xf | AWS re:Post
Cannot connect to EC2 Windows instance, error code 0xf | AWS re:Post
AWS EC2 g4dn.xlarge - Parsec 1536x1024 - CRU not working? | AWS re:Post