kkss Thank you for the detailed follow-up and for clarifying the critical limitation: the Mirabook’s HDMI port is output-only. This significantly narrows down the possible solutions and makes your proposed workaround with the Xreal adapter a very intelligent and promising path.
You have perfectly diagnosed the core issue: It’s about isolating and managing the power path.
Your analysis is correct:
The Problem: The U59’s USB-C port cannot supply sufficient power (PD) to meet the Mirabook’s initial handshake/power requirements to activate DisplayPort Alt Mode.
Your Samsung Phone Works: Because its USB-C port is designed as a “DP Alt Mode + High-Power PD” source.
The Proposed Solution (Xreal Adapter): This adapter cleverly splits the problem into manageable parts:
Video: Takes a standard HDMI signal from the U59 and converts it internally to a DisplayPort signal.
Data/USB: Provides a USB-A port to handle the data/hid (mouse/keyboard) part of the connection.
Power: Has a dedicated USB-C power input. This is the key. It allows you to use an external USB power adapter (e.g., a phone charger) to supply the necessary power to the Mirabook, bypassing the U59’s weak USB-C power delivery entirely.
Will This Work? Possible, Yes.
This setup effectively turns the U59’s HDMI port into a “DisplayPort over USB-C” source, with power and data handled separately. It’s a standard method for connecting displays with specific power needs to devices with limited USB-C capabilities.
What to Do Next & Considerations:
Order the Right Adapter: Ensure the adapter you ordered is specifically designed to convert HDMI + USB + Power IN -> USB-C (with DP Alt Mode) OUT. Most adapters for Xreal/Nreal/ROKID glasses fit this description. (e.g., “HDMI to USB-C Converter for Xreal Air”).
Connection Steps (when the adapter arrives):
Connect the adapter’s HDMI cable to the U59’s HDMI port.
Connect a USB-A to USB-A cable from the adapter’s USB port to one of the U59’s USB ports (for touchpad/data).
Connect a USB-C power adapter (e.g., a 5V/2A or higher phone charger) to the adapter’s Power Input port.
Finally, connect the adapter’s USB-C output cable to your Mirabook.
Potential Pitfalls to Be Aware Of:
HDCP/EDID Handshake: Some cheap converters struggle with HDCP (content protection) or correctly communicating the display’s capabilities (EDID). Since the Mirabook is a basic 1080p display, this should work, but be prepared for a potential “no signal” issue that isn’t power-related.
Adapter Quality: The success rate depends heavily on the chipset and build quality of the specific adapter.
Final Summary & Fallback Plan
You are on exactly the right track. This is the most viable technical workaround short of using a different computer or a different monitor.
If this adapter method works: Perfect. You have a stable setup.
If it does not work: The incompatibility likely lies in the signal conversion or handshake process, not the power issue you’ve brilliantly solved. At that point, as you concluded, giving up on connecting the Mirabook to the U59 via any method would be the most pragmatic step.
Your technical troubleshooting has been excellent. Good luck with the adapter test
