Diagnosis result - 2026-05-27

Monitor:
  Name: TF2416
  Short Monitor ID: TFC0238
  Win7 adapter: Intel(R) HD Graphics Family

Important VCP record from vcp_primary.tsv:
  VCP Code: 60
  Name: Input Select
  Read-Write: Read+Write
  Current Value: 1
  Maximum Value: 4
  Possible Values: 1, 3

Conclusion:
  Win7-side DDC/CI works.
  The old scripts failed because HDMI was set to generic value 17.
  This TF2416 only reports input values 1 and 3.

Updated values:
  VGA / Win7: 1
  HDMI / Mac: 3
  Monitor target: TFC0238, not Primary

Next test:
  1. On Win7, run switch_to_mac_hdmi.bat.
  2. If it switches to Mac, manually switch back to Win7.
  3. On Win7, run restart_watcher_now.bat.
  4. On Mac, run trigger_win7_from_mac.command.

If step 1 still fails:
  Open ControlMyMonitor GUI on Win7 and manually set VCP 60 / Input Select to 3.
  If GUI value 3 also fails, the monitor accepts reads but ignores input switching writes.
