ROOT CAUSE: guacd showed "User resolution is 0x0 at 0 DPI" and
immediately killed every RDP connection.
The Guacamole protocol requires five client capability instructions
(size, audio, video, image, timezone) BETWEEN receiving 'args' and
sending 'connect'. Our handshake skipped all five and jumped straight
to CONNECT. guacd never received the display dimensions, defaulted to
0x0, and terminated the connection.
Now sends the complete handshake:
select → (receive args) → size → audio → video → image → timezone → connect
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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