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From "Daryl Borth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GUACAMOLE-262) VNC connection fails if true color flag is set to 255
Date Mon, 03 Apr 2017 15:29:41 GMT

    [ https://issues.apache.org/jira/browse/GUACAMOLE-262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953662#comment-15953662
] 

Daryl Borth commented on GUACAMOLE-262:
---------------------------------------

Created pull request: https://github.com/apache/incubator-guacamole-server/pull/83

> VNC connection fails if true color flag is set to 255
> -----------------------------------------------------
>
>                 Key: GUACAMOLE-262
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-262
>             Project: Guacamole
>          Issue Type: Improvement
>          Components: VNC
>            Reporter: Daryl Borth
>            Priority: Minor
>
> I was having trouble getting Guacamole to connect to ESX 6.5's VNC server. The issue
is reported here - https://github.com/LibVNC/libvncserver/issues/141
> Using TightVNC, TigerVNC, UltraVNC, and Chicken of the VNC the connection worked fine
- only Guacamole failed. After some Wireshark sleuthing I found that libvncserver's client
by default sets the trueColour flag to TRUE (which is -1 which is 255), whereas all of the
other clients listed above set this flag to 1. Although the spec is vague - it says non-zero
is "true" - I would suggest setting this flag to 1 to maximize compatibility:
> void guac_vnc_set_pixel_format(rfbClient* client, int color_depth) {
> 	client->format.trueColour = 1;
> 	



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