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https://issues.apache.org/jira/browse/GUACAMOLE-1170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17193854#comment-17193854
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Mike Jumper commented on GUACAMOLE-1170:
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It is very relevant. When both flags are checked, support for the CLIPRDR
channel is not loaded at all, and its conceivable that the Windows RDP service
might fail to provide audio input if the CLIPRDR channel is not present. There
is some precedent for Windows RDP requiring a particular channel to be loaded,
even if unused, for other channels to work.
If the behavior you're seeing occurs only when paste is disabled, independent
of whether copy is also disabled, then I'm not sure how what you describe could
be possible. When only "disable paste" is checked, all that happens is
Guacamole's RDP support rejects inbound clipboard streams. All other streams,
including received audio data, would still be processed.
> RDP "Enable audio input (microphone)" is not working when "Disable pasting
> from client" option is also set
> ----------------------------------------------------------------------------------------------------------
>
> Key: GUACAMOLE-1170
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1170
> Project: Guacamole
> Issue Type: Bug
> Components: RDP
> Affects Versions: 1.2.0
> Environment: Guacamole server version: 1.2
> Guacamole server OS: RHEL8
> Tested RDP servers - Windows 10, Windows Server 2012 R2, Windows Server 2016
> Reporter: Zsolt Pribusz
> Priority: Minor
> Labels: RDP, audio, clipboard
>
> Hi!
> We encountered a problem regarding RDP audio input not working in some of our
> connections.
> The Remote Audio device was properly present in session, and browser also
> asked permission to use microphone, but no audio input stream went through to
> the recording software. (Also the recording indicator din't appear on browser
> tab in chrome) Since there was one test machine where audio input worked, we
> compared the connection profiles. After some testing, we figured out, that
> RDP "Enable audio input (microphone)" is not working properly when "Disable
> pasting from client" option is also set in connection settings.
> After this, we tested what is the behavior if pasting from client is enabled
> in connection settings, but in browser the clipboard access is disabled for
> guacamole site. In this case the audio input still works as expected.
>
>
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