Chapter 12. Accessing Client Resources from the Terminal Server
12.2.5. Limitations and additional information
• When reconnecting to an existing session, it might take up to 10 seconds before the serial ports are
available.
• A maximum of two serial ports per session can be redirected.
• Currently, the redirected serial port is not accessible from Windows Terminal Servers. RDP serial port
redirection will be supported in future ThinLinc releases.
• The redirection is handled by processes called cyclades-ser-cli. It writes debugging information
to $TLSESSIONDATA/ttyS0.log. and $TLSESSIONDATA/ttyS1.log. These processes will
automatically terminate when the session terminates.
• Applications that uses the ioctl TIOCMGET are not supported yet.
12.3. Using Sound Device Redirection
12.3.1. Introduction
With ThinLinc, it is possible to access the client’s sound device from the terminal servers. This means
that you can run sound applications on the terminal servers and listen to the sound through the client’s
sound device and speakers. Input devices such as microphones can also be used.
12.3.2. Requirements
• EsounD client libraries to support applications with native EsounD support.
• esddsp to support OSS applications via EsounD.
• PulseAudio client libraries to support applications with native PulseAudio support and the ALSA
plug-in. ThinLinc supports version 0.9 of PulseAudio.
• padsp to support OSS applications via PulseAudio.
• alsa-plugins, version 1.0.12 or later, to support ALSA applications via PulseAudio.
12.3.3. Using sound redirection with UNIX applications
ThinLinc can support sound redirection for almost all applications, provided that the correct libraries and
utilities are installed on the ThinLinc server.
12.3.3.1. EsounD applications
All applications that can communicate using the EsounD protocol will work automatically in ThinLinc.
Most modern multimedia applications support EsounD, meaning that the only required work is to make
sure they use EsounD by default. Unfortunately, EsounD does not work well for users running multiple
ThinLinc sessions.
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