After executing sh /usr/local/freeswitch/skypopen/skype-clients- startup-dir/start_skype_clients.sh I can see that the skype client process is absent # ps -aux: root 4353 0.0 0.3 126244 3092 ? Ss 10:10 0:00 /usr/sbin/crond -n pulse 30755 0.0 0.6 296340 6480 ? S<l 10:54 0:00 /usr/bin/pulseaudio --system=true --daemonize=true --log-level=info --log-target=sys root 30908 0.0 1.2 113140 12556 pts/0 S 11:01 0:00 /usr/bin/Xvfb :101 -ac -nolisten tcp -screen 0 640x480x8 root 30967 1.5 5.4 884616 55260 ? S<l 11:11 0:19 freeswitch -nc root 31041 0.0 0.0 0 0 ? S 11:22 0:00 [kworker/0:0] root 31048 0.0 0.0 0 0 ? R 11:28 0:00 [kworker/0:2] root 31054 0.0 0.3 151072 3964 pts/0 R+ 11:33 0:00 ps -aux I tried several times to kill process /usr/bin/Xvfb and start skype client again but failed. I rebooted a system. I deleted completely directories: /tmp /usr/local/freeswitch/skypopen/skype-clients-symlinks-dir /usr/local/freeswitch/skypopen/skype-clients-configuration-dir /usr/local/freeswitch/skypopen/skype-clients-startup-dir and executed the "install.pl" script cd /usr/src/freeswitch/src/mod/endpoints/mod_skypopen/install ./install.pl However a skype client don't start. Of course, mod_skypopen also failed: 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1542 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1542 ][none ][N/A,N/A] globals.dialplan=XML 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1539 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1539 ][none ][N/A,N/A] globals.context=default 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1545 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1545 ][none ][N/A,N/A] globals.destination=5000 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1548 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1548 ][none ][N/A,N/A] globals.skype_user=xenia.obolenskya 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1551 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1551 ][none ][N/A,N/A] globals.report_incoming_chatmessages=false 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1557 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1557 ][none ][N/A,N/A] globals.write_silence_when_idle=false 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1560 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1560 ][none ][N/A,N/A] globals.setsockopt=true 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1653 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1653 ][none ][N/A,N/A] interface_id=1 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1664 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1664 ][none ][N/A,N/A] name=skype101 2017-11-17 11:13:08.741603 [DEBUG] mod_skypopen.c:1670 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1670 ][none ][N/A,N/A] Initialized XInitThreads! 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1693 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1693 ][skype101 ][IDLE,IDLE] CONFIGURING interface_id=1 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1730 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1730 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].name=skype101 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1733 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1733 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].context=default 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1736 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1736 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].dialplan=XML 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1739 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1739 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].destination=5000 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1742 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1742 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].X11_display=:101 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1745 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1745 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].skype_user=xenia.obolenskaya 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1748 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1748 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].report_incoming_chatmessages=0 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1751 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1751 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].silent_mode=0 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1754 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1754 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].write_silence_when_idle=0 2017-11-17 11:13:08.761605 [DEBUG] mod_skypopen.c:1757 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1757 ][skype101 ][IDLE,IDLE] interface_id=1 globals.SKYPOPEN_INTERFACES[ interface_id].setsockopt=1 2017-11-17 11:13:08.761605 [WARNING] mod_skypopen.c:1759 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [WARNINGA 1759 ][skype101 ][IDLE,IDLE] STARTING interface_id=1 2017-11-17 11:13:08.761605 [DEBUG] skypopen_protocol.c:1869 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1869 ][skype101 ][IDLE,IDLE] X Display ':101' opened 2017-11-17 11:13:08.761605 [ERR] skypopen_protocol.c:1686 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [ERRORA 1686 ][none ][N/A,N/A] Received error code 5 from X Server 2017-11-17 11:13:08.761605 [ERR] skypopen_protocol.c:1687 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [ERRORA 1687 ][none ][N/A,N/A] Display error for 1, :101 2017-11-17 11:13:08.761605 [ERR] skypopen_protocol.c:1884 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [ERRORA 1884 ][skype101 ][DEAD,IDLE] Fatal display error for :101 - successed to jump 2017-11-17 11:13:08.761605 [WARNING] skypopen_protocol.c:1910 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [WARNINGA 1910 ][skype101 ][DEAD,IDLE] Removing skype interface #skype101 2017-11-17 11:13:08.841659 [DEBUG] mod_skypopen.c:1422 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1422 ][skype101 ][DEAD,IDLE] In skypopen_signaling_thread_func: started, p=0x7fa2cccb1d70 2017-11-17 11:13:08.841659 [DEBUG] mod_skypopen.c:1506 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 1506 ][skype101 ][DEAD,IDLE] EXITING 2017-11-17 11:13:08.961605 [NOTICE] mod_skypopen.c:1788 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [NOTICA 1788 ][skype101 ][DEAD,IDLE] WAITING roughly 10 seconds to find a running Skype client and connect to its SKYPE API for interface_id=1 2017-11-17 11:13:18.981616 [ERR] mod_skypopen.c:1801 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [ERRORA 1801 ][skype101 ][DEAD,IDLE] Failed to connect to a SKYPE API for interface_id=1, no SKYPE client running, please (re)start Skype client. Skypopen exiting 2017-11-17 11:13:18.981616 [DEBUG] mod_skypopen.c:421 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 421 ][skype101 ][DEAD,IDLE] interface 'skype101' STILL console 2017-11-17 11:13:18.981616 [DEBUG] mod_skypopen.c:431 [1.6.19+git~20171019T182535Z~f51b5d2dce~64bit ] [DEBUG_SKYPE 431 ][ ][IDLE,IDLE] interface 'skype101' deleted successfully 2017-11-17 11:13:19.961652 [CRIT] switch_loadable_module.c:1522 Error Loading module /usr/lib/freeswitch/mod/mod_skypopen.so **Module load routine returned an error**