Eventually after about 5 minutes, screen gets killed and it continues and works;
command line:
[root@ ocsinventory]# ocsinventory-agent --debug --server http://xx.xx
Can't open display
File descriptor 5 (pipe:[114071540]) leaked on pvs invocation. Parent PID 27968: /usr/bin/perl
File descriptor 5 (pipe:[114071540]) leaked on vgs invocation. Parent PID 27968: /usr/bin/perl
File descriptor 5 (pipe:[114071540]) leaked on lvs invocation. Parent PID 27968: /usr/bin/perl
error: Failed to reconnect to the hypervisor
error: no valid connection
error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory
[root@ ocsinventory]#
[Tue Jul 30 09:23:28 2019][debug] Ocsinventory::Agent::Backend::OS::Generic::Screen killed by a timeout.
[Tue Jul 30 09:23:28 2019][debug] Running Ocsinventory::Agent::Backend::OS::Generic::Users
[Tue Jul 30 09:23:28 2019][debug] Running Ocsinventory::Agent::Backend::OS::Linux
[Tue Jul 30 09:23:28 2019][debug] Running Ocsinventory::Agent::Backend::OS::Linux::Archs::i386
[Tue Jul 30 09:23:28 2019][debug] Running Ocsinventory::Agent::Backend::OS::Linux::Archs::i386::CPU
[Tue Jul 30 09:23:28 2019][debug] Running Ocsinventory::Agent::Backend::OS::Linux::Distro::LSB
[Tue Jul 30 09:23:28 2019][debug] Running Ocsinventory::Agent::Backend::OS::Linux::Drives
[Tue Jul 30 09:23:28 2019][debug] - lshal found