id summary reporter owner description type status component version resolution keywords cc guest host 15418 guest addtions: Ubuntu 16.04 Server, error message about libXrandr on Guest Additions start-up -> fixed in releases higher than 5.0.20 FranzS "I get an error message ""BoxClient: error while loading shared librarie"" in my syslog: {{{ May 14 16:22:41 fortuna vboxadd[837]: Starting the VirtualBox Guest AdditionsInstalling the Window System drivers May 14 16:22:41 fortuna vboxadd[837]: Could not find the X.Org or XFree86 Window System, skipping. May 14 16:22:41 fortuna vboxadd[837]: /usr/bin/VBoxClient: error while loading shared libraries: libXrandr.so.2: cannot open shared object file: No such file or directory May 14 16:22:41 fortuna vboxadd[837]: ...done. May 14 16:22:41 fortuna systemd[1]: Started vboxadd.service. }}} As I took a closer look i found out that this libXrandr is usually only available in systems that have an X Server. But this is not the case in my Machine which is even detected one row above where it say's ""Could not find the X.Org or XFree86 Window System, skipping."" Therefore i think this is a little bit strange that on the one hand the System detects that there is no X Server and directly afterwards want to use a library that is used for X Servers. Even during the installation it seems to be properly detected that there is no X Server. I did the installation like this: {{{ sudo mount /dev/sr0 /media/cdrom/ sudo apt-get install -y dkms build-essential linux-headers-generic linux-headers-$(uname -r) sudo /media/cdrom/VBoxLinuxAdditions.run --nox11 }}} This was the output, clearly saying that ""Could not find the X.Org or XFree86 Window System, skipping."" But still got the Message in the syslog {{{ Verifying archive integrity... All good. Uncompressing VirtualBox 5.0.20 Guest Additions for Linux............ VirtualBox Guest Additions installer Copying additional installer modules ... Installing additional modules ... Removing existing VirtualBox DKMS kernel modules ...done. Removing existing VirtualBox non-DKMS kernel modules ...done. Building the VirtualBox Guest Additions kernel modules ...done. Doing non-kernel setup of the Guest Additions ...done. Starting the VirtualBox Guest AdditionsInstalling the Window System drivers Could not find the X.Org or XFree86 Window System, skipping. ...done. }}} " defect closed guest additions VirtualBox 5.0.20 fixed X.Org, XFree86, shared libraries, libXrandr, Guest Additions Linux Windows