--- VirtualBox-5.2.10.orig/src/VBox/Additions/x11/Installer/98vboxadd-xclient	2018-04-13 17:32:05.000000000 +0100

+++ VirtualBox-5.2.10/src/VBox/Additions/x11/Installer/98vboxadd-xclient	2018-04-22 04:31:42.483190045 +0100

@@ -21,15 +21,9 @@ for i in $HOME/.vboxclient-*.pid; do

     test -w $i || rm -f $i

 done

-if ! test -c /dev/vboxguest 2>/dev/null; then

-   # Do not start if the kernel module is not present.

-   # Execute notify-send in the back-ground to avoid racing with sddm,

-   # as notify-send may wait for sddm to start while it waits for us to exit.

-   notify-send "VBoxClient: the VirtualBox kernel service is not running.  Exiting." &

-elif test -z "${SSH_CONNECTION}"; then

-   # This script can also be triggered by a connection over SSH, which is not

-   # what we had in mind, so we do not start VBoxClient in that case.  We do

-   # not use "exit" here as this script is "source"d, not executed.

+# Do not start if the kernel module is not present; or if this script is

+# triggered by a connection over SSH.

+if [ -c /dev/vboxguest -a -z "${SSH_CONNECTION}" ]; then

   /usr/bin/VBoxClient --clipboard

   /usr/bin/VBoxClient --checkhostversion

   /usr/bin/VBoxClient --display