Comment # 10 on bug 978424 from Oliver Kurth

Make sure that vmware-user-suid-wrapper has the suid bit set.

FWIW, this is a script that I run inside a guest to test drag/drop and
copy/paste after a fresh build and install of open-vm-tools:

#!/bin/bash

echo "killing vmusr process"
killall vmtoolsd

echo "mounting vmblock-fuse"
sudo modprobe fuse
sudo mkdir -p /var/run/vmblock-fuse
sudo /usr/local/bin/vmware-vmblock-fuse -o
subtype=vmware-vmblock,default_permissions,allow_other /var/run/vmblock-fuse

echo "starting vmtoolsd"
sudo /usr/local/bin/vmtoolsd --background /var/run/vmtoolsd.pid

echo "setting suid bit for vmware-user-suid-wrapper"
sudo chmod u+s /usr/local/bin/vmware-user-suid-wrapper

echo "starting vmusr process"
/usr/local/bin/vmware-user-suid-wrapper