I have tried manually running `/usr/bin/VBoxClient-all` and `/usr/bin/VBoxClient`.
The "vboxclient.desktop" does exist in both "/etc/xdg/autostart" and "/usr/share/Autostart". I also added the desktop file to "~/.kde/Autostart" (previous forum post suggestion).
$ cat /usr/share/autostart/vboxclient.desktop
[Desktop Entry]
Type=Application
Encoding=UTF-8
Version=1.0
Name=vboxclient
Name[C]=vboxclient
Comment[C]=VirtualBox User Session Services
Comment=VirtualBox User Session Services
Comment[it]=Servizi di sessione utente di VirtualBox
Comment[pl]=Usługi sesji użytkownika VirtualBox
Exec=/usr/bin/VBoxClient-all
X-GNOME-Autostart-enabled=true
X-KDE-autostart-after=panel
Here is a snippet of my /var/log/Xorg.0.log
(II) VBoxVideo(0): Splitting WC range: base: 0xe0000000, size: 0x1200000
(WW) VBoxVideo(0): Failed to set up write-combining range (0xe1000000,0x200000)
(WW) VBoxVideo(0): Failed to set up write-combining range (0xe0000000,0x1200000)
(II) VBoxVideo(0): Requested monitor count: 1
I have these xorg and kernel packages installed:
$ rpm -qa | egrep -i 'xorg|kernel' | sort | paste - - - - | column -t
kernel-2.6.18-194.el5 kernel-2.6.18-404.el5 kernel-2.6.18-406.el5 kernel-devel-2.6.18-404.el5
kernel-devel-2.6.18-406.el5 kernel-headers-2.6.18-406.el5 xorg-x11-apps-7.1-4.0.1.el5 xorg-x11-drivers-7.1-4.2.el5
xorg-x11-drv-acecad-1.1.0-2.1 xorg-x11-drv-aiptek-1.0.1-2 xorg-x11-drv-ast-0.89.9-1.el5 xorg-x11-drv-ati-6.6.3-3.35.el5
xorg-x11-drv-calcomp-1.1.0-1.1 xorg-x11-drv-cirrus-1.1.0-2.fc6 xorg-x11-drv-citron-2.2.0-1.1 xorg-x11-drv-digitaledge-1.1.0-1.1
xorg-x11-drv-dmc-1.1.0-2 xorg-x11-drv-dummy-0.2.0-2.1 xorg-x11-drv-dynapro-1.1.0-2 xorg-x11-drv-elo2300-1.1.0-1.1
xorg-x11-drv-elographics-1.1.0-1.1 xorg-x11-drv-evdev-1.0.0.5-5.el5 xorg-x11-drv-fbdev-0.3.0-3 xorg-x11-drv-fpit-1.1.0-1.1
xorg-x11-drv-hyperpen-1.1.0-2 xorg-x11-drv-i810-1.6.5-9.40.el5 xorg-x11-drv-jamstudio-1.1.0-1.1 xorg-x11-drv-joystick-1.1.0-1.1
xorg-x11-drv-keyboard-1.1.0-3 xorg-x11-drv-magellan-1.1.0-1.1 xorg-x11-drv-magictouch-1.0.0.5-2.1 xorg-x11-drv-mga-1.4.13-5.el5
xorg-x11-drv-microtouch-1.1.0-1.1 xorg-x11-drv-mouse-1.1.1-1.1 xorg-x11-drv-mutouch-1.1.0-3 xorg-x11-drv-nv-2.1.15-4.el5
xorg-x11-drv-palmax-1.1.0-1.1 xorg-x11-drv-penmount-1.1.0-2.1 xorg-x11-drv-qxl-0.0.12-2.el5 xorg-x11-drv-s3-0.4.1-2.1
xorg-x11-drv-s3virge-1.9.1-2.1 xorg-x11-drv-savage-2.1.1-5.fc6 xorg-x11-drv-siliconmotion-1.4.1-2.1 xorg-x11-drv-sis-0.9.1-7.3.el5_7.1
xorg-x11-drv-sisusb-0.8.1-4.1 xorg-x11-drv-spaceorb-1.1.0-1.1 xorg-x11-drv-summa-1.1.0-1.1 xorg-x11-drv-tdfx-1.2.1-3.1
xorg-x11-drv-tek4957-1.1.0-1.1 xorg-x11-drv-trident-1.2.1-3.fc6 xorg-x11-drv-ur98-1.1.0-1.1 xorg-x11-drv-vesa-1.3.0-8.3.el5
xorg-x11-drv-vga-4.1.0-2.1 xorg-x11-drv-via-0.2.1-9 xorg-x11-drv-vmmouse-12.4.0-2.1 xorg-x11-drv-vmware-10.13.0-2.1
xorg-x11-drv-void-1.1.0-3.1 xorg-x11-drv-voodoo-1.1.0-3.1 xorg-x11-filesystem-7.1-2.fc6 xorg-x11-fonts-100dpi-7.1-2.1.el5
xorg-x11-fonts-75dpi-7.1-2.1.el5 xorg-x11-fonts-base-7.1-2.1.el5 xorg-x11-fonts-ISO8859-1-100dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-14-100dpi-7.1-2.1.el5
xorg-x11-fonts-ISO8859-14-75dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-15-100dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-15-75dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-1-75dpi-7.1-2.1.el5
xorg-x11-fonts-ISO8859-2-100dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-2-75dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-9-100dpi-7.1-2.1.el5 xorg-x11-fonts-ISO8859-9-75dpi-7.1-2.1.el5
xorg-x11-fonts-misc-7.1-2.1.el5 xorg-x11-fonts-truetype-7.1-2.1.el5 xorg-x11-fonts-Type1-7.1-2.1.el5 xorg-x11-font-utils-7.1-3
xorg-x11-proto-devel-7.1-13.el5 xorg-x11-server-utils-7.1-5.el5_6.2 xorg-x11-server-Xnest-1.1.1-48.107.el5.centos xorg-x11-server-Xorg-1.1.1-48.107.el5.centos
xorg-x11-server-Xvfb-1.1.1-48.107.el5.centos xorg-x11-twm-1.0.1-3.1 xorg-x11-util-macros-1.0.2-4.fc6 xorg-x11-utils-7.1-2.fc6
xorg-x11-xauth-1.0.1-2.1 xorg-x11-xbitmaps-1.0.1-4.1 xorg-x11-xfs-1.0.2-5.el5_6.1 xorg-x11-xinit-1.0.2-15.el5
xorg-x11-xkb-utils-1.0.2-2.1
I am using VirtualBox Versions 5.0.2(localhost) and 4.3.28 (another host)
Any help would be greatly appreciated