My two issues are not being able to change video resolutions. I am stuck at 640x480. Also I cannot use the Seamless Windows feature in virtual box as it's greyed out. I am stumped, I can use some of the features such as clipboard sharing and I've even setup folder sharing from Host to Guest. I cannot use the auto resize function when I change the window, can't change resolutions or use seamless windows.
I have installed Guest Additions version
$ modinfo vboxguest
filename: /lib/modules/3.16.0-23-generic/updates/dkms/vboxguest.ko
version: 4.3.14
license: GPL
description: Oracle VM VirtualBox Guest Additions for Linux Module
author: Oracle Corporation
srcversion: 53E0D047D01503FC05EFEB9
alias: pci:v000080EEd0000CAFEsv00000000sd00000000bc*sc*i*
depends:
vermagic: 3.16.0-23-generic SMP mod_unload modversions
Many of the features are working, shared clipboard, shared folders.
$ ps ax | grep -i vbox
1305 ? Sl 0:00 /usr/sbin/VBoxService
1562 ? Sl 0:00 /usr/bin/VBoxClient --clipboard
1570 ? Sl 0:00 /usr/bin/VBoxClient --display
1572 ? Sl 0:00 /usr/bin/VBoxClient --seamless
1577 ? Sl 0:00 /usr/bin/VBoxClient --draganddrop
2124 pts/4 S+ 0:00 grep --color=auto -i vbox
The video module appears to be loaded
$ lsmod | grep vbox
vboxsf 43691 1
vboxvideo 12669 0
vboxguest 260944 6 vboxsf
drm 310919 2 vboxvideo
$ modinfo vboxvideo
filename: /lib/modules/3.16.0-23-generic/updates/dkms/vboxvideo.ko
license: GPL and additional rights
version: 4.3.14
description: Oracle VM VirtualBox Graphics Card
author: Oracle Corporation
srcversion: 819A8212D6CDC4DDED68716
alias: pci:v000080EEd0000BEEFsv*sd*bc*sc*i*
depends: drm
vermagic: 3.16.0-23-generic SMP mod_unload modversions
Xrandr readout
$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 640 x 480, maximum 640 x 480
default connected primary 640x480+0+0 0mm x 0mm
640x480 73.0*
DKMS and generic-linux-headers were installed before installing VBox Additions
$ sudo apt-get install dkms linux-headers-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
dkms is already the newest version.
linux-headers-generic is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.