Same error here after upgrading from 16.10 to 17.04:
$ cat Xorg.1.log | grep EE
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 102.177] (EE) Failed to load module "vboxvideo" (module does not exist, 0)
[ 102.178] (EE) Failed to load module "vboxvideo" (module does not exist, 0)
[ 102.180] (EE) open /dev/dri/card0: No such file or directory
[ 102.180] (EE) open /dev/dri/card0: No such file or directory
[ 102.180] (EE) open /dev/fb0: Permission denied
[ 102.180] (EE) open /dev/fb0: Permission denied
[ 102.180] (EE) Screen 0 deleted because of no matching config section.
[ 102.180] (EE) Screen 0 deleted because of no matching config section.
[ 102.205] (EE) VESA(0): Cannot read int vect
[ 102.205] (EE) Screen(s) found, but none have a usable configuration.
[ 102.205] (EE)
[ 102.205] (EE) no screens found(EE)
[ 102.206] (EE)
[ 102.206] (EE) Please also check the log file at
"/home/millan/.local/share/xorg/Xorg.1.log" for additional information.
[ 102.206] (EE)
[ 102.217] (EE) Server terminated with error (1). Closing log file.
However, I have installed Kubuntu 17.04 in a new virtual machine and it
works perfectly.
** Attachment added: "Xorg.1.log"
https://bugs.launchpad.net/ubuntu/+source/virtualbox-guest-additions/+bug/1683043/+attachment/4865521/+files/Xorg.1.log
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https://bugs.launchpad.net/bugs/1683043
Title:
Black screen after installing virtualbox-guest-x11
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