Created attachment 172978 [details] diff between starting X server on client with/without OpenGL enabled If virtualbox-ose-additions 5.0.26 is built with OpenGL support, the X server in the client cannot start. The attached diff compares /var/log/Xorg.0.log (without OpenGL support) to /var/log/Xorg.0.log.old (with OpenGL support): diff =(sed 's/^\[..........\] //' /var/log/Xorg.0.log) =(sed 's/^\[..........\] //' /var/log/Xorg.0.log.old) With the 4.3.38 version, enabling OpenGL support did not prevent starting of the X server. Furthermore, with the 5.0.26 version, issuing the command VBoxManage controlvm 'FreeBSD 10 i386 (v905)' setvideomodehint 1728 972 32 is honored only after logging in to the client machine. If I remember correctly, the same command would already resize the login screen (KDE) with the 4.3.38 version.
I think that this bug is related with https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211320
A commit references this bug: Author: jkim Date: Mon Jul 25 22:34:21 UTC 2016 New revision: 419078 URL: https://svnweb.freebsd.org/changeset/ports/419078 Log: Do not load vboxvideo.ko from vboxguest script. DRI support was removed from the X.Org vboxvideo driver. https://www.virtualbox.org/changeset/59194 PR: 211373 Changes: head/emulators/virtualbox-ose-additions/Makefile
This problem should be fixed in r419078.
Thank you. -- Martin