Pretty sure this is a vbox issue, trusty has been patchy with vbox here - have you installed guest additions?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1292059 Title: Xubuntu 14.04 screenresolution = 640*480 after installation Status in “linux” package in Ubuntu: Incomplete Bug description: Fresh installation in a virtual machine (Virtual Box) with a screen- resolution of 1024*768. After installation the resolution is set to 640*480. One can't change the resolution ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: ubiquity (not installed) ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6 Uname: Linux 3.13.0-17-generic i686 ApportVersion: 2.13.3-0ubuntu1 Architecture: i386 CurrentDesktop: XFCE Date: Thu Mar 13 17:15:42 2014 InstallCmdLine: file=/cdrom/preseed/xubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity InstallationDate: Installed on 2014-03-13 (0 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20140313) SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1292059/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp