Public bug reported: If there is disk space less than 8,7 GB, the installer just displays an icon without a message and the continue button is grayed out. I found out the solution on AskUbuntu: http://askubuntu.com/q/295059
The issue is explained here very well: http://askubuntu.com/a/873236 Copying here: I also had this problem installing Kubuntu 16.10 in VirtualBox. Unlike shao.lo, for me dynamic vs. fixed .vdi didn't matter. For me the problem was that the virtual disk was too small, but the installer doesn't give any useful error report about this. There is an icon on the screen indicating the issue, but it's so abstracted as to be meaningless: it looks like a trashcan with a line through it, with no accompanying explanation. (If the disk is adequate it will be a checkbox.) I created a new VDI of appropriate size (>8.6GB, apparently) and it worked. I was only able to discover this by running "ubiquity -d" from a terminal and examining the output in /var/log/installer/debug. ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: udisks2 2.1.7-1ubuntu1 ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0 Uname: Linux 4.8.0-22-generic x86_64 ApportVersion: 2.20.3-0ubuntu8 Architecture: amd64 CasperVersion: 1.379 CustomUdevRuleFiles: 60-ssd-scheduler.rules Date: Tue Jan 31 13:25:42 2017 ExecutablePath: /usr/lib/udisks2/udisksd LiveMediaBuild: Kubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: innotek GmbH VirtualBox ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) ProcKernelCmdLine: file=/cdrom/preseed/hostname.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity SourcePackage: udisks2 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH ** Affects: udisks2 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug yakkety -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1660621 Title: "Continue" button is grayed out after Language step during installation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks2/+bug/1660621/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs