It seems that there has been some change in the X11 permission. This change prevents starting gparted when sued to root. As debian and ubuntu have remove gksu people need to handle the permissions themselves. The following command sequence will allow you to run `gparted`.
When the curses console of QEMU does not become visible, then you can try the following settings in the virtual machine: /etc/default/grub should contain GRUB_CMDLINE_LINUX=”console=tty0 console=ttyS0″ /etc/modprobe.d/bochs_drm.conf should contain install bochs_drm /bin/true