how to make i3 fill the screen
I'm trying to use i3 in a VM, but for some reason I can't make it fill the screen: after startx, i3 comes up in 1024x768 mode (with black bands on both sides), I can then change the actual screen resolution with "xrandr -x 1920x1200", but the i3 window continues to cover only a 1024x768 area in the top left of the screen.
I've also adjusted the grub setting to set the console in 1920x1200 mode, but as soon as I start xorg, it falls back to 1024x768. There's no xorg.conf file, as far as I can tell.
Stock Ubuntu 15.04, minimal server intall + i3 + xorg, running under Parallels (with tools installed) on Mac OSX 10.10.4.
Any tips/pointers would be very much appreciated!
-jcw
Have you installed Guest Additions? https://www.virtualbox.org/manual/ch04.html#idp46785384343968