I bought an Acer Chromebook 13 CB5-311-T6R7 (the one with the NVidia Tegra K1 ARM CPU) to run it in a dual-boot configuration with Chrome OS and Ubuntu. I've used a slightly modified version of the modified chrubuntu script from
here to install ubuntu. My version of the scripts and
a writeup of the install procedure can be found
here.
Update 2015-01-20: I have now updated my install script to address the freeze up issue discussed in the comments below. See
my comment for the details of the fix used.
Update 2015-08-28: I have now updated my install script to use the current NVidia "Tegra for Linux" release, Tegra124_Linux_R21.4.0.
