remove graphical boot

[phillxnet]

Consider removing the default graphical boot and / or the "rhgb quiet" kernel options on the installed system as this only really serves to obscure potentially useful boot information and given Rockstor is intended for headless / appliance use the graphical boot screen introduced by these options is an unnecessary complication and a possible hindrance. This is particularly relevant given Rockstor uses non CentOS default kernels.
@toothandnail in the following forum post suggests not including plymouth on the default install. This results in a text only boot without changing the "rhgb quiet" kernel options and provides basic service level boot reporting.
http://forum.rockstor.com/t/a-couple-of-observations-regarding-installation/863

Removing the "rhgb quiet" options from the kernel boot line give additional boot info on top of that made available from the removal of plymouth.
N.B. I think this will also slightly reduce potential hardware compatibility issues due to removing the complexity of boot re mode setting / switching.
Case in point I have a system here (Dell Vostro 220) that mostly refuses to fully boot when the rhgb option is in place, resulting in no progress beyond:-

[drm:intel_opregion_init [i915]] *ERROR* No ACPI video bus found

with the recent 4.3.3 kernel. Removing the rhgb option or uninstalling plymouth improves boot reliability on this system (there are still outstanding occasional issues but it's a start).

[phillxnet]

Please update the referenced forum thread with progress on this issue.