The console often contains very useful information in the event of a
hard crash, in such situations there's no ability to unblank the console
via keypress because the kernel won't handle the interrupt.
Since CoreOS is a server/cluster operating system, there won't generally
be monitors connected benefitting from a blanked console. Disabling the
blanking altogether allows the frame buffer contents to always be
visible, even when the kernel can't handle keypresses.
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