linux-kernel - Re: Linux messages full of `random: get_random

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Message-ID: <20180426050056.GF18803@thunk.org>
Date:   Thu, 26 Apr 2018 01:00:56 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Sultan Alsawaf <sultanxda@...il.com>
Cc:     linux-kernel@...r.kernel.org, Jann Horn <jannh@...gle.com>
Subject: Re: Linux messages full of `random: get_random_u32 called from`

On Wed, Apr 25, 2018 at 09:11:08PM -0700, Sultan Alsawaf wrote:
> I noticed "systems without sufficient boot randomness" and would like to add to this.
> 
> With the changes to /dev/random going from 4.16.3 to 4.16.4, my low-spec Chromebook does not reach
> the login screen upon boot (it stays stuck on a black screen) until I provide a source of entropy to
> the system via interrupts (e.g., holding down a key on the keyboard for 5 sec or moving my finger
> across the touchpad a lot). After providing a source of entropy for long enough,
> "random: crng init done" prints out in dmesg and the login screen finally pops up.

Thanks for the report!

I assume since you're upgrading your own kernel, you must not be
running Chrome OS on your Acer CB3-431 Chromebook (Edgar).  Are you
running Chromium --- or some Linux distribution on it?

Thanks,

					- Ted