From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751481AbeDZELN (ORCPT ); Thu, 26 Apr 2018 00:11:13 -0400 Received: from mail-ot0-f169.google.com ([74.125.82.169]:39093 "EHLO mail-ot0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750810AbeDZELM (ORCPT ); Thu, 26 Apr 2018 00:11:12 -0400 X-Google-Smtp-Source: AIpwx49rWwx+fCqKQgKgbCKlxUdP9WOT0yc7LLdUg/Ji/vk/4JK0ijePg5ghhaYwtrEm9JHivLLvEA== To: linux-kernel@vger.kernel.org Cc: tytso@mit.edu From: Sultan Alsawaf Subject: Re: Linux messages full of `random: get_random_u32 called from` Message-ID: Date: Wed, 25 Apr 2018 21:11:08 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Detailed information on my system can be found on this bug report I recently worked on: https://bugzilla.kernel.org/show_bug.cgi?id=199463