From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751763AbeDZFBE (ORCPT ); Thu, 26 Apr 2018 01:01:04 -0400 Received: from imap.thunk.org ([74.207.234.97]:60278 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750760AbeDZFA6 (ORCPT ); Thu, 26 Apr 2018 01:00:58 -0400 Date: Thu, 26 Apr 2018 01:00:56 -0400 From: "Theodore Y. Ts'o" To: Sultan Alsawaf Cc: linux-kernel@vger.kernel.org, Jann Horn Subject: Re: Linux messages full of `random: get_random_u32 called from` Message-ID: <20180426050056.GF18803@thunk.org> Mail-Followup-To: "Theodore Y. Ts'o" , Sultan Alsawaf , linux-kernel@vger.kernel.org, Jann Horn References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.5 (2018-04-13) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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