From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933442Ab3GPP7S (ORCPT ); Tue, 16 Jul 2013 11:59:18 -0400 Received: from b.ns.miles-group.at ([95.130.255.144]:1660 "EHLO radon.swed.at" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932441Ab3GPP7O (ORCPT ); Tue, 16 Jul 2013 11:59:14 -0400 Message-ID: <51E56DCB.3040108@nod.at> Date: Tue, 16 Jul 2013 17:59:07 +0200 From: Richard Weinberger User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130620 Thunderbird/17.0.7 MIME-Version: 1.0 To: Ramkumar Ramachandra CC: LKML , Jeff Dike , Al Viro Subject: Re: [QUERY] User-Mode Linux and /dev/tty* References: In-Reply-To: X-Enigmail-Version: 1.5.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! Am 16.07.2013 17:54, schrieb Ramkumar Ramachandra: > Hi, > > So, I was trying to boot User-Mode Linux with a modern rootfs with > systemd on it, and found that it wouldn't present me a prompt. I dug > further, and found out that getty is not able to open /dev/tty1; I > then tried the console-getty.service (which uses /dev/console), and it > worked. The reason it doesn't work out of the box is that systemd is > not able to figure out whether or not a virtual console subsystem is > present: /dev/tty0 is present for some reason (although I'm not sure > it's a virtual console), and this confuses systemd. > > So, my question is: does um Linux have a virtual console subsystem? > If so, then why doesn't it seem to work? If not, why does /dev/tty0 > exist? UML does not have CONFIG_VT. But recent systemd versions can deal with that. Thanks, //richard