From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?iso-8859-1?Q?Niccol=F2_Belli?= Subject: [Dell XPS 13 9343] Random kernel Oops at boot with =?iso-8859-1?Q?"acpi=3Dht",_disappearing_with_"acpi=3Doff"?= Date: Fri, 02 Oct 2015 11:59:38 +0200 Message-ID: <16367d85-fe84-4792-819a-d50a508409ef@linuxsystems.it> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail.linuxsystems.it ([2.119.245.41]:58964 "EHLO mail.linuxsystems.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752015AbbJBKI7 convert rfc822-to-8bit (ORCPT ); Fri, 2 Oct 2015 06:08:59 -0400 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-acpi@vger.kernel.org Hi, This laptop suffers of random kernel hangs at boot: I tested kernel 4.1= =2E8,=20 4.2.1 and 4.3-rc3 and they are all affected. Every time I turn on my laptop I have to boot several times to be able = to=20 reach the sddm login because often I get hangs which prevent the system= to=20 boot. Once booted I don't have any problem anymore, until the next boot= =2E With "acpi=3Doff" the system boots flawlessly, while with "acpi=3Dht" I= still=20 get random hangs, so I guess the problem is in the ACPI table parsing c= ode=20 itself, or perhaps the SMP code. I recompiled kernel 4.3-rc3 with CONFIG_ACPI_DEBUG=3Dy and I attached f= ull=20 log from a serial console, booting with "debug acpi.debug_level=3D0x200= 3"=20 (warn, error and tables debug enabled):=20 https://bugzilla.kernel.org/attachment.cgi?id=3D189041 Distro is Arch Linux. Please let me know if you need further logs. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=3D105251 Niccol=C3=B2 Belli -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html