From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Nieder Subject: Re: [3.0? -> 3.1.6 regression] Inspiron 1090: Panic on power event (Doubled AC adapter) Date: Sun, 4 Mar 2012 19:11:21 -0600 Message-ID: <20120305011120.GA29786@burratino> References: <20120110165850.GA3015@zod.bos.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-iy0-f174.google.com ([209.85.210.174]:50867 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755260Ab2CEBLc convert rfc822-to-8bit (ORCPT ); Sun, 4 Mar 2012 20:11:32 -0500 Received: by mail-iy0-f174.google.com with SMTP id z16so4890651iag.19 for ; Sun, 04 Mar 2012 17:11:32 -0800 (PST) Content-Disposition: inline In-Reply-To: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Bjorn Helgaas Cc: Josh Boyer , linux-acpi@vger.kernel.org, kernel-team@fedoraproject.org, Zhang Rui , Mark Langsdorf , Giovanni Biscuolo Hi ACPI folks, Bjorn Helgaas wrote: > On Tue, Jan 10, 2012 at 9:59 AM, Josh Boyer wrot= e: >> We've had a report [1] from a user that the 3.1.6 kernel panics if t= hey >> plug or unplug their machine. =C2=A0The oops seems to come from an i= ssue >> somewhere in the acpi notification stack. =C2=A0The relevant backtra= ce >> functions are (transcribed from a jpeg): >> >> acpi_ac_notify >> acpi_device_notify >> acpi_ev_notify_dispatch >> acpi_os_execute_deferred > > Images 1 & 2 from the bugzilla also show kobject_uevent(), so my gues= s > is the problem is in the ACPI ac driver, e.g., maybe > ac->charger.dev->kobj isn't being initialized correctly, so we blow u= p > when acpi_ac_notify() calls kobject_uevent(). Added cc: for recent a= c > changes. [...] >> [1] https://bugzilla.redhat.com/show_bug.cgi?id=3D772730 More reports: https://bugzilla.kernel.org/show_bug.cgi?id=3D38782 (includes DSDT fix= ) http://bugs.debian.org/661995 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/414541 Dell doesn't take emailed reports re the Inspiron 1090 BIOS so Giovanni Biscuolo (cc-ed) reported it to http://en.community.dell.com/support-forums/laptop/f/3518/t/19439525.a= spx I wonder: - could Linux diagnose the duplicate ACAD in a more helpful way? - is it possible to work around, for example by letting the last AC adaptor win on the Inspiron 1090? - what does Windows do? Hope that helps, Jonathan -- 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