From: Jonathan Nieder <jrnieder@gmail.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Josh Boyer <jwboyer@redhat.com>,
linux-acpi@vger.kernel.org, kernel-team@fedoraproject.org,
Zhang Rui <rui.zhang@intel.com>,
Mark Langsdorf <mark.langsdorf@amd.com>,
Giovanni Biscuolo <g@xelera.eu>
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 [thread overview]
Message-ID: <20120305011120.GA29786@burratino> (raw)
In-Reply-To: <CAErSpo49rG6GFgXk+4JOsBr20QpOOrPGYZhyVsCcYVvuGCY6KA@mail.gmail.com>
Hi ACPI folks,
Bjorn Helgaas wrote:
> On Tue, Jan 10, 2012 at 9:59 AM, Josh Boyer <jwboyer@redhat.com> wrote:
>> We've had a report [1] from a user that the 3.1.6 kernel panics if they
>> plug or unplug their machine. The oops seems to come from an issue
>> somewhere in the acpi notification stack. The relevant backtrace
>> 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 guess
> is the problem is in the ACPI ac driver, e.g., maybe
> ac->charger.dev->kobj isn't being initialized correctly, so we blow up
> when acpi_ac_notify() calls kobject_uevent(). Added cc: for recent ac
> changes.
[...]
>> [1] https://bugzilla.redhat.com/show_bug.cgi?id=772730
More reports:
https://bugzilla.kernel.org/show_bug.cgi?id=38782 (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.aspx
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
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next prev parent reply other threads:[~2012-03-05 1:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-10 16:59 3.1 Panic on power event Josh Boyer
2012-01-10 23:12 ` Bjorn Helgaas
2012-03-05 1:11 ` Jonathan Nieder [this message]
2012-03-05 1:13 ` Inspiron 1090: Panic on power event (Doubled AC adapter) Jonathan Nieder
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