Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

[Andrew Morton]

(cc linux-acpi)

On Thu, 27 May 2010 12:08:48 -0600 Jeffrey Merkey <jeffmerkey@gmail.com> wrote:

> 2.6.34 causes a hard system lockup when the screen blanking activates
> for more than 10 minutes with low battery power.  Also misreports
> battery level as "battery broken at 14%" when the battery is fully
> charged.  Does not occur with 2.6.28 but 2.6.33 also seems to do it as
> well.  software debugging tools useless as the keyboard does not
> respond.
> 

Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

[Len Brown]

Jeff,
Please attach the output of acpidump here:

https://bugzilla.kernel.org/show_bug.cgi?id=16136

thanks,
Len Brown, Intel Open Source Technology Center

Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

[Jeffrey Merkey]

Len,

I am having trouble getting a trace of this because its down hard to
reproduce.  The reason is the lockup happens before I log into the
laptop.  i.e. I boot 2.6.34 and if I let the laptop just sit there is
happens.  If I log in and start doing work on it, it does not seem to
happen.  It's related to using the laptop on battery mode with the
charger removed.  I have a 2U appliance setup I am working on today
and this frees up the laptop to try to reproduce this.  The flaky
battery power misreporting was in fact accurate.  The battery in that
laptop is 6 years old and does have low power.  I am certain the
lockup if related though.  I will try to reproduce today and setup the
trace to run after boot.  I have had it sitting there for an  hour and
it has not reoccurred.  Let me try through today and if I cannot
reproduce, close the bug.

Jeff

On Wed, Jun 9, 2010 at 4:21 PM, Len Brown <lenb@kernel.org> wrote:
> Jeff,
> Please attach the output of acpidump here:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=16136
>
> thanks,
> Len Brown, Intel Open Source Technology Center
>

Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

[Len Brown]

On Fri, 11 Jun 2010, Jeffrey Merkey wrote:

> Len,
> 
> I am having trouble getting a trace of this because its down hard to
> reproduce.  The reason is the lockup happens before I log into the
> laptop.  i.e. I boot 2.6.34 and if I let the laptop just sit there is
> happens.  If I log in and start doing work on it, it does not seem to
> happen.  It's related to using the laptop on battery mode with the
> charger removed.  I have a 2U appliance setup I am working on today
> and this frees up the laptop to try to reproduce this.  The flaky
> battery power misreporting was in fact accurate.  The battery in that
> laptop is 6 years old and does have low power.  I am certain the
> lockup if related though.  I will try to reproduce today and setup the
> trace to run after boot.  I have had it sitting there for an  hour and
> it has not reoccurred.  Let me try through today and if I cannot
> reproduce, close the bug.

Good to know, Jeff.

One possibility is that the old battery is confusing
the embedded controller -- possibly exposing a firmware bug.
The EC, in turn, is fully capable of hanging the OS.

If you *can* reproduce it, it may be interesting to bisect
recent changes to drivers/acpi/ec.c

Also, if you can reproduce it, it would be good to verify
that the problem occurs only when the battery driver is loaded.

thanks,
-Len

> > Please attach the output of acpidump here:
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=16136

We could still use this output -- note that you can
capture it at any time, independent of the failure,
and independent of the kernel -- as it is simply
a copy of the tables that the BIOS is exporting to Linux.

thanks,
-Len Brown, Intel Open Source Technology Center

Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

[Jeffrey Merkey]

On Fri, Jun 11, 2010 at 11:07 AM, Len Brown <lenb@kernel.org> wrote:
> On Fri, 11 Jun 2010, Jeffrey Merkey wrote:
>
>> Len,
>>
>> I am having trouble getting a trace of this because its down hard to
>> reproduce.  The reason is the lockup happens before I log into the
>> laptop.  i.e. I boot 2.6.34 and if I let the laptop just sit there is
>> happens.  If I log in and start doing work on it, it does not seem to
>> happen.  It's related to using the laptop on battery mode with the
>> charger removed.  I have a 2U appliance setup I am working on today
>> and this frees up the laptop to try to reproduce this.  The flaky
>> battery power misreporting was in fact accurate.  The battery in that
>> laptop is 6 years old and does have low power.  I am certain the
>> lockup if related though.  I will try to reproduce today and setup the
>> trace to run after boot.  I have had it sitting there for an  hour and
>> it has not reoccurred.  Let me try through today and if I cannot
>> reproduce, close the bug.
>
> Good to know, Jeff.
>
> One possibility is that the old battery is confusing
> the embedded controller -- possibly exposing a firmware bug.
> The EC, in turn, is fully capable of hanging the OS.
>
> If you *can* reproduce it, it may be interesting to bisect
> recent changes to drivers/acpi/ec.c
>
> Also, if you can reproduce it, it would be good to verify
> that the problem occurs only when the battery driver is loaded.
>
> thanks,
> -Len
>
>> > Please attach the output of acpidump here:
>> >
>> > https://bugzilla.kernel.org/show_bug.cgi?id=16136
>
> We could still use this output -- note that you can
> capture it at any time, independent of the failure,
> and independent of the kernel -- as it is simply
> a copy of the tables that the BIOS is exporting to Linux.
>
> thanks,
> -Len Brown, Intel Open Source Technology Center
>

I can tell you for certain it does only happen when the battery driver
is loaded.  Still has not ocurred.  Just rebooted it 15 minutes ago --
trying again.

Jeff
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Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop

[Jeffrey Merkey]

Not Reliably Reproducable.  Looks like a firmware/hardware problem
with an old laptop.

Jeff

On Fri, Jun 11, 2010 at 3:19 PM, Jeffrey Merkey <jeffmerkey@gmail.com> wrote:
> On Fri, Jun 11, 2010 at 11:07 AM, Len Brown <lenb@kernel.org> wrote:
>> On Fri, 11 Jun 2010, Jeffrey Merkey wrote:
>>
>>> Len,
>>>
>>> I am having trouble getting a trace of this because its down hard to
>>> reproduce.  The reason is the lockup happens before I log into the
>>> laptop.  i.e. I boot 2.6.34 and if I let the laptop just sit there is
>>> happens.  If I log in and start doing work on it, it does not seem to
>>> happen.  It's related to using the laptop on battery mode with the
>>> charger removed.  I have a 2U appliance setup I am working on today
>>> and this frees up the laptop to try to reproduce this.  The flaky
>>> battery power misreporting was in fact accurate.  The battery in that
>>> laptop is 6 years old and does have low power.  I am certain the
>>> lockup if related though.  I will try to reproduce today and setup the
>>> trace to run after boot.  I have had it sitting there for an  hour and
>>> it has not reoccurred.  Let me try through today and if I cannot
>>> reproduce, close the bug.
>>
>> Good to know, Jeff.
>>
>> One possibility is that the old battery is confusing
>> the embedded controller -- possibly exposing a firmware bug.
>> The EC, in turn, is fully capable of hanging the OS.
>>
>> If you *can* reproduce it, it may be interesting to bisect
>> recent changes to drivers/acpi/ec.c
>>
>> Also, if you can reproduce it, it would be good to verify
>> that the problem occurs only when the battery driver is loaded.
>>
>> thanks,
>> -Len
>>
>>> > Please attach the output of acpidump here:
>>> >
>>> > https://bugzilla.kernel.org/show_bug.cgi?id=16136
>>
>> We could still use this output -- note that you can
>> capture it at any time, independent of the failure,
>> and independent of the kernel -- as it is simply
>> a copy of the tables that the BIOS is exporting to Linux.
>>
>> thanks,
>> -Len Brown, Intel Open Source Technology Center
>>
>
> I can tell you for certain it does only happen when the battery driver
> is loaded.  Still has not ocurred.  Just rebooted it 15 minutes ago --
> trying again.
>
> Jeff
>
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