linux-kernel - Re: ACPI Regression on Dell E1501

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Message-ID: <467C1569.2010306@canonical.com>
Date:	Fri, 22 Jun 2007 12:31:05 -0600
From:	Tim Gardner <tim.gardner@...onical.com>
To:	trenn@...e.de
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Chuck Ebbert <cebbert@...hat.com>, lenb@...nel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	ebiederm@...ssion.com
Subject: Re: ACPI Regression on Dell E1501

Thomas Renninger wrote:
> On Fri, 2007-06-22 at 07:18 -0600, Tim Gardner wrote:
>> Tim Gardner wrote:
>>> Thomas Gleixner wrote:
>>>> On Thu, 2007-06-21 at 17:47 -0400, Chuck Ebbert wrote:
>>>>> On 06/21/2007 05:04 PM, Tim Gardner wrote:
>>>>>> Hi,
>>>>>>
>>>>>> Commit e9e2cdb412412326c4827fc78ba27f410d837e6e breaks boot on a Dell
>>>>>> E1501 unless 'acpi=off' is specified (also tried nolapic and nohpet but
>>>>>> it made no substantive difference). This laptop is an 'AMD Turion(tm) 64
>>>>>> X2 Mobile Technology TL-50' CPU, but its booting 32 bit SMP (make
>>>>>> defconfig). No kernel built after this commit works for this platform.
>>>>>>
>>>>>> There is no crash output, it just wedges after 'NET: Registered protocol
>>>>>> family 2'.
>>>>>>
>>>>>> How can I debug this problem?
>>>>> That'll be fun.
>>>>>
>>>>> That's:
>>>>>
>>>>> 	[PATCH] clockevents: i386 drivers
>>>>>
>>>>> [Author cc: added]
>>>> I'm going nuts on this. 
>>>>
>>>> Tim, 
>>>>
>>>> 1.) are you booting a 32bit or a 64 bit kernel ?
>>>>
>>>> 2.) Can you please try 2.6.22-rc5 + 
>>>> http://www.tglx.de/projects/hrtimers/2.6.22-rc5/patch-2.6.22-rc5-hrt1.patch
>>>> 	whether this makes any difference 
>>>>
>>>> Thanks,
>>>>
>>>> 	tglx
>>>>
>>> Thomas,
>>>
>>> Your patch (large though it is) did not make any outward difference. As
>>> usual, adding 'acpi=off' allows it to boot.
>>>
>>> rtg
>> Perhaps I was too hasty. Adding 'acpi=off' did not allow it to boot. The
>> IDE drive was detected, but I did not see any partitions detected.
>> Eventually it dropped to the initrd shell when it could not find a root
>> filesystem. Anyways, this is likely a side issue.
> 
> I am seeing the same with an ACER F5000.
> 
> pci=nomsi let the machine still boot.
> 
> I tried a bit and I think I got it, for me it's this one:
> 
> commit 78b7611c4a1e3ff008abc4751b566cb533d68f3d
> Author: Eric W. Biederman <ebiederm@...ssion.com>
> Date:   Fri Jun 1 00:46:33 2007 -0700
> 
> My problem: The laptop does not have an serial output device, I try to
> set up a fire wire console, but might have cable/HW problems.
> 
> What else can I do to help?
> What do you need?
> 
> Thanks,
> 
>    Thomas
> 

pci=nomsi has no effect, nor does CONFIG_SMP. Furthermore, I positively
confirmed that this is the offending commit. If I reset HEAD to the
commit just prior, then everything works OK.

rtg
-- 
Tim Gardner tim.gardner@...ntu.com
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