linux-kernel - Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

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Date:   Thu, 27 Jul 2017 10:36:49 +0300
From:   Tomi Sarvela <tomi.p.sarvela@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Martin Peres <martin.peres@...ux.intel.com>
Cc:     jeffy.chen@...k-chips.com, linux-kernel@...r.kernel.org
Subject: Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

On 26/07/17 17:26, Thomas Gleixner wrote:
> On Wed, 26 Jul 2017, Martin Peres wrote:
>> On 25/07/17 10:01, Tomi Sarvela wrote:
>>> On 24/07/17 19:37, Martin Peres wrote:
>>>> On 24/07/17 19:35, Thomas Gleixner wrote:
>>>>> On Mon, 24 Jul 2017, Martin Peres wrote:
>>>>>> On 24/07/17 18:28, Thomas Gleixner wrote:
>>>>>>> Output of 'cat /proc/interrupts' and a description what kind of
>>>>>>> 'old' Intel
>>>>>>> platform that is.
>>>>>>
>>>>>> Sorry, I should have repeated the name outside of just the subject of
>>>>>> the
>>>>>> email. It is an Intel Eagle Lake Core2Duo.
>>>>>
>>>>> I hoped you would give me a little bit more details, but I Gurgled it
>>>>> now. I try to find such a beast and look what's wrong there. If I can't
>>>>> find one, I'll come back with some debug patches.
>>>>
>>>> Ha, sorry!
>>>>
>>>> Here is all the info I have:
>>>>    - Hardware: HP Compaq 8000
>>>>    - CPU: Eagle Lake Core2Duo E7500
>>>
>>> As mentioned, it's HP Compaq 8000 Elite, desktop tower in most basic
>>> configuration: one SATA SSD, 4GB memory and so on. Most recent BIOS from
>>> around 2012, no UEFI.
>>>
>>> If you have proposed fix for the issue, I'll be happy to test them.
>>>
>>> Best regards,
>>
>> Thanks for the information Tomi.
>>
>> Thomas, any update on this? Another user reported the problem:
> 
> Not yet.
> 
>> "I have the same thing on an old cheap laptop.
>> model name      : Intel(R) Core(TM)2 CPU
>> cpu family      : 6
>> model           : 15
>>
>> Previously, this never happened on the kernel series 4.{10,11,12}.
>> After reverted commit bf22ff45bed664 on 4.13-rc2, unfortunately it still hangs
>> when it wakes up.
> 
> So reverting that commit does not help. Does it help on your machine?

Yes. Reverting it does not cause the machine to lock up on resume.

I haven't tested if the machine locks up later on, but at least it 
survives couple of s/r cycles.

Tomi
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