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

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Message-ID: <b9280675-fe26-da23-2c6b-fce7dcc3e762@intel.com>
Date:   Mon, 31 Jul 2017 18:44:20 +0300
From:   Tomi Sarvela <tomi.p.sarvela@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Martin Peres <martin.peres@...ux.intel.com>,
        jeffy.chen@...k-chips.com, linux-kernel@...r.kernel.org
Subject: Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

On 31/07/17 18:06, Thomas Gleixner wrote:
> On Mon, 31 Jul 2017, Tomi Sarvela wrote:
>> On 31/07/17 10:45, Thomas Gleixner wrote:
>>> On Mon, 31 Jul 2017, Tomi Sarvela wrote:
>>>> On 28/07/17 19:26, Thomas Gleixner wrote:
>>>>> Did you change anything else compared to the tests before ?
>>>>
>>>> I did check that the problem persisted in linus-HEAD before testing your
>>>> patch. The testing was done in order (reading from console logs I happen
>>>> to
>>>> still have in one window):
>>>
>>> What I still do not understand is why this would affect the suspend path in
>>> any way.
>>>
>>> Can you remove the previous patch and apply the one below. If it resumes,
>>> please provide the data from the trace buffer again.
>>
>> No such luck. ELK hangs in the suspend-test with earlier patch removed, this
>> added. Checked again that the power-led is on, no serial output.
> 
> Can you please remove the patch. And try the following:
> 
> # echo N > /sys/module/printk/parameters/console_suspend
> 
> # echo mem > /sys/power/state
> 
> and log the output of the serial console. That way we might get a clue
> where it gets stuck.

I'm afraid it hangs right away. No response from SSH, no output to serial.

Tomi
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