linux-kernel - Re: Help with debugging intermittent crash on resume from hibernation

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Date:	Fri, 17 Apr 2015 20:15:19 -0700
From:	Nikolaus Rath <Nikolaus@...h.org>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
CC:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>
Subject: Re: Help with debugging intermittent crash on resume from hibernation

On 03/19/2015 08:57 PM, Mike Galbraith wrote:
> (+CC)
> 
> On Thu, 2015-03-19 at 20:21 -0700, Nikolaus Rath wrote:
>> On Mar 13 2015, Nikolaus Rath <Nikolaus@...h.org> wrote:
>>> Hello,
>>>
>>> In about one out of 10 resumes from hibernation, my system resets after
>>> the hibernation image has been loaded. I am hibernating using
>>>
>>> # echo platform > /sys/power/disk
>>> # echo disk > /sys/power/state
>>>
>>> When testing hibernation using
>>>
>>> # echo core > /sys/power/pm_test
>>> # echo platform > /sys/power/disk
>>> # echo disk > /sys/power/state
>>>
>>> I was not able to produce the same failure.
>>>
>>> I then tried attaching a serial console and booted with
>>> console=ttyS0,115200n8 no_console_suspend. For the failed attempt, the
>>> last messages before the reset are:
>> [...]
>>
>> I reproduced the same problem with 4.0.0-rc3. Is there anything I can do
>> to get more debugging information?

I also found that blacklisting the nouveau module seems to dramatically
reduce the occurence of this problem (it only happened once since I
blacklisted the module which is probably about ~30 resumes ago).

Is there anything I can do to help debug this issue?


Best,
-Nikolaus

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