linux-kernel - Re: Suspend to memory is freezing my machine

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Date:	Sun, 25 May 2008 10:59:52 +0200
From:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: Suspend to memory is freezing my machine

2008/5/24 Rafael J. Wysocki <rjw@...k.pl>:
> On Thursday, 22 of May 2008, Zdenek Kabelac wrote:
>> Hello Rafael
>>
>> 2008/5/4 Rafael J. Wysocki <rjw@...k.pl>:
>> > On Sunday, 4 of May 2008, Zdenek Kabelac wrote:
>> >> Hello
>> >
>> > Hi,
>> >
>> >> With recent 2.6.25 & 2.6.26-rc1 git (around 1 week) I get occasionally
>> >> complete freeze of my T61 during suspend. (dual core, 2GB).
>> >
>> > How reproducible is this?
>> >
>>
>> The problem happens still even with -rc3. Now I've an update:
>>
>> Usually I've to run the machine for couple hours to actually be able
>> to hit this lock.
>> (Usually after a day work when I want to leave)
>>
>> I've also noticed that when I run the suspend after the reboot I
>> usually cannot see the suspend freeze - mostly because either the
>> mashine crashes from other ooops or I do another reboot.
>>
>>
>> >> I'm running kernel with no_console_suspend - but all I can see is
>> >> blinking cursor on an empty screen - thus even when I run kernel with
>> >> most debug options turned on, I can't pass more details so far.  I run
>>
>> I've figured out, it was caused by some weird Fedora setting, so
>> adding  kernel.printk = 8  to sysctl.conf  fixed the issue for me.
>>
>> >> suspend with with SD card in - so maybe some update in the MMC driver
>> >> might be responsible for this ?
>> > (1) The problem occurs without no_console_suspend.
>> > (2) The problem occurs without the SD card.
>>
>> SD card or no_console_suspend option doesn't matter
>>
>> This is what I've seen as the last thing on the screen when deadlock
>> appeared this time:
>> (no SD card inserted)
>>
>> ====
>> Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
>> PM: Entering mem sleep
>> drm card0: class suspend
>> drm_sysfs_suspend
>
> Hm, what kind of graphics adapter is there in your box?
>


After some more checking - I guess this information actually is not
useful at all :(.
It looks like even when the suspend is succesful - the line:
ACPI: PCI interrupt for device 0000:00:02.0 disabled
is alway the last one visible.

 I'll try to get figure out a better way how to invoke the lock.

And my graphics adapter is:
00:02.0 VGA compatible controller: Intel Corporation Mobile
GM965/GL960 Integrated Graphics Controller (rev 0c) (prog-if 00 [VGA
controller])

Zdenek
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