linux-kernel - Re: 2.6.29-rc1 does not resume on Lenove T61

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Date:	Mon, 12 Jan 2009 13:50:12 +0100
From:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Maciej Rutecki" <maciej.rutecki@...il.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Henrique de Moraes Holschuh" <hmh@....eng.br>
Subject: Re: 2.6.29-rc1 does not resume on Lenove T61

2009/1/12 Rafael J. Wysocki <rjw@...k.pl>:
> On Monday 12 January 2009, Zdenek Kabelac wrote:
>> 2009/1/12 Rafael J. Wysocki <rjw@...k.pl>:
>> > On Sunday 11 January 2009, Zdenek Kabelac wrote:
>> >> 2009/1/11 Maciej Rutecki <maciej.rutecki@...il.com>:
>> >> > 2009/1/11 Zdenek Kabelac <zdenek.kabelac@...il.com>:
>> >> >> Hi
>> >> >>
>> >> >> I've booted and tested 2.6.29-rc1 (c59765042f53a79a7a65585042ff463b69cb248c)
>> >> >>
>> >> >> I've observed that suspend is unusable - it goes to sleep - the sleep
>> >> >> LED is on. After few secs system turns on back itself - and stays in
>> >> >> some frozen state
>> >> >
>> >> > A have similar situation, one difference: I get blank screen during
>> >> > resume from suspend to ram. Also sometimes, like You, system turns on
>> >> > back itself.
>> >> >
>> >>
>> >> So it looks like reverting this commit:
>> >>
>> >> http://marc.info/?l=linux-kernel&m=123140019117968&w=4
>> >> (6fd9086a518d4f14213a32fe6c9ac17fabebbc1e)
>> >> (which is already a tracked regression)
>> >> fixes the problem with auto-resume
>> >>
>> >> But the problem with deadlock in the resume phase is still there.
>> >
>> > Please check if unloading all of the USB controller modules before suspend
>> > helps.
>>
>> I've booted to single mode without   usbcore module (thus any load of
>> other usb modules fails)
>> (removed from initramdisk as well)
>>
>> This time the resume stops with these 3 lines (I'm using
>> no_console_suspend kernel option):
>>
>> ....
>> thinkpad_acpi  thinkpad_acpi: EARLY resume
>> thinkpad_hwmon  thinkpad_hwmon: EARLY resume
>> Enabling non-boot CPUs...
>
> So it seems we have broken CPU hotplug again.
>
> Does disabling/enabling CPU1 using
> /sys/devices/system/cpu/cpu1/online work?
>
> If it does, please boot with 'no_console_suspend' in the kernel command line,
> run:
>
> # echo core > /sys/power/pm_test
> # echo 8 > /proc/sys/kernel/printk
> # echo mem > /sys/power/state
>
> and see what happens (you need to have PM_DEBUG set in the kernel .config).
>
> Please send dmesg output generated right after the above (if it works).


I've taken from another Ingo's thread the idea to revert patch:

7503bfbae89eba07b46441a5d1594647f6b8ab7d


With this patch reverted and  o/e/uhci_hcd & usbhid modules removed
before pm-suspend
(usbcore could be loaded, I've not trace which one of those usb
modules makes the problem)
my system resumes properl again.

Zdenek

PS: I'll do the above 'echo' trace later (being busy right now).
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