linux-kernel - Re: SwSusp to disk doesn't work

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Date:	Sun, 11 Mar 2007 19:26:19 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	linux-kernel@...r.kernel.org, Pavel Machek <pavel@....cz>
Subject: Re: SwSusp to disk doesn't work - Try 2

On Sunday, 11 March 2007 19:08, Thomas Meyer wrote:
> Suspend to disk doesn't work on my laptop.
> 
> The suspend seems to hang while enabling the non-boot cpus again.
> 
> with platform = "test" and state = "disk" i get this:
> "
> [cut]
> acpi device:02: freeze
> video video:00: freeze
> acpi device:01: freeze
> acpi PNP0C02:00: freeze
> pci_root PNP0A08:00: freeze
> button PNP0C0E:00: freeze
> button PNP0C0C:00: freeze
> acpi APP0002:00: freeze
> button PNP0C0D:00: freeze
> ac ACPI0003:00: freeze
> acpi device:00: freeze
> processor ACPI0007:01: freeze
> processor ACPI0007:00: freeze
> button button_power:00: freeze
> acpi acpi_system:00: freeze
> Disabling non-boot CPUs ...
> CPU 1 is now offline
> SMP alternatives: switching to UP code
> PM: Removing info for No Bus:cpu1
> PM: Removing info for No Bus:msr1
> CPU1 is down
> swsusp debug: Waiting for 5 seconds.
> Enabling non-boot CPUs ...
> 
> ----> Here the process hangs. But a fortunate coincidence showed me that 
> an acpi event continues the process (pressing the power off button a few 
> times... (2x - 4x)  ).

Hm, interesting.

> SMP alternatives: switching to SMP code
> Booting processor 1/1 eip 3000
> CPU 1 irqstacks, hard=c0389000 soft=c0387000
> Initializing CPU#1
> Calibrating delay using timer specific routine.. 3663.73 BogoMIPS 
> (lpj=6103576)
> CPU: After generic identify, caps: bfe9fbff 00100000 00000000 00000000 
> 0000c1a9 00000000 00000000
> monitor/mwait feature present.
> CPU: L1 I cache: 32K, L1 D cache: 32K
> CPU: L2 cache: 2048K
> CPU: Physical Processor ID: 0
> CPU: Processor Core ID: 1
> CPU: After all inits, caps: bfe9fbff 00100000 00000000 00002940 0000c1a9 
> 00000000 00000000
> Intel machine check architecture supported.
> Intel machine check reporting enabled on CPU#1.
> CPU1: Intel Genuine Intel(R) CPU           T2400  @ 1.83GHz stepping 08
> PM: Adding info for No Bus:cpu1
> PM: Adding info for No Bus:msr1
> CPU1 is up
> acpi acpi_system:00: resuming
> button button_power:00: resuming
> processor ACPI0007:00: resuming
> processor ACPI0007:01: resuming
> acpi device:00: resuming
> ac ACPI0003:00: resuming
> button PNP0C0D:00: resuming
> acpi APP0002:00: resuming
> button PNP0C0C:00: resuming
> button PNP0C0E:00: resuming
> pci_root PNP0A08:00: resuming
> "
> 
> Any ideas?

Could you please put some printk()s in kernel/cpu.c:_cpu_up() to see where
it gets stuck?  I bet one of the notifiers goes to sleep (cpufreq, maybe).

Greetings,
Rafael
-- 
If you don't have the time to read,
you don't have the time or the tools to write.
		- Stephen King
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