linux-kernel - Re: Suspend and resume on ASUS Laptops

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Message-ID: <4ED796AF.60606@linux.vnet.ibm.com>
Date:	Thu, 01 Dec 2011 20:31:03 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	Oliver Neukum <oneukum@...e.de>
CC:	Steven Rostedt <rostedt@...dmis.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-pm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: Suspend and resume on ASUS Laptops

On 12/01/2011 08:08 PM, Oliver Neukum wrote:

> Am Donnerstag, 1. Dezember 2011, 15:28:54 schrieb Steven Rostedt:
>> On Thu, 2011-12-01 at 12:48 +0100, Oliver Neukum wrote:
>>
>>> What errors are seen in the kernel log?
>>
>> Without the script, I don't see any errors. Is there some debug thing
>> you want me to do? There's no error messages but the system just hangs
>> on suspend. It never makes it to the suspend state. The only way out of
>> it is to press and hold the power button for 10 seconds to force a hard
>> reboot.
> 
> I see. I thought the system just refuses to enter S3/4. That it hangs was
> new to me. Has there been a mail thread about this problem already?
> If not, what is the last thing you see if you go to S3 after you booted
> with no_console_suspend on the kernel command line?
> 


Hi Steven,
Since without the script your system refuses to suspend, you could also use the
'pm_test' framework (documented in Documentation/power/basic-pm-debugging.txt)
to find out more about the failing step when suspend is attempted without using
the script. Trying 'echo devices > /sys/power/pm_test' might be helpful in your
case.

Regards,
Srivatsa S. Bhat
IBM Linux Technology Center

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