linux-kernel - Re: Regression: suspend to ram completely broken since at least 3.13-rc5, works with 3.12.

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Date:	Tue, 2 Dec 2014 15:46:15 +0100
From:	Pavel Machek <pavel@....cz>
To:	Volker Armin Hemmann <volkerarmin@...glemail.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Regression: suspend to ram completely broken since at least
 3.13-rc5, works with 3.12.

Hi!

> with kernel 3.12.X with X tested up to .23 suspend to ram works
> flawlessly. My machine suspends quickly and wakes up reliably, giving me
> uptimes measured in weeks.
> 
> Every kernel I tried between 3.13.0-rc5 and 3.16.7 on the other hand
> shows this behaviour:
> 
> IF suspend works it takes ages. Video blanks quickly, harddisks are
> turned off, then it is stuck for a long time (more minute than tens of
> seconds), and at some point suspends.
> 
> Afterwards there is a 50% chance it will wake up. In that case: nothing
> in dmesg.
> If it does not wake up on pressing any button, I have to press power
> button for a nice cold boot.
> 
> Even if it does suspend and resume successfully, it will NOT suspend the
> next time. Never.
> 
> The much more likely failure mode looks like this:
> It will blank video and turn of harddisks and then nothing happens. usb
> dead, ps2 keyboard dead, no harddisk activity, fans are spinning,
> mainboard is powered - and nothing happens. I can turn off or hit reset
> button.
> 
> Of course, after a reboot nothing will show up in the logs.
> 
> So this is a severe regression. Box worked, it stopped working.

Any chance to do a bisect? Any chance to try with minimum drivers?

								Pavel
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