linux-kernel - Re: [regression] Re: [ 049/149] rtc: Disable the alarm in the hardware (v2)

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Date:	Tue, 04 Dec 2012 11:34:38 +0100
From:	Heinz Wiesinger <HMWiesinger@....at>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Jonathan Nieder <jrnieder@...il.com>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Rabin Vincent <rabin.vincent@...ricsson.com>,
	Janne Boman <janne.m.boman@...il.com>,
	rtc-linux@...glegroups.com
Subject: Re: [regression] Re: [ 049/149] rtc: Disable the alarm in the hardware (v2)

On Monday 03 December 2012 15:14:12 you wrote:
> On 11/05/2012 02:55 PM, Heinz Wiesinger wrote:
> > On Monday 05 November 2012 11:13:31 Greg KH wrote:
> >> On Mon, Nov 05, 2012 at 01:11:18AM -0800, Jonathan Nieder wrote:
> >>> Hi,
> >>> 
> >>> In March, Greg KH wrote:
> >>>> 3.2-stable review patch.  If anyone has any objections, please let me
> >>>> know.
> >>> 
> >>> Sorry, I'm a little late.  This seems to be causing spurious wakeups
> >>> after shutdown on some systems just like v1 did. :/
> >>> 
> >>> Janne Boman reports[1], using an HP EliteBook 8530w:
> >>> | I'm unable to shutdown my system via normal means. The system
> >>> | completes the shutdown process, all hardware lights are off, but then
> >>> | somehow it restarts.
> >>> 
> >>> Based on a quick web search, Heinz Wiesinger, using the same model,
> >>> 
> >>> ran into the same problem and bisected it to this patch:
> >>>    https://bugzilla.kernel.org/show_bug.cgi?id=44261
> >>> 
> >>> Janne confirmed the same by testing kernels closely based on 3.2.13
> >>> and 3.2.14 --- 3.2.13 shut down fine, while on 3.2.14 "shutdown -h
> >>> now" behaved roughly speaking like "reboot".  A kernel close to 3.6.4
> >>> was also affected.
> >> 
> >> So is 3.6.6 still and issue?  How about 3.7-rc4?  3.4.18?  Figuring out
> >> if this is still an issue in Linus's tree would be the best thing to do
> >> first.
> > 
> > I checked 3.7-rc4 and the issue is still there. Should I still test the
> > other versions as well? I can do so but it might take a bit.
> > 
> > If you need anything else, I'll be happy to help wherever I can.
> 
> Hey Heinz,
>    Sorry for being slow to respond to this, I was on leave when it
> arrived, and it got buried under other items.
> 
> This is peculiar.  I'm guessing something quirky with your hardware is
> causing the alarm irq to trigger shortly after we supposedly disable it.
> Could you send me your dmesg and kernel config?
> 
> After that I'll likely have to send you some debugging instructions
> (commenting out various lines) to try to figure out what exactly is
> triggering it.
> 
> Sorry for the trouble!

Hey John,

Don't worry, I know how it is to be busy.

For the dmesg/kernel config is it fine if I send you the one from 3.7-rc4 or 
should I update to a more recent version?

I've also now seen this behaviour on another notebook with completely different 
hardware (Asus VX1). I can send you dmesg output from that one too if you 
want. Kernel config should be almost identical, but it's running 3.2.29 still.

Grs,
Heinz
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