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

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Date:	Sat, 08 Dec 2012 12:10:39 +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 Tuesday 04 December 2012 10:34:39 John Stultz wrote:
> On 12/04/2012 02:34 AM, Heinz Wiesinger wrote:
> > 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?
> 
> 3.7-rc4 is fine.
> 
> > 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.
> Yea, dmesg there would be good as well.

Hey John,

Sorry for the delay. I was quite busy this week myself.
Please find the kernel config and dmesg output attached.

Grs,
Heinz
View attachment ".config" of type "text/x-mpsub" (120852 bytes)

View attachment "callisto.dmesg" of type "text/plain" (74431 bytes)

View attachment "darkstar.dmesg" of type "text/plain" (65049 bytes)

Download attachment "signature.asc" of type "application/pgp-signature" (231 bytes)