From: Dave Jones <davej@redhat.com>
To: Hugh Dickins <hughd@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: Debugging Thinkpad T430s occasional suspend failure.
Date: Tue, 12 Feb 2013 19:40:59 -0500 [thread overview]
Message-ID: <20130213004059.GA14451@redhat.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1302121549500.890@eggly.anvils>
On Tue, Feb 12, 2013 at 04:26:22PM -0800, Hugh Dickins wrote:
> On Tue, 12 Feb 2013, Dave Jones wrote:
>
> > My Thinkpad T430s suspend/resumes fine most of the time. But every so often
> > (like one in ten times or so), as soon as I suspend, I get a black screen,
> > and a blinking power button.
> >
> > (Note: Not the capslock lights like when we panic, this laptop 'conveniently
> > doesn't have those. This is the light surrounding the power button, which afaik
> > isn't even OS controlled, so maybe we're dying somewhere in SMI/BIOS land?)
>
> Me too on T420s, except that is blessed with a blinking CapsLk.
>
> It's so erratic (though I think I see more failures than you do: I'd say
> a quick resume never fails, but an overnight resume fails half the time):
> I'm afraid I didn't have the patience to embark on pm_trace at all.
Sounds like yours successfully suspends all the time though ?
For me, as soon as I shut the lid, the moon light starts flashing indicating failure.
That said, we saw that I was failing on the resume path after a failed suspend,
so it could still be the same problem.
> I did try to bisect it during the -rc5 week. I'm not sure, but I have
> no record of seeing it on -rc1 or -rc2, but definitely saw it on -rc3.
> So I tried bisecting between -rc2 and -rc3, persisting for a day if it
> looked good; but the bisection didn't seem to be converging anywhere
> likely when -rc6 came out, and I switched to see if -rc6 solved it.
>
> I had no problem with -rc6; but with -rc7 it happens more than ever.
> Though still not on "quick" resumes, the kind you want to do when
> bisecting.
so I can hit this pretty quickly with this..
while [ 1 ];
do
rtcwake -s 5 -m no ; pm-suspend
done
Which should make it bisectable at least..
> Sharing these anecdotes in case they match or diverge from your
> experience and others, and might help towards finding the cause.
> Not-to-be-trusted bisection log appended: of course the bads are
> reliable, but perhaps none of the goods.
I didn't have this laptop pre 3.8rc, so I've not had a 'good' reference,
pretty sure I saw it during rc1 though, so I might have to go back further
a version or two.
Dave
next prev parent reply other threads:[~2013-02-13 0:41 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-12 19:39 Debugging Thinkpad T430s occasional suspend failure Dave Jones
2013-02-12 20:13 ` Linus Torvalds
2013-02-13 0:26 ` Hugh Dickins
2013-02-13 0:40 ` Dave Jones [this message]
2013-02-13 0:56 ` Hugh Dickins
2013-02-13 4:16 ` Dave Jones
2013-02-13 5:37 ` Hugh Dickins
2013-02-13 19:34 ` Dave Jones
2013-02-13 19:56 ` Linus Torvalds
2013-02-13 20:53 ` Dave Jones
2013-02-16 20:54 ` Paul E. McKenney
2013-02-15 1:15 ` Dave Jones
2013-02-15 2:09 ` Linus Torvalds
2013-02-15 15:50 ` Ingo Molnar
2013-02-15 22:33 ` Dave Jones
2013-02-15 17:44 ` Paul E. McKenney
2013-02-15 18:34 ` Linus Torvalds
2013-02-15 18:35 ` Linus Torvalds
2013-02-15 18:50 ` Linus Torvalds
2013-02-16 19:25 ` Paul E. McKenney
2013-02-16 19:46 ` Linus Torvalds
2013-02-16 21:07 ` Paul E. McKenney
2013-02-16 21:53 ` H. Peter Anvin
2013-02-17 22:49 ` H. Peter Anvin
2013-02-18 8:41 ` Ingo Molnar
2013-02-19 8:50 ` Paul E. McKenney
2013-02-19 8:56 ` Ingo Molnar
2013-02-17 15:11 ` Frederic Weisbecker
2013-02-17 17:32 ` Linus Torvalds
2013-02-17 18:17 ` Frederic Weisbecker
2013-02-17 20:58 ` Frederic Weisbecker
2013-02-17 21:02 ` Frederic Weisbecker
2013-02-18 15:53 ` Frederic Weisbecker
2013-02-18 18:12 ` Linus Torvalds
2013-02-19 10:08 ` Frederic Weisbecker
2013-02-18 19:58 ` Thomas Gleixner
2013-02-19 10:38 ` Frederic Weisbecker
2013-02-19 10:44 ` Thomas Gleixner
2013-02-15 2:09 ` Hugh Dickins
2013-02-15 2:15 ` Linus Torvalds
2013-02-16 21:45 ` Hugh Dickins
2013-02-16 23:02 ` Linus Torvalds
2013-02-17 0:01 ` Hugh Dickins
2013-02-17 2:21 ` Hugh Dickins
2013-02-17 13:38 ` Daniel Vetter
2013-02-17 14:54 ` Daniel Vetter
2013-02-17 16:31 ` Hugh Dickins
2013-02-17 17:28 ` Daniel Vetter
2013-02-13 2:17 ` Dave Jones
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