Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932587Ab2J3LF3 (ORCPT ); Tue, 30 Oct 2012 07:05:29 -0400 Received: from frost.carfax.org.uk ([85.119.82.111]:46449 "EHLO frost.carfax.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759267Ab2J3LF2 (ORCPT ); Tue, 30 Oct 2012 07:05:28 -0400 Date: Tue, 30 Oct 2012 11:05:20 +0000 From: Hugo Mills To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Linus Torvalds , Linux PM list , Greg Kroah-Hartman Subject: Re: Linux 3.7-rc3 Message-ID: <20121030110520.GH5042@carfax.org.uk> Mail-Followup-To: Hugo Mills , "Rafael J. Wysocki" , Linux Kernel Mailing List , Linus Torvalds , Linux PM list , Greg Kroah-Hartman References: <26004880.qboZkUVCy9@vostro.rjw.lan> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="cW+P/jduATWpL925" Content-Disposition: inline In-Reply-To: <26004880.qboZkUVCy9@vostro.rjw.lan> X-GPG-Fingerprint: 8C59 86C7 81F3 93FE BB02 DDB1 20AC B3BE 515C 238D X-GPG-Key: 515C238D X-Parrot: It is no more. It has joined the choir invisible. X-IRC-Nicks: darksatanic darkersatanic darkling darkthing User-Agent: Mutt/1.5.21 (2010-09-15) X-frost.carfax.org.uk-Spam-Score: 0.0 (/) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3968 Lines: 88 --cW+P/jduATWpL925 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Oct 30, 2012 at 01:10:32AM +0100, Rafael J. Wysocki wrote: > On Sunday, October 28, 2012 12:59:49 PM Linus Torvalds wrote: > > It's been a week, time for -rc3! > > > > Nothing particularly stands out here. Lots of small fixes, exemplified > > by the series of memory leak fixes in usb serial drivers. Just a lot > > of random stuff.. > > > > Most of it is drivers (all over: drm, wireless, staging, usb, sound), > > but there's a few filesystem updates (nfs, btrfs, ext4), arch updates > > (arm, x86 and m68k) and just random stuff. Shortlog appended. > > Unfortunately, s2disk is broken with this one and previous -rc. In the > majority of cases it just hangs the machine during hibernation, although > sometimes it returns to user space reporting freezing problems, suspicions > RCU usage and similar stuff, pretty much without any useful debug information. > > I'm quite confident that v3.6 was OK (and -stable based on that too), so > it most likely is a recent regression. The in-kernel hibernation > (ie. "echo disk > /sys/power/state") works no problem. So does suspend to > RAM on my test boxes. > > So far I have been able to reproduce this 100% of the time on two machines > with Intel CPUs and graphics driven by i915. I _suspect_ that this may be > related to VT switching, because s2disk does some ugly things in that area > which are not done by the in-kernel code. Dunno. I've had this symptom on my laptop (Thinkpad Edge 13, Intel graphics & CPU; I can get details when I get back home in about 8 hours), but only with 3.7-rc2. It was definitely working in 3.6, and seems to be OK in 3.7-rc3, although I've only tried two cycles of that last night. When I did suspend to disk, I get a blank screen (but clearly with backlight still on), and a blinking text-mode cursor in the top left. I left it for half an hour once, and nothing changed, so I'm fairly sure it was properly hung. I've not seen it return to user space with errors at all -- just the hang. > Anyway, it looks like nothing short of bisection is going to help debug this, > but I'm afraid I won't have the time to bisect within the next two weeks, so if > anyone can reproduce this issue and will be able to bisect it, please help > (openSUSE/Tumbleweed users anyone?). I can try to bisect the 3.6 -> 3.7-rc2 failure, if that helps? But as I said, I've got it working on -rc3, so I may not have the same problem. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- UNIX: Spanish manufacturer of fire extinguishers. --- --cW+P/jduATWpL925 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIVAwUBUI+0b79z9OVl50rAAQJmkQ//aS4J+v5dx7uI/rwZdthqxRqzxYGlpBaa 0XbvI0RCwglKIwd16W04MwUNB7yy3But7gDDwSZFKKJciBS/530VYLbwFDDLP2H6 /IUXzglsaNAXLSkzK6zEqwPDti5JBeq5rh+izmukQHAuhVU4kSOqUnMwB2xRWbsn 3zbtqsaj8VCL2N+OHF7QC6aJCp9uZeepdyGlboACPWz/PAp2oFq0yZmhmlnrpASf 8755nTM14VnMpuiq/mrgaSvf2kJ3pdx80dhMOgyg9Gr+s7EzOG/j6uDWLCOO2Rsw JqtIqiScIyTeVIxKWkZ7vhl1s7qIKPGQhghTcH53+wAOc1l9EoWh9/LCCRAhVqVx BLQFT97ZLVnKTYbnq5siYQUvQ1VKJiAh9j5/uJAQtsBIxIPG271vgkoKp9mX0/ti CDvp95+l2gBjPa6MDl0N1CT9OLtvWM14u63H6y4eYnb0VJxr10ogYgnLVgiKoWn7 y3TOLiY9VJ7+nrFNGB1HQVtQSQhn9jrg5RLq4xTVWCnPZHsyBwhy/Nt/mJ8uo7Nh uAiaOmMPh6WXzeoTiEHvRRMZ+jObbNbci4nVUOAw7LvRTlmyz87hijgCzCWMMSES chf7Z/5X2VN1tF45Rd5pNMZq97slViBq/wtl/KYn7GF7yElyubv40cpgxfNF9bVP Bpz0HwdSxTo= =A/Lc -----END PGP SIGNATURE----- --cW+P/jduATWpL925-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/