Date: Sun, 13 Oct 2013 13:17:20 +1000 From: yudi v <yudi.tux@gmail.com> To: Ian Smith <smithi@nimnet.asn.au> Cc: freebsd-questions@freebsd.org Subject: Re: Is it possible to suspend to disk with geli+Root on ZFS installation Message-ID: <CACo--msT6Jd_ud0Vnqf9sOBTUj6a4CnyXcfmxFj=rSyrN%2Bf11A@mail.gmail.com> In-Reply-To: <20130930015912.G67367@sola.nimnet.asn.au> References: <mailman.57.1380456002.9869.freebsd-questions@freebsd.org> <20130930015912.G67367@sola.nimnet.asn.au>
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On Mon, Sep 30, 2013 at 2:47 AM, Ian Smith <smithi@nimnet.asn.au> wrote: > In freebsd-questions Digest, Vol 486, Issue 7, Message: 5 > On Sat, 28 Sep 2013 16:25:33 +0200 Roland Smith <rsmith@xs4all.nl> wrote: > > On Fri, Sep 27, 2013 at 05:37:55PM +1000, yudi v wrote: > > > Hi all, > > > > > > Is it possible to suspend to disk (hibernate) when using geli for full disk > > > encryption. > > > > As far as I can tell, FreeBSD doesn't support suspend to disk on all > > architectures. On amd64 the necessary infrastructure doesn't exist, and on > > i386 FPU state is lost, there is no multiprocessor support and some MSRs are > > not restored [1]. > > > > [1]: https://wiki.freebsd.org/SuspendResume > > Roland, sorry, no; you (and that page) are talking about Suspend to RAM, > ACPI state S3. What you've said is correct re Suspend to RAM - though > some running amd64 have achieved some success on some machines lately; > most of the issues are with restoring modern video, backlight and such. > > Those i386 comments don't apply to my Thinkpad T23s, which suspend and > resume, in console mode and X, flawlessly on 9.1-R and properly after > various tweaks on 8.x, 7.x and 6.x - but they're a single core P3-M .. > > I must reiterate, FreeBSD does not support Suspend to Disk (state S4 aka > 'hibernate') on ANY platform, except - perhaps - on machines supporting > S4 in BIOS (hw.acpi.s4bios=1) which are very rarely spotted in the wild. > > > And even suspend to RAM doesn't work on every machine [2]. > > > > [2]: https://wiki.freebsd.org/IdeasPage#Suspend_to_disk > > That page IS about Suspend to Disk - but only as a wishlist idea, as it > has been for many years. Someone did take it on as a Google SoC project > years ago, but nothing ever came of it to my knowledge. > > The last laptop I have that will properly hibernate - ie save RAM and > all state to disk and power off, then reload all RAM and state on power > return - is a 300MHz Compaq Armada 1500C (mfg '98), but using the older > APM BIOS rather than ACPI. (It's still running, 24/7/365 since 2002 :) > > cheers, Ian Thanks Ian for clarifying that FreeBSD does not support Suspend to Disk. I just assumed all major distros supported all the suspend states. Now I am looking for a UPS that cleanly shuts down the machine when there is a power outage. I am looking at a APC Power-Saving Back-UPS ES 8 Outlet 700VA 230V AS 3112<http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BE700G-AZ&total_watts=200&tab=features>, anyone know if apcupsd daemon works fine under FreeBSD or should I be looking at Network UPS Tools (NUT). -- Kind regards, Yudi
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