Incomplete shutdown on some LTSP clients (shutdown hangs/freezes)
Aere Greenway
Aere at Dvorak-Keyboards.com
Wed Aug 29 18:34:47 UTC 2012
All:
I have an HP-Vectra (450 megahertz) machine that doesn't power-down as
part of the shut-down process.
It has been that way for a number of Linux releases (I don't remember
when it started happening).
I have it on a power-strip, and when it gets to a certain point in the
shut-down process (there is an audible queue) I turn off the
power-strip.
This problem is not specific to Lubuntu. It is the same for
Ubuntu-Studio, and Xubuntu.
I don't know if this is the same problem as is being addressed in this
e-mail thread or not.
The system boots okay when the power-strip is turned back on.
- Aere
On Wed, 2012-08-29 at 14:13 -0400, John Hupp wrote:
> I'll add here that when I posted this problem on the LTSP list, here
> was one reply from someone else having the same problem, but noting
> that it worked in 11.10:
>
> "I second this. I'm using LTSP on the server version of Ubuntu 12.04.
> With 11.10, the machines shut off, but not now. They will reboot just
> fine. It happens at least with HP Z210's. We recently upgraded and I
> can't recall if it happens on other machines (and hate to interrupt
> anyone to turn them off)."
>
>
> On 8/27/2012 2:20 PM, John Hupp wrote:
>
> >
> >
> > In reply to my post about this issue on the LTSP mail list, Alkis
> > Georgopoulos referenced that bug report (which he first reported) in
> > reference to my comment about the inelegant and tedious need to
> > click Shutdown 3 times on an LTSP client (not in reference to the
> > shutdown hang). Excerpt from that reply:
> >
> > ME: On the Edubuntu network, all clients have to invoke Shutdown from the desktop and from the login screen. After choosing Shutdown from the desktop (and then presenting a dialog for Shutdown or Restart), it drops back to the login screen, and there one chooses Preferences: Shutdown. [Very tedious, but that's not my real interest in this post. And as a footnote, the server shuts down cleanly after the two clicks on the desktop.]
> > ALKIS: I reported that problem in https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/491940, you can comment there if you want.
> >
> > So if that bug report does not concern the hung-shutdown problem (I couldn't tell from reading the bug report), then there no patch -- not even a very old one -- to test.
> >
> > -------------------
> >
> > But in reference to the shutdown hang, he replied:
> > ME: One other behavior that was of interest to me but that I did not thoroughly document was that even on machines where Shutdown hangs, it
> > seems generally to be the case that Restart does not hang. The machine proceeds smoothly to POST and reboot.
> > ALKIS: The "machine does not power off" problem is related to acpi/kernel. You can verify that it isn't related to ltsp by booting the client with a CD
> > or usb stick. You can report that upstream to the kernel, see https://wiki.ubuntu.com/Bugs/Upstream/kernel for instructions.
> >
> > I confirmed that it is not an LTSP issue by booting one of the
> > affected client machines with a Live CD. Probably due to very
> > low-spec hardware, I didn't have a working pointer to use the
> > Lubuntu Quit button, but Alt-F2: "sudo halt" and Alt-F2: "sudo
> > shutdown -h now" both resulted in the machine shutdown hung at a
> > text screen with the last line being "System halted."
> >
> > So yes, he regards it as an Ubuntu problem, specifically
> > ACPI-related. I looked at the link for reporting upstream to the
> > kernel, but the First Step instructions didn't seem to apply very
> > well to me as a non-programmer. I did, however, send an email
> > reporting my findings to Len Brown, the listed ACPI maintainer.
> > That was this morning and I haven't heard from him yet.
> >
> > ----------------
> >
> > I would be happy to play around with the BIOS Power Management
> > settings on the affected clients if I had some good ideas about what
> > to change.
> >
> > Does it still make sense to go to the trouble of setting up Kubuntu?
> >
> >
> > On 8/27/2012 12:06 PM, Nicholas Skaggs wrote:
> >
> > > Hmm, my first thought was that this appears to be perhaps some
> > > ACPI interaction, specific to the bios of each pc. You might be
> > > able to change some settings in the bios's on the pc to produce
> > > the intended results.
> > >
> > > Reading the bug, perhaps there is something wrong on the software
> > > side here. Since the bug is marked as being in gnome-session, can
> > > you try and see if it affects you if you don't run gnome session?
> > > For instance, does kubuntu exhibit this behavior?
> > >
> > > Short-term you could get a package with the patch in it and test
> > > that. Longer term, helping get a fix in is of course best. I would
> > > likely open a new bug for this after you've narrowed the cause of
> > > what's going on.
> > >
> > > Nicholas
> > >
> > > On 08/25/2012 04:11 PM, Phill Whiteside wrote:
> > >
> > > >
> > > > Hi John,
> > > >
> > > >
> > > >
> > > > it was marked as a "will not fix" [1]. This seems completely
> > > > stupid to me, as the ltsp team agreed the fix.
> > > >
> > > >
> > > > @ nicholas, can you chase this up? ltsp [2] have simply wished
> > > > me luck to get the bug fixed..... It appears that people do not
> > > > consider it a task worth doing?.... wtf...
> > > >
> > > >
> > > > Regards,
> > > >
> > > >
> > > > Phill.
> > > > 1. https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/491940
> > > > 2. https://help.ubuntu.com/community/UbuntuLTSP/
> > > >
> > > >
> > > > On 25 August 2012 20:03, Phill Whiteside <PhillW at ubuntu.com>
> > > > wrote:
> > > >
> > > > Hi John,
> > > >
> > > >
> > > >
> > > > I've asked on the ltsp team. I do not think it is a
> > > > lubuntu issue, nor an edubuntu one, but a generic issue.
> > > >
> > > >
> > > > I have cc'd this to the guy who looks after general QA,
> > > > I'm sure that he will chase it up for you.
> > > >
> > > >
> > > > For your information LTSP are at [1].
> > > >
> > > >
> > > > Regards,
> > > >
> > > >
> > > > Phill.
> > > > 1. https://help.ubuntu.com/community/UbuntuLTSP/
> > > >
> > > >
> > > > On 25 August 2012 19:31, John Hupp
> > > > <lubuntu at prpcompany.com> wrote:
> > > >
> > > > On my Lubuntu and Edubuntu 12.04 LTSP test
> > > > networks, I find that some clients do not shut
> > > > down completely.
> > > >
> > > >
> > > > On the Lubuntu network, one eMachine client
> > > > stops at a black-and-white text screen that
> > > > says:
> > > > Ubuntu 12.04
> > > > .... * Asking all remaining processes to
> > > > terminate ...
> > > > [255.161402] SysRq : Power off
> > > > [255.173722] Power down.
> > > >
> > > > [OK]
> > > > [255.280060[ SysRq : Power Off
> > > > [255.280220] Power down.
> > > > * All processes ended within 1 seconds ....
> > > > [OK]
> > > > A simple press of the power button does not turn
> > > > off the machine at that point. I have to press
> > > > and hold it 5 seconds or so.
> > > >
> > > > Also on the Lubuntu network, an HP stops at the
> > > > same screen, but a simple press of the power
> > > > button turns it off.
> > > >
> > > > A Dell on the Lubuntu networks shuts off cleanly
> > > > and completely within a few seconds.
> > > >
> > > > ---------------------
> > > >
> > > > On the Edubuntu network, all clients have to
> > > > invoke Shutdown from the desktop and from the
> > > > login screen. After choosing Shutdown from the
> > > > desktop (and then presenting a dialog for
> > > > Shutdown or Restart), it drops back to the login
> > > > screen, and there one chooses Preferences:
> > > > Shutdown. [Very tedious, but that's not my real
> > > > interest in this post. And as a footnote, the
> > > > server shuts down cleanly after the two clicks
> > > > on the desktop.
> > > >
> > > > But regarding specific client machine behavior
> > > > on the Edubuntu network, the above eMachine
> > > > hangs at a black screen after Preferences:
> > > > Shutdown from the login screen. I forgot to
> > > > make a note of whether a simple press of the
> > > > power button shuts it off from here, or whether
> > > > a press-and-hold was required as it was on the
> > > > Lubuntu net.
> > > >
> > > > The above HP hangs at a white screen after
> > > > Preferences: Shutdown from the login screen. A
> > > > simple press of the power button shuts it off
> > > > from here.
> > > >
> > > > The above Dell shuts down cleanly after
> > > > Preferences: Shutdown from the login screen.
> > > >
> > > > ---------------------
> > > >
> > > > One other behavior that was of interest to me
> > > > but that I did not thoroughly document was that
> > > > even on machines where Shutdown hangs, it seems
> > > > generally to be the case that Restart does not
> > > > hang. The machine proceeds smoothly to POST and
> > > > reboot.
> > > >
> > > > ---------------------
> > > >
> > > > So I am wondering if I can get all the clients
> > > > to shut down cleanly via the interface Shutdown
> > > > commands.
> > > >
> > > > If not, is there a script that will produce a
> > > > clean shutdown?
> > > >
> > > > Or failing that, can I insert a splash screen at
> > > > the end of the shutdown process something like
> > > > Windows 95/98 used on machines where it could
> > > > not execute a complete shutdown automatically?
> > > > (The screen said something like "It is now safe
> > > > to turn off your computer.")
> > > >
> > > > Speaking of Windows 95/98's shutdown process, I
> > > > recall that the issue had to do with power
> > > > management drivers not fully supporting the
> > > > hardware on some motherboards, or not finding
> > > > the hardware that power management did fully
> > > > support. But beyond that, it was possible to
> > > > not-install/uninstall/disable power management
> > > > on machines that did support full shutdown, then
> > > > install/reinstall/re-enable power management but
> > > > not recover the ability to do a full shutdown.
> > > > So it wasn't always just a question of supported
> > > > hardware.
> > > >
> > > > Also regarding Win 9x, that splash screen may
> > > > have been an integrated part of all shutdowns.
> > > > I recall seeing it flash on-screen for a split
> > > > second even on machines that were on their way
> > > > to a full automatic shutdown.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Lubuntu-users mailing list
> > > > Lubuntu-users at lists.ubuntu.com
> > > > Modify settings or unsubscribe at:
> > > > https://lists.ubuntu.com/mailman/listinfo/lubuntu-users
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > https://wiki.ubuntu.com/phillw
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > https://wiki.ubuntu.com/phillw
> > > >
> >
> >
> >
> >
>
>
--
Sincerely,
Aere
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