Incomplete shutdown on some LTSP clients (shutdown hangs/freezes)
Nicholas Skaggs
nicholas.skaggs at canonical.com
Mon Aug 27 16:06:45 UTC 2012
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
> <mailto: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
> <mailto: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.
>
>
>
>
>
>
>
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> --
> https://wiki.ubuntu.com/phillw
>
>
>
>
> --
> https://wiki.ubuntu.com/phillw
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