Hi,<div> </div><div>I've had what appears to be very similar behaviour reported on a VM, again we await some guidance on how & where to file this. I'm probably as guilty as most in that I use 'force shut-down' from my virtual machine manager to issue a 'force quit' with a shrug and blindly accepting that is just the way it happens with virtual machines.... </div> <div> </div><div>BUT if the same thing is affecting 'real' kit, then there is a bug which needs addressing.</div><div> </div><div>Just my thoughts on the matter.</div><div> </div><div>Regards,</div><div> </div><div>Phill. <div class="gmail_quote">On 2 September 2012 20:27, John Hupp <<a href="mailto:lubuntu@prpcompany.com" target="_blank">lubuntu@prpcompany.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div bgcolor="#FFFFFF" text="#000000"> So is it time to file a bug report on this? Trying to go through channels as instructed at <a href="https://wiki.ubuntu.com/Bugs/Upstream/kernel" target="_blank">https://wiki.ubuntu.com/Bugs/Upstream/kernel</a>, I emailed the ACPI maintainer (<a href="mailto:lenb@kernel.org" target="_blank">lenb@kernel.org</a>) on 8/27, but have had no response. Of course, my report format was not as specified there, but as a non-dev and Linux newbie I did the best I could to be thorough. If it is time for that, I would appreciate it if someone who has the knowledge and experience to do a proper job of it would take the helm. Although if it turns out that documenting the problem such as I have done in these email posts is sufficient, then I'm willing. As I see it, the problem is now summarized: - On some machines running Ubuntu/Edubuntu/Lubuntu/Kubuntu 12.04 either as standalone desktops or as LTSP clients, the shutdown process hangs either at a console window (the right term?) after reporting "System halted," or "SysRq : Power Off ..... Power down," or else at a blank all-black or all-white screen. Which particular way it hangs is dependent on the distro and on the machine hardware. - Since the problem also occurs with Kubuntu, it does not seem to be Gnome-specific. - At least on one such machine so affected, no change of BIOS settings ("ACPI Aware O/S: No/Yes" or "Power Management/APM: Disabled/Enabled") affected the behavior. - Other users report that shutdown worked properly in some previous version of *buntu, but the reports vary some on which version last worked. I would add my understanding that <a href="http://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/491940" target="_blank">http://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/491940</a> does not refer to this problem, but instead refers somehow to the current tedious shutdown behavior where one has to click Main Menu: Shutdown, then from a dialog window click Shutdown again, and then from the login window click Preferences: Shutdown. <div><div class="h5"> <div>On 9/2/2012 2:51 PM, John Hupp wrote: </div> <blockquote type="cite"> I downloaded Kubuntu 12.04 and made a Live DVD. On one of the clients with the shutdown problem, I booted the Live DVD. I didn't have a working pointer (500 MHz Celeron and 256 MB, so maybe not enough resources), but the "sudo poweroff" command from a console window resulted in shutdown hanging after "System halted" was reported onscreen, and I had to force the machine off. I take it that this confirms it is not a Gnome-specific problem. ---------------------------- I also played with the BIOS Power Control settings. For "ACPI Aware O/S: Yes/No" and "Power Management/APM: Enabled/Disabled." I tried all four permutations of settings and all resulted in the same hung shutdown. There was also "Power Button Function: On/Off," "Suspend Time Out: Enabled/Disabled" and <various devices>: "Monitor/Ignore," but I took those to be irrelevant. <div>On 9/2/2012 1:22 PM, Aere Greenway wrote: </div> <blockquote type="cite"> Nicholas: I don't think Kubuntu would run on a 450 megahertz, 512 RAM machine, though they have improved it this last release, so perhaps I should try it. I do run Xubuntu on it, which has the same problem. Years ago, there was an error message that appeared during shutdown (or boot), stating that the BIOS did not pass the ACPI cutoff (I think it was a date before which they did not rely on ACPI). Ever since then, that machine would not power-down, on every successive Linux release. I used to use Kubuntu on that machine (8.04?) and I think the problem might have been evident back then. - Aere On Mon, 2012-08-27 at 12:06 -0400, Nicholas Skaggs wrote: <blockquote type="CITE"> 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: </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> Hi John, </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> it was marked as a "will not fix" [1]. This seems completely stupid to me, as the ltsp team agreed the fix. </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> @ 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... </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> Regards, </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> Phill. </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> 1. <a href="https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/491940" target="_blank">https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/491940</a> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> 2. <a href="https://help.ubuntu.com/community/UbuntuLTSP/" target="_blank">https://help.ubuntu.com/community/UbuntuLTSP/</a> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> On 25 August 2012 20:03, Phill Whiteside <<a href="mailto:PhillW@ubuntu.com" target="_blank">PhillW@ubuntu.com</a>> wrote: <blockquote> Hi John, </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> I've asked on the ltsp team. I do not think it is a lubuntu issue, nor an edubuntu one, but a generic issue. </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> I have cc'd this to the guy who looks after general QA, I'm sure that he will chase it up for you. </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> For your information LTSP are at [1]. </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> Regards, </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> Phill. </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> 1. <a href="https://help.ubuntu.com/community/UbuntuLTSP/" target="_blank">https://help.ubuntu.com/community/UbuntuLTSP/</a> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> On 25 August 2012 19:31, John Hupp <<a href="mailto:lubuntu@prpcompany.com" target="_blank">lubuntu@prpcompany.com</a>> wrote: </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> On my Lubuntu and Edubuntu 12.04 LTSP test networks, I find that some clients do not shut down completely. </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> 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. </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> -- Lubuntu-users mailing list <a href="mailto:Lubuntu-users@lists.ubuntu.com" target="_blank">Lubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/lubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/lubuntu-users</a> </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> <blockquote> <blockquote> <a href="https://lists.ubuntu.com/mailman/listinfo/lubuntu-users" target="_blank">-- </a> <a href="https://wiki.ubuntu.com/phillw" target="_blank">https://wiki.ubuntu.com/phillw</a> </blockquote> </blockquote> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> </blockquote> </blockquote> <blockquote type="CITE"> <blockquote type="CITE"> -- <a href="https://wiki.ubuntu.com/phillw" target="_blank">https://wiki.ubuntu.com/phillw</a> </blockquote> </blockquote> <table cellpadding="0" cellspacing="0" width="100%"> <tbody> <tr> <td> <pre>-- Sincerely, Aere </pre> </td> </tr> </tbody> </table> <fieldset></fieldset> </blockquote> <fieldset></fieldset> </blockquote> </div></div></div> -- Lubuntu-users mailing list <a href="mailto:Lubuntu-users@lists.ubuntu.com">Lubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/lubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/lubuntu-users <div> </div>-- </a><a href="https://wiki.ubuntu.com/phillw" target="_blank">https://wiki.ubuntu.com/phillw</a> </blockquote></div></div>