I got similar problems (shutdown hanging, mount:/ is busy) with Ubuntu 14.04 on
a Dell Precision WorkStation 390,
after boot ing dmesg displayed a kernel 'Oops: [#1] SMP', a few lines
below the 'i82975x_edac' is listed:
[7.951808] Oops: [#1] SMP
[7.951943] Modules linked in: i82975x_edac(+) snd edac_core serio_raw
soundcore mac_hid hid_generic usbhid hid ahci firewire_ohci libahci
firewire_core crc_itu_t floppy tg3 ptp pps_core
[7.952012] CPU: 0 PID: 309 Comm: systemd-udevd Not tainted
3.13.0-36-generic #63-Ubuntu
[7.952012] Hardware name: Dell Inc. Precision WorkStation
390/0DN075, BIOS 2.6.0 05/19/2008
[7.952012] task: 88007b988000 ti: 8800796e8000 task.ti:
8800796e8000
[7.952012] RIP: 0010:[a00c97ee] [a00c97ee]
edac_create_sysfs_mci_device+0x23e/0x550 [edac_core]
I blacklisted the i82975x_edac module and voila, the machine shuts down without
problems.
See also my bug:
https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1372006
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Touch seeded packages, which is subscribed to pm-utils in Ubuntu.
https://bugs.launchpad.net/bugs/1263704
Title:
pci_devices does not terminate at computer shutdown
Status in “pm-utils” package in Ubuntu:
Confirmed
Bug description:
I have a clean install of 13.10 using the 3.11 kernel. I have
previously reported this bug with the 2.12 kernel (Bug #1261898), when
I used apportcollect it instructed me to use standard Kernel and re-
report if bug persists; it does...
When I shutdown or restart the process hangs. I press a key and I see:
**Killing all remaining processes ... [fail]** (fail is in red)
This is followed by more info (sometime referring to nm-dispatcher or modem
and always ends:
mount:/ is busy
will now restart (or halt as the case may be)
Then nothing else happens the process hangs there, power on my PC (Dell 5150
desktop) remains on and I need to do a hard reset to turn my PC off.
I have seen relatively similar problems but none match mine exactly, I
have attempted using:
sudo shutdown -P now
or
sudo shutdown -H now
or
sudo reboot
But the results are the same.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: pm-utils 1.4.1-12ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Mon Dec 23 14:15:34 2013
ExecutablePath: /usr/lib/pm-utils/power.d/pci_devices
InstallationDate: Installed on 2013-10-19 (64 days ago)
InstallationMedia: Ubuntu 13.10 Saucy Salamander - Release amd64
(20131016.1)
InterpreterPath: /bin/dash
MarkForUpload: True
OmitPids: 1093 4435 863 731 4441 726 691 667 4514 759 4473 710 731 4441 726
691 667 4514 759 710
PackageArchitecture: all
ProcCmdline: /bin/sh /usr/lib/pm-utils/power.d/pci_devices false
ProcEnviron:
LC_COLLATE=C
PATH=(custom, no user)
SourcePackage: pm-utils
Title: pci_devices does not terminate at computer shutdown
UpgradeStatus: No upgrade log present (probably fresh install)
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