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I've filed this bug against pm-utils as I'm not sure which package is
the root cause of this. My apologies if it's really something else. Feel
free to re-assign in this case.

I have a Thinkpad T530 running Ubuntu 13.04 that will sometimes suspend,
but sometimes won't. When it won't, the suspend LED flashes for a few
seconds, then the battery LED flashes for a seconds, and the system
returns to normal running. When this happens, no amount of trying to
suspend seems to work, and the only option is to do a full shutdown.
Here's the part of /var/log/kern.log that seems most appropriate:

Jun 15 10:53:20 albatross kernel: [558688.602852] PM: Syncing filesystems ... done.
Jun 15 10:53:25 albatross kernel: [558688.615862] Freezing user space processes ... (elapsed 0.01 seconds) done.
Jun 15 10:53:25 albatross kernel: [558688.629715] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
Jun 15 10:53:25 albatross kernel: [558688.645836] Suspending console(s) (use no_console_suspend to debug)
Jun 15 10:53:25 albatross kernel: [558688.646018] sd 1:0:0:0: [sdb] Synchronizing SCSI cache
Jun 15 10:53:25 albatross kernel: [558688.646115] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jun 15 10:53:25 albatross kernel: [558688.646257] sd 1:0:0:0: [sdb] Stopping disk
Jun 15 10:53:25 albatross kernel: [558688.663882] sd 0:0:0:0: [sda] Stopping disk
Jun 15 10:53:25 albatross kernel: [558688.881041] e1000e 0000:00:19.0: System wakeup enabled by ACPI
Jun 15 10:53:25 albatross kernel: [558689.204873] thinkpad_acpi: unknown possible thermal alarm or keyboard event received
Jun 15 10:53:25 albatross kernel: [558689.204876] thinkpad_acpi: unhandled HKEY event 0x6040
Jun 15 10:53:25 albatross kernel: [558689.204878] thinkpad_acpi: please report the conditions when this event happened to
ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
Jun 15 10:53:25 albatross kernel: [558689.205237] thinkpad_acpi: EC reports that Thermal Table has changed
Jun 15 10:53:25 albatross kernel: [558689.336431] PM: suspend of devices complete after 691.807 msecs
Jun 15 10:53:25 albatross kernel: [558689.336542] PM: late suspend of devices complete after 0.109 msecs
Jun 15 10:53:25 albatross kernel: [558689.352427] ehci-pci 0000:00:1d.0: System wakeup enabled by ACPI

I've also attached the full kern.log from around that time. A few other
details that may be of interest:

root@albatross:~# uname -a
Linux albatross 3.8.0-23-generic #34-Ubuntu SMP Wed May 29 20:24:54 UTC 2013 i686 i686 i686 GNU/Linux
root@albatross:~# lspci
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:16.3 Serial controller: Intel Corporation 7 Series/C210 Series Chipset Family KT Controller (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation QM77 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [NVS 5400M] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GF108 High Definition Audio Controller (rev a1)
02:00.0 System peripheral: Ricoh Co Ltd PCIe SDXC/MMC Host Controller (rev 08)
02:00.3 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 PCIe IEEE 1394 Controller (rev 04)
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)
root@albatross:~# cat /proc/partitions
major minor  #blocks  name

   8        0  250059096 sda
   8        1  241998848 sda1
   8        2          1 sda2
   8        5    8057856 sda5
   8       16  732574584 sdb
   8       17  724611825 sdb1
   8       18    7960176 sdb2

sda is the SSD that came with the laptop. sdb is a third party magnetic
hard disk in the CD slot.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: pm-utils 1.4.1-9git1
ProcVersionSignature: Ubuntu 3.8.0-23.34-generic 3.8.11
Uname: Linux 3.8.0-23-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: i386
Date: Sun Jun 16 14:27:18 2013
InstallationDate: Installed on 2010-03-01 (1202 days ago)
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: pm-utils
UpgradeStatus: Upgraded to raring on 2013-04-26 (51 days ago)

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: apport-bug i386 raring
-- 
Thinkpad sometimes won't suspend
https://bugs.launchpad.net/bugs/1191465
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