in xubuntu 12.10, attempting to suspend causes the machine to attempt to suspend, but the fans never go off and after about 30 seconds, the screen comes back on.
Oct 12 00:41:58 htpc kernel: [   23.660906] PM: Syncing filesystems ... done.
Oct 12 00:41:58 htpc kernel: [   23.669672] PM: Preparing system for mem sleep
Oct 12 00:42:29 htpc kernel: [   23.753134] Freezing user space processes ... (elapsed 0.01 seconds) done.
Oct 12 00:42:29 htpc kernel: [   23.768101] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
Oct 12 00:42:29 htpc kernel: [   23.784082] PM: Entering mem sleep
Oct 12 00:42:29 htpc kernel: [   23.784101] Suspending console(s) (use no_console_suspend to debug)
Oct 12 00:42:29 htpc kernel: [   23.784807] sd 7:0:0:0: >[sda] Synchronizing SCSI cache
Oct 12 00:42:29 htpc kernel: [   23.784838] mceusb 2-4:1.0: >suspend
Oct 12 00:42:29 htpc kernel: [   23.784932] sd 7:0:0:0: >[sda] Stopping disk
Oct 12 00:42:29 htpc kernel: [   23.787055] [drm] nouveau 0000:03:00.0: Disabling display...
Oct 12 00:42:29 htpc kernel: [   23.853072] [drm] nouveau 0000:03:00.0: Disabling fbcon...
Oct 12 00:42:29 htpc kernel: [   23.853092] [drm] nouveau 0000:03:00.0: Unpinning framebuffer(s)...
Oct 12 00:42:29 htpc kernel: [   23.853125] [drm] nouveau 0000:03:00.0: Evicting buffers...
Oct 12 00:42:29 htpc kernel: [   23.941495] [drm] nouveau 0000:03:00.0: Idling channels...
Oct 12 00:42:29 htpc kernel: [   23.942001] [drm] nouveau 0000:03:00.0: Suspending GPU objects...
Oct 12 00:42:29 htpc kernel: [   24.036035] PM: suspend of drv:snd_hda_intel dev:0000:00:06.1 complete after 247.142 msecs
Oct 12 00:42:29 htpc kernel: [   25.794308] [drm] nouveau 0000:03:00.0: And we're gone!
Oct 12 00:42:29 htpc kernel: [   25.808036] PM: suspend of drv:nouveau dev:0000:03:00.0 complete after 2020.985 msecs
Oct 12 00:42:29 htpc kernel: [   25.808067] PM: suspend of drv:pcieport dev:0000:00:0f.0 complete after 2019.870 msecs
Oct 12 00:42:29 htpc kernel: [   53.856263] ata8.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Oct 12 00:42:29 htpc kernel: [   53.856265] ata8.00: failed command: STANDBY IMMEDIATE
Oct 12 00:42:29 htpc kernel: [   53.856270] ata8.00: cmd e0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Oct 12 00:42:29 htpc kernel: [   53.856270]          res 40/00:00:00:00:00/00:00:00:00:00/40 Emask 0x4 (timeout)
Oct 12 00:42:29 htpc kernel: [   53.856271] ata8.00: status: { DRDY }
Oct 12 00:42:29 htpc kernel: [   53.856276] ata8: hard resetting link
Oct 12 00:42:29 htpc kernel: [   53.856277] ata8: nv: skipping hardreset on occupied port
Oct 12 00:42:29 htpc kernel: [   54.324031] ata8: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Oct 12 00:42:29 htpc kernel: [   54.340196] ata8.00: configured for UDMA/100
Oct 12 00:42:29 htpc kernel: [   54.340199] ata8.00: device reported invalid CHS sector 0
Oct 12 00:42:29 htpc kernel: [   54.340210] ata8: EH complete
Oct 12 00:42:29 htpc kernel: [   54.340223] sd 7:0:0:0: >[sda] START_STOP FAILED
Oct 12 00:42:29 htpc kernel: [   54.340225] sd 7:0:0:0: >[sda]  
Oct 12 00:42:29 htpc kernel: [   54.340226] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Oct 12 00:42:29 htpc kernel: [   54.340227] sd 7:0:0:0: >[sda]  
Oct 12 00:42:29 htpc kernel: [   54.340228] Sense Key : Aborted Command [current] [descriptor]
Oct 12 00:42:29 htpc kernel: [   54.340231] sd 7:0:0:0: >[sda]  
Oct 12 00:42:29 htpc kernel: [   54.340232] Add. Sense: No additional sense information
Oct 12 00:42:29 htpc kernel: [   54.340246] dpm_run_callback(): scsi_bus_suspend+0x0/0x20 returns 134217730
Oct 12 00:42:29 htpc kernel: [   54.340249] PM: suspend of drv:sd dev:7:0:0:0 complete after 30555.449 msecs
Oct 12 00:42:29 htpc kernel: [   54.340254] PM: Device 7:0:0:0 failed to suspend async: error 134217730
Oct 12 00:42:29 htpc kernel: [   54.340290] PM: Some devices failed to suspend
Oct 12 00:42:29 htpc kernel: [   54.340548] ohci_hcd 0000:00:02.0: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.340565] ehci_hcd 0000:00:02.1: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.340576] pci 0000:00:06.0: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.356108] pata_amd 0000:00:04.0: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.356169] sata_nv 0000:00:05.0: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.356480] [drm] nouveau 0000:03:00.0: We're back, enabling device...
Oct 12 00:42:29 htpc kernel: [   54.356508] [drm] nouveau 0000:03:00.0: POSTing device...
Oct 12 00:42:29 htpc kernel: [   54.356511] [drm] nouveau 0000:03:00.0: Parsing VBIOS init table 0 at offset 0xD0DE
Oct 12 00:42:29 htpc kernel: [   54.356605] pata_jmicron 0000:02:00.1: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.356633] sata_nv 0000:00:05.1: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.356937] snd_hda_intel 0000:00:06.1: >setting latency timer to 64
Oct 12 00:42:29 htpc kernel: [   54.357770] ata10: port disabled--ignoring
Oct 12 00:42:29 htpc kernel: [   54.381679] [drm] nouveau 0000:03:00.0: Parsing VBIOS init table 1 at offset 0xD4F3
Oct 12 00:42:29 htpc kernel: [   54.438212] [drm] nouveau 0000:03:00.0: Parsing VBIOS init table 2 at offset 0xE513
Oct 12 00:42:29 htpc kernel: [   54.438239] [drm] nouveau 0000:03:00.0: Parsing VBIOS init table 3 at offset 0xE65C
Oct 12 00:42:29 htpc kernel: [   54.439975] [drm] nouveau 0000:03:00.0: Parsing VBIOS init table 4 at offset 0xE898
Oct 12 00:42:29 htpc kernel: [   54.439976] [drm] nouveau 0000:03:00.0: Parsing VBIOS init table at offset 0xE8FD
Oct 12 00:42:29 htpc kernel: [   54.444047] PM: resume of drv: dev:ep_00 complete after 102.710 msecs
Oct 12 00:42:29 htpc kernel: [   54.444063] PM: resume of drv:hub dev:2-0:1.0 complete after 102.742 msecs
Oct 12 00:42:29 htpc kernel: [   54.444069] PM: resume of drv: dev:ep_81 complete after 102.738 msecs
Oct 12 00:42:29 htpc kernel: [   54.459866] [drm] nouveau 0000:03:00.0: Restoring GPU objects...
Oct 12 00:42:29 htpc kernel: [   54.465491] PM: resume of drv:hub dev:1-1:1.0 complete after 122.695 msecs
Oct 12 00:42:29 htpc kernel: [   54.465497] PM: resume of drv: dev:ep_81 complete after 122.654 msecs
Oct 12 00:42:29 htpc kernel: [   54.465502] PM: resume of drv: dev:ep_00 complete after 122.607 msecs
Oct 12 00:42:29 htpc kernel: [   54.465507] PM: resume of drv:usb dev:1-1.1 complete after 121.918 msecs
Oct 12 00:42:29 htpc kernel: [   54.493042] mceusb 2-4:1.0: >resume
Oct 12 00:42:29 htpc kernel: [   54.493053] PM: resume of drv:mceusb dev:2-4:1.0 complete after 149.217 msecs
Oct 12 00:42:29 htpc kernel: [   54.493060] PM: resume of drv: dev:ep_01 complete after 149.173 msecs
Oct 12 00:42:29 htpc kernel: [   54.493065] PM: resume of drv: dev:ep_81 complete after 149.131 msecs
Oct 12 00:42:29 htpc kernel: [   54.493070] PM: resume of drv: dev:ep_00 complete after 149.084 msecs
Oct 12 00:42:29 htpc kernel: [   54.533858] PM: resume of drv:scsi dev:host8 complete after 191.317 msecs
Oct 12 00:42:29 htpc kernel: [   54.533865] PM: resume of drv:scsi_host dev:host8 complete after 191.274 msecs
Oct 12 00:42:29 htpc kernel: [   54.533876] PM: resume of drv:scsi dev:host10 complete after 190.832 msecs
Oct 12 00:42:29 htpc kernel: [   54.533883] PM: resume of drv:scsi_host dev:host10 complete after 190.788 msecs
Oct 12 00:42:29 htpc kernel: [   54.533888] PM: resume of drv:scsi dev:host11 complete after 190.744 msecs
Oct 12 00:42:29 htpc kernel: [   54.533894] PM: resume of drv:scsi_host dev:host11 complete after 190.701 msecs
Oct 12 00:42:29 htpc kernel: [   54.536612] PM: resume of drv:hub dev:1-1.1:1.0 complete after 192.973 msecs
Oct 12 00:42:29 htpc kernel: [   54.536618] PM: resume of drv: dev:ep_81 complete after 192.930 msecs
Oct 12 00:42:29 htpc kernel: [   54.536623] PM: resume of drv: dev:ep_00 complete after 192.886 msecs
Oct 12 00:42:29 htpc kernel: [   54.536628] PM: resume of drv:usb dev:1-1.1.1 complete after 192.521 msecs
Oct 12 00:42:29 htpc kernel: [   54.536634] PM: resume of drv:usb dev:1-1.1.3 complete after 192.201 msecs
Oct 12 00:42:29 htpc kernel: [   54.536640] PM: resume of drv:usb dev:1-1.1.4 complete after 191.953 msecs
Oct 12 00:42:29 htpc kernel: [   54.564095] [drm] nouveau 0000:03:00.0: Reinitialising engines...
Oct 12 00:42:29 htpc kernel: [   54.564540] [drm] nouveau 0000:03:00.0: Restoring mode...
Oct 12 00:42:29 htpc kernel: [   54.585486] PM: resume of drv:usb-storage dev:1-1.1.1:1.0 complete after 241.356 msecs
Oct 12 00:42:29 htpc kernel: [   54.585494] PM: resume of drv: dev:ep_01 complete after 241.313 msecs
Oct 12 00:42:29 htpc kernel: [   54.585499] PM: resume of drv: dev:ep_82 complete after 241.269 msecs
Oct 12 00:42:29 htpc kernel: [   54.585504] PM: resume of drv: dev:ep_00 complete after 241.220 msecs
Oct 12 00:42:29 htpc kernel: [   54.585509] PM: resume of drv:scsi dev:host12 complete after 241.177 msecs
Oct 12 00:42:29 htpc kernel: [   54.585517] PM: resume of drv:scsi_host dev:host12 complete after 241.134 msecs
Oct 12 00:42:29 htpc kernel: [   54.585522] PM: resume of drv:scsi dev:target12:0:0 complete after 240.535 msecs
Oct 12 00:42:29 htpc kernel: [   54.585528] PM: resume of drv:sr dev:12:0:0:0 complete after 240.490 msecs
Oct 12 00:42:29 htpc kernel: [   54.585538] PM: resume of drv:scsi_device dev:12:0:0:0 complete after 240.451 msecs
Oct 12 00:42:29 htpc kernel: [   54.585993] PM: resume of drv:usbhid dev:1-1.1.3:1.0 complete after 241.508 msecs
Oct 12 00:42:29 htpc kernel: [   54.586001] PM: resume of drv: dev:ep_81 complete after 241.467 msecs
Oct 12 00:42:29 htpc kernel: [   54.586005] PM: resume of drv: dev:ep_02 complete after 241.420 msecs
Oct 12 00:42:29 htpc kernel: [   54.586011] PM: resume of drv: dev:ep_00 complete after 241.376 msecs
Oct 12 00:42:29 htpc kernel: [   54.586622] PM: resume of drv:usbhid dev:1-1.1.4:1.0 complete after 241.885 msecs
Oct 12 00:42:29 htpc kernel: [   54.586628] PM: resume of drv: dev:ep_81 complete after 241.842 msecs
Oct 12 00:42:29 htpc kernel: [   54.586633] PM: resume of drv:usbhid dev:1-1.1.4:1.1 complete after 241.798 msecs
Oct 12 00:42:29 htpc kernel: [   54.586640] PM: resume of drv: dev:ep_82 complete after 241.754 msecs
Oct 12 00:42:29 htpc kernel: [   54.586644] PM: resume of drv: dev:ep_00 complete after 241.708 msecs
Oct 12 00:42:29 htpc kernel: [   54.588032] usb 1-3: >reset high-speed USB device number 3 using ehci_hcd
Oct 12 00:42:29 htpc kernel: [   54.692042] ata2: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   54.692069] ata1: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   54.708065] PM: resume of drv:ata_port dev:ata1 complete after 365.705 msecs
Oct 12 00:42:29 htpc kernel: [   54.708068] PM: resume of drv:scsi dev:host0 complete after 366.809 msecs
Oct 12 00:42:29 htpc kernel: [   54.708079] PM: resume of drv:scsi_host dev:host0 complete after 366.812 msecs
Oct 12 00:42:29 htpc kernel: [   54.708091] PM: resume of drv:scsi dev:host1 complete after 366.820 msecs
Oct 12 00:42:29 htpc kernel: [   54.708103] PM: resume of drv:scsi_host dev:host1 complete after 366.824 msecs
Oct 12 00:42:29 htpc kernel: [   54.708230] Extended CMOS year: 2000
Oct 12 00:42:29 htpc kernel: [   54.893983] snd-usb-audio 1-3:1.2: >no reset_resume for driver snd-usb-audio?
Oct 12 00:42:29 htpc kernel: [   54.893985] snd-usb-audio 1-3:1.3: >no reset_resume for driver snd-usb-audio?
Oct 12 00:42:29 htpc kernel: [   54.894195] PM: resume of drv:uvcvideo dev:1-3:1.0 complete after 550.904 msecs
Oct 12 00:42:29 htpc kernel: [   54.894197] PM: resume of drv:usb dev:1-3:1.2 complete after 550.755 msecs
Oct 12 00:42:29 htpc kernel: [   54.894202] PM: resume of drv: dev:ep_00 complete after 550.663 msecs
Oct 12 00:42:29 htpc kernel: [   54.894205] PM: resume of drv: dev:ep_87 complete after 550.866 msecs
Oct 12 00:42:29 htpc kernel: [   54.894215] PM: resume of drv:usb dev:1-3:1.3 complete after 550.725 msecs
Oct 12 00:42:29 htpc kernel: [   54.894217] PM: resume of drv:uvcvideo dev:1-3:1.1 complete after 550.826 msecs
Oct 12 00:42:29 htpc kernel: [   55.064025] ata7: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   55.064064] PM: resume of drv:scsi dev:host6 complete after 722.322 msecs
Oct 12 00:42:29 htpc kernel: [   55.064083] PM: resume of drv:scsi_host dev:host6 complete after 721.707 msecs
Oct 12 00:42:29 htpc kernel: [   55.080038] ata4: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   55.080039] ata6: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   55.080056] PM: resume of drv:scsi dev:host5 complete after 738.422 msecs
Oct 12 00:42:29 htpc kernel: [   55.080058] PM: resume of drv:scsi dev:host3 complete after 738.591 msecs
Oct 12 00:42:29 htpc kernel: [   55.080064] PM: resume of drv:scsi_host dev:host5 complete after 738.403 msecs
Oct 12 00:42:29 htpc kernel: [   55.080066] PM: resume of drv:scsi_host dev:host3 complete after 738.572 msecs
Oct 12 00:42:29 htpc kernel: [   55.080071] ata3: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   55.080079] ata5: SATA link down (SStatus 0 SControl 300)
Oct 12 00:42:29 htpc kernel: [   55.080089] PM: resume of drv:scsi dev:host2 complete after 738.682 msecs
Oct 12 00:42:29 htpc kernel: [   55.080096] PM: resume of drv:scsi dev:host4 complete after 738.517 msecs
Oct 12 00:42:29 htpc kernel: [   55.080097] PM: resume of drv:scsi_host dev:host2 complete after 738.657 msecs
Oct 12 00:42:29 htpc kernel: [   55.080103] PM: resume of drv:ata_port dev:ata3 complete after 371.832 msecs
Oct 12 00:42:29 htpc kernel: [   55.080105] PM: resume of drv:scsi_host dev:host4 complete after 738.499 msecs
Oct 12 00:42:29 htpc kernel: [   55.080694] PM: resume of devices complete after 740.401 msecs
Oct 12 00:42:29 htpc kernel: [   55.286919] PM: resume devices took 0.944 seconds
Oct 12 00:42:29 htpc kernel: [   55.287311] PM: Finishing wakeup.
Oct 12 00:42:29 htpc kernel: [   55.287313] Restarting tasks ... done.
Oct 12 00:42:30 htpc kernel: [   55.802404] forcedeth 0000:00:08.0: >irq 42 for MSI/MSI-X
Oct 12 00:42:30 htpc kernel: [   55.802437] forcedeth 0000:00:08.0: >eth0: MSI enabled
Oct 12 00:42:30 htpc kernel: [   55.802653] forcedeth 0000:00:08.0: >eth0: no link during initialization
Oct 12 00:42:30 htpc kernel: [   55.803366] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Oct 12 00:42:32 htpc kernel: [   57.459290] forcedeth 0000:00:08.0: >eth0: link up
Oct 12 00:42:32 htpc kernel: [   57.460587] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready