Affects me, too, running Xubuntu 12.10 on ASUS U36SD.

I've also noticed some strange lines during resume on the screen, when I've looked through them in dmesg, I got lines like this:
[code]
xhci_hcd 0000:04:00.0: Refused to change power state, currently in D3
...
xhci_hcd 0000:04:00.0: WARN: xHC restore state timeout
xhci_hcd 0000:04:00.0: PCI post-resume error -110!
xhci_hcd 0000:04:00.0: HC died; cleaning up
...
[/code]

:(

Furthermore, after hibernation (not suspend) the laptop seems to be somehow slow in IO operations....


The relevant part of the dmesg:
$ dmesg | grep "^\[[[:space:]]*48[123][0-9]\.[0-9]*\]"
[ 4812.603941] usb 2-1.2: USB disconnect, device number 3
[ 4824.754196] wlan0: deauthenticating from 28:10:7b:8c:bd:c4 by local choice (reason=3)
[ 4824.790452] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 4824.790463] cfg80211: Restoring regulatory settings
[ 4824.790470] cfg80211: Calling CRDA to update world regulatory domain
[ 4824.803648] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 4824.806237] cfg80211: World regulatory domain updated:
[ 4824.806241] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 4824.806243] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 4824.806246] cfg80211:   (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 4824.806247] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 4824.806249] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 4824.806251] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 4826.100050] init: anacron main process (4982) killed by TERM signal
[ 4826.801472] PM: Syncing filesystems ... done.
[ 4826.803816] PM: Preparing system for mem sleep
[ 4826.833878] bbswitch: enabling discrete graphics
[ 4827.214186] pci 0000:01:00.0: power state changed by ACPI to D0
[ 4827.214194] pci 0000:01:00.0: power state changed by ACPI to D0
[ 4827.214231] pci 0000:01:00.0: power state changed by ACPI to D0
[ 4827.214233] pci 0000:01:00.0: power state changed by ACPI to D0
[ 4827.214237] pci 0000:01:00.0: enabling device (0000 -> 0003)
[ 4827.214245] Freezing user space processes ... (elapsed 0.01 seconds) done.
[ 4827.229539] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
[ 4827.245533] PM: Entering mem sleep
[ 4827.245582] Suspending console(s) (use no_console_suspend to debug)
[ 4827.245866] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 4827.257006] sd 0:0:0:0: [sda] Stopping disk
[ 4827.297566] pciehp 0000:00:1c.3:pcie04: pciehp_suspend ENTRY
[ 4827.691173] PM: suspend of drv:sd dev:0:0:0:0 complete after 445.536 msecs
[ 4827.691219] PM: suspend of drv:scsi dev:target0:0:0 complete after 445.563 msecs
[ 4827.691236] PM: suspend of drv:scsi dev:host0 complete after 408.912 msecs
[ 4827.697310] PM: suspend of drv: dev:ata1 complete after 414.939 msecs
[ 4827.713309] PM: suspend of drv:ahci dev:0000:00:1f.2 complete after 430.898 msecs
[ 4827.713357] PM: suspend of drv: dev:pci0000:00 complete after 427.467 msecs
[ 4827.713363] PM: suspend of devices complete after 467.929 msecs
[ 4827.713365] PM: suspend devices took 0.468 seconds
[ 4827.713480] PM: late suspend of devices complete after 0.113 msecs
[ 4827.729324] xhci_hcd 0000:04:00.0: wake-up capability enabled by ACPI
[ 4827.761354] ehci_hcd 0000:00:1d.0: wake-up capability enabled by ACPI
[ 4827.777278] ehci_hcd 0000:00:1a.0: wake-up capability enabled by ACPI
[ 4827.809269] PM: noirq suspend of devices complete after 95.834 msecs
[ 4827.809455] ACPI: Preparing to enter system sleep state S3
[ 4828.045318] PM: Saving platform NVS memory
[ 4828.046419] Disabling non-boot CPUs ...
[ 4828.046947] Broke affinity for irq 17
[ 4828.148998] CPU 1 is now offline
[ 4828.252937] CPU 2 is now offline
[ 4828.253560] Broke affinity for irq 16
[ 4828.356878] CPU 3 is now offline
[ 4828.357237] Extended CMOS year: 2000
[ 4828.358272] ACPI: Low-level resume complete
[ 4828.358314] PM: Restoring platform NVS memory
[ 4828.358734] Extended CMOS year: 2000
[ 4828.358771] Enabling non-boot CPUs ...
[ 4828.358843] Booting Node 0 Processor 1 APIC 0x2
[ 4828.372534] CPU1 is up
[ 4828.372904] Booting Node 0 Processor 2 APIC 0x1
[ 4828.386580] CPU2 is up
[ 4828.386808] Booting Node 0 Processor 3 APIC 0x3
[ 4828.400543] CPU3 is up
[ 4828.403925] ACPI: Waking up from system sleep state S3
[ 4829.558224] ehci_hcd 0000:00:1a.0: wake-up capability disabled by ACPI
[ 4829.558514] ehci_hcd 0000:00:1d.0: wake-up capability disabled by ACPI
[ 4829.573755] pci_raw_set_power_state: 28 callbacks suppressed
[ 4829.573763] xhci_hcd 0000:04:00.0: Refused to change power state, currently in D3
[ 4829.633489] xhci_hcd 0000:04:00.0: wake-up capability disabled by ACPI
[ 4829.645711] xhci_hcd 0000:04:00.0: Refused to change power state, currently in D3
[ 4829.645888] PM: noirq resume of devices complete after 87.866 msecs
[ 4829.645976] PM: early resume of devices complete after 0.055 msecs
[ 4829.646034] i915 0000:00:02.0: setting latency timer to 64
[ 4829.646057] ehci_hcd 0000:00:1a.0: setting latency timer to 64
[ 4829.646089] mei 0000:00:16.0: irq 47 for MSI/MSI-X
[ 4829.646124] snd_hda_intel 0000:00:1b.0: irq 48 for MSI/MSI-X
[ 4829.646139] pciehp 0000:00:1c.3:pcie04: pciehp_resume ENTRY
[ 4829.646159] ehci_hcd 0000:00:1d.0: setting latency timer to 64
[ 4829.646185] ahci 0000:00:1f.2: setting latency timer to 64
[ 4829.653222] mei 0000:00:16.0: wd: failed to find the client
[ 4829.661622] xhci_hcd 0000:04:00.0: Refused to change power state, currently in D3
[ 4829.661636] xhci_hcd 0000:04:00.0: WARN: xHC restore state timeout
[ 4829.661638] xhci_hcd 0000:04:00.0: PCI post-resume error -110!
[ 4829.661639] xhci_hcd 0000:04:00.0: HC died; cleaning up
[ 4829.661640] xhci_hcd 0000:04:00.0: HC died; cleaning up
[ 4829.661646] dpm_run_callback(): pci_pm_resume+0x0/0xd0 returns -110
[ 4829.661649] PM: Device 0000:04:00.0 failed to resume async: error -110
[ 4829.683133] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 4829.825664] PM: resume of drv: dev:ep_00 complete after 179.209 msecs
[ 4829.825667] PM: resume of drv:hub dev:1-1:1.0 complete after 179.237 msecs
[ 4829.825669] PM: resume of drv:usb dev:1-1.2 complete after 179.114 msecs
[ 4829.825672] PM: resume of drv:usb dev:1-1.1 complete after 178.994 msecs
[ 4829.825691] PM: resume of drv:usb dev:1-1.6 complete after 179.080 msecs
[ 4829.825706] PM: resume of drv: dev:ep_81 complete after 179.270 msecs
[ 4829.874129] PM: resume of drv: dev:ep_00 complete after 227.492 msecs
[ 4829.874131] PM: resume of drv:usb dev:1-1.6:1.0 complete after 227.529 msecs
[ 4829.874138] PM: resume of drv: dev:ep_02 complete after 227.516 msecs
[ 4829.874177] PM: resume of drv: dev:ep_81 complete after 227.566 msecs
[ 4829.880212] PM: resume of drv: dev:ep_00 complete after 233.638 msecs
[ 4829.880215] PM: resume of drv:uvcvideo dev:1-1.2:1.1 complete after 233.652 msecs
[ 4829.880218] PM: resume of drv:uvcvideo dev:1-1.2:1.0 complete after 233.677 msecs
[ 4829.880225] PM: resume of drv: dev:ep_83 complete after 233.679 msecs
[ 4829.897725] usb 1-1.1: reset full-speed USB device number 6 using ehci_hcd
[ 4829.989891] usb 1-1.1: device firmware changed
[ 4829.990289] PM: resume of drv: dev:ep_00 complete after 343.585 msecs
[ 4829.990304] PM: resume of drv:btusb dev:1-1.1:1.0 complete after 343.685 msecs
[ 4829.990306] PM: resume of drv:btusb dev:1-1.1:1.1 complete after 343.635 msecs
[ 4829.990329] PM: resume of drv: dev:ep_83 complete after 343.651 msecs
[ 4829.990331] PM: resume of drv: dev:ep_03 complete after 343.639 msecs
[ 4829.990333] PM: resume of drv: dev:ep_82 complete after 343.692 msecs
[ 4829.990343] PM: resume of drv: dev:ep_81 complete after 343.711 msecs
[ 4829.990345] PM: resume of drv: dev:ep_02 complete after 343.689 msecs
[ 4831.204906] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 4831.205893] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[ 4831.206220] ata1.00: ACPI cmd ef/10:06:00:00:00:a0 (SET FEATURES) succeeded
[ 4831.206226] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
[ 4831.208217] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[ 4831.208433] ata1.00: ACPI cmd ef/10:06:00:00:00:a0 (SET FEATURES) succeeded
[ 4831.208437] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
[ 4831.209343] ata1.00: configured for UDMA/133
[ 4831.224965] PM: resume of drv:scsi dev:host0 complete after 1579.506 msecs
[ 4831.224968] PM: resume of drv:ata_port dev:ata1 complete after 1535.832 msecs
[ 4831.224982] PM: resume of drv:scsi dev:target0:0:0 complete after 1579.348 msecs
[ 4831.224995] PM: resume of drv:sd dev:0:0:0:0 complete after 1579.349 msecs
[ 4831.225000] PM: resume of drv:scsi_host dev:host0 complete after 1579.546 msecs
[ 4831.225002] sd 0:0:0:0: [sda] Starting disk
[ 4831.226507] Extended CMOS year: 2000
[ 4831.251566] PM: resume of drv:scsi_device dev:0:0:0:0 complete after 1605.916 msecs
[ 4831.251699] PM: resume of devices complete after 1606.565 msecs
[ 4831.251768] PM: resume devices took 1.604 seconds
[ 4831.251924] PM: Finishing wakeup.
[ 4831.252166] usb 1-1.1: USB disconnect, device number 6
[ 4831.251925] Restarting tasks ... done.
[ 4831.332840] usb 1-1.1: new full-speed USB device number 7 using ehci_hcd
[ 4831.347712] video LNXVIDEO:00: Restoring backlight state
[ 4831.347963] video LNXVIDEO:01: Restoring backlight state
[ 4831.348397] bbswitch: disabling discrete graphics
[ 4831.348470] bbswitch: Result of Optimus _DSM call: 01000059
[ 4831.425773] usb 1-1.1: New USB device found, idVendor=13d3, idProduct=3304
[ 4831.425783] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 4831.448933] pci 0000:01:00.0: power state changed by ACPI to D3
[ 4831.694539] usb 1-1.1: USB disconnect, device number 7
[ 4832.342423] init: anacron main process (5285) killed by TERM signal
[ 4832.410904] usb 1-1.1: new full-speed USB device number 8 using ehci_hcd
[ 4832.440274] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 4832.442841] atl1c 0000:05:00.0: irq 49 for MSI/MSI-X
[ 4832.457020] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 4832.505250] usb 1-1.1: New USB device found, idVendor=0cf3, idProduct=3005
[ 4832.505259] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
...
...