Is the duplicate status confirmed? 'Cos I don't think it is a duplicate. I didn't find any lines at bug #1140716 about the [drm:gen6_sanitize_pm] ERROR that happens in here.

I have something similar in my Dell XPS 14z (Intel Sandybridge i7-2640M,  nVidia GeForce GT 520M optimus, with bumblebee, laptop-mode-tools and jupiter, and using external monitor on HDMI port). 
But, in my case, I'm not experiencing any crash, although, when the system is back from suspended mode, it shows the following (dmesg) where the error below appears 4 times at least:

[drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 1a000000, was 12000000

The numbers at the end above vary between:
...expected 1a000000, was 12000000
...expected 1a0d0000, was 1a000000
...expected 000d0000, was 1a0d0000
...expected 000d0000, was 1a000000
...expected 1a000000, was 12060000

Here's a part of my dmesg result:

(...)

[   18.552039] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input12
[   20.080980] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 1a000000, was 12000000
[   20.130902] bbswitch: version 0.7
[   20.130909] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[   20.130915] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[   20.130997] bbswitch: detected an Optimus _DSM function
[   20.131023] pci 0000:01:00.0: power state changed by ACPI to D0
[   20.131026] pci 0000:01:00.0: power state changed by ACPI to D0
[   20.131030] pci 0000:01:00.0: enabling device (0000 -> 0003)
[   20.131037] pci 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[   20.131040] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[   20.132534] bbswitch: disabling discrete graphics
[   20.132721] pci 0000:01:00.0: PCI INT A disabled
[   20.149709] pci 0000:01:00.0: power state changed by ACPI to D3
[   20.404299] init: plymouth-stop pre-start process (2682) terminated with status 1
[   35.859303] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 1a0d0000, was 1a000000
[   94.868492] kbd_keycode: 63 callbacks suppressed
[   94.868495] keyboard: can't emulate rawmode for keycode 240
[   94.868502] keyboard: can't emulate rawmode for keycode 240
[   94.981723] iwlwifi 0000:08:00.0: RF_KILL bit toggled to enable radio.
[   95.425221] usb 1-1.5: new full-speed USB device number 6 using ehci_hcd
[   95.549126] Bluetooth: Generic Bluetooth USB driver ver 0.6
[   95.549276] usbcore: registered new interface driver btusb
[   95.856777] iwlwifi 0000:08:00.0: L1 Enabled; Disabling L0S
[   95.863381] iwlwifi 0000:08:00.0: Radio type=0x1-0x2-0x0
[   96.155612] iwlwifi 0000:08:00.0: L1 Enabled; Disabling L0S
[   96.162380] iwlwifi 0000:08:00.0: Radio type=0x1-0x2-0x0
[   96.273730] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   97.780647] keyboard: can't emulate rawmode for keycode 240
[   97.780672] keyboard: can't emulate rawmode for keycode 240
[   97.822546] iwlwifi 0000:08:00.0: RF_KILL bit toggled to disable radio.
[   97.822705] iwlwifi 0000:08:00.0: Request scan called when driver not ready.
[   97.890609] iwlwifi 0000:08:00.0: Not sending command - RF KILL
[   97.890612] iwlwifi 0000:08:00.0: Error sending REPLY_RXON: enqueue_hcmd failed: -5
[   97.890623] iwlwifi 0000:08:00.0: Error clearing ASSOC_MSK on BSS (-5)
[   97.890653] iwlwifi 0000:08:00.0: Not sending command - RF KILL
[   97.890655] iwlwifi 0000:08:00.0: Error sending REPLY_LEDS_CMD: enqueue_hcmd failed: -5
[   98.037534] usb 1-1.5: USB disconnect, device number 6
[   98.037677] Bluetooth: hci0 urb ffff88030f058180 submission failed
[ 4106.786551] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 000d0000, was 1a0d0000
[10356.554955] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=600
[10357.330750] xhci_hcd 0000:0f:00.0: PME# enabled
[10365.619608] NMI watchdog enabled, takes one hw-pmu counter.
[10365.620293] NMI watchdog enabled, takes one hw-pmu counter.
[10365.620338] NMI watchdog enabled, takes one hw-pmu counter.
[10365.620376] NMI watchdog enabled, takes one hw-pmu counter.
[10365.932795] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=0
[10366.440990] xhci_hcd 0000:0f:00.0: PME# disabled
[10366.441024] xhci_hcd 0000:0f:00.0: setting latency timer to 64
[10393.537981] init: anacron main process (8579) killed by TERM signal
[10393.844131] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=600
[10396.807885] xhci_hcd 0000:0f:00.0: PME# enabled
[10398.717649] NMI watchdog enabled, takes one hw-pmu counter.
[10398.717751] NMI watchdog enabled, takes one hw-pmu counter.
[10398.717861] NMI watchdog enabled, takes one hw-pmu counter.
[10398.717930] NMI watchdog enabled, takes one hw-pmu counter.
[10399.104939] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=0
[10399.579430] xhci_hcd 0000:0f:00.0: PME# disabled
[10399.579450] xhci_hcd 0000:0f:00.0: setting latency timer to 64
[10405.905038] init: anacron main process (9953) killed by TERM signal
[10406.233560] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=600
[10429.766634] xhci_hcd 0000:0f:00.0: PME# enabled
[10506.469719] NMI watchdog enabled, takes one hw-pmu counter.
[10506.470464] NMI watchdog enabled, takes one hw-pmu counter.
[10506.470516] NMI watchdog enabled, takes one hw-pmu counter.
[10506.470551] NMI watchdog enabled, takes one hw-pmu counter.
[10506.718338] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=0
[10507.199312] xhci_hcd 0000:0f:00.0: PME# disabled
[10507.199347] xhci_hcd 0000:0f:00.0: setting latency timer to 64
[18302.383964] PM: Syncing filesystems ... done.
[18302.392225] PM: Preparing system for mem sleep
[18305.214972] bbswitch: enabling discrete graphics
[18305.635317] pci 0000:01:00.0: power state changed by ACPI to D0
[18305.651167] pci 0000:01:00.0: power state changed by ACPI to D0
[18305.651195] pci 0000:01:00.0: restoring config space at offset 0x1 (was 0x100006, writing 0x100003)
[18305.651207] pci 0000:01:00.0: power state changed by ACPI to D0
[18305.651210] pci 0000:01:00.0: power state changed by ACPI to D0
[18305.651217] pci 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[18305.651222] pci 0000:01:00.0: setting latency timer to 64
[18305.651225] Freezing user space processes ... (elapsed 0.01 seconds) done.
[18305.667125] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
[18305.683108] PM: Entering mem sleep
[18305.683162] Suspending console(s) (use no_console_suspend to debug)
[18305.683416] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[18305.696084] sd 0:0:0:0: [sda] Stopping disk
[18305.816894] PM: suspend of drv:psmouse dev:serio1 complete after 133.658 msecs
[18305.833605] Ready to suspend
[18305.838722] pci 0000:01:00.0: PCI INT A disabled
[18305.854670] ehci_hcd 0000:00:1d.0: PCI INT A disabled
[18306.046635] snd_hda_intel 0000:00:1b.0: PCI INT A disabled
[18306.062363] PM: suspend of drv:snd_hda_intel dev:0000:00:1b.0 complete after 223.877 msecs
[18306.148898] PM: suspend of drv:sd dev:0:0:0:0 complete after 466.177 msecs
[18306.148925] PM: suspend of drv:scsi dev:target0:0:0 complete after 466.192 msecs
[18306.148936] PM: suspend of drv:scsi dev:host0 complete after 315.975 msecs
[18306.194163] PM: suspend of drv:ahci dev:0000:00:1f.2 complete after 355.962 msecs
[18306.829302] rts_pstor 0000:09:00.0: PCI INT A disabled
[18306.845220] PM: suspend of drv:rts_pstor dev:0000:09:00.0 complete after 1013.122 msecs
[18306.845244] PM: suspend of drv:pcieport dev:0000:00:1c.3 complete after 1007.950 msecs
[18307.716697] PM: suspend of drv:atl1c dev:0000:07:00.0 complete after 1885.700 msecs
[18307.716726] PM: suspend of drv:pcieport dev:0000:00:1c.0 complete after 1880.721 msecs
[18307.716737] PM: suspend of drv:mei dev:0000:00:16.0 complete after 1880.698 msecs
[18307.716762] PM: suspend of drv: dev:pci0000:00 complete after 1880.682 msecs
[18307.716777] PM: suspend of devices complete after 2036.556 msecs
[18307.716779] PM: suspend devices took 2.036 seconds
[18307.716938] xhci_hcd 0000:0f:00.0: PME# enabled
[18307.716963] pcieport 0000:00:1c.5: wake-up capability enabled by ACPI
[18307.748189] atl1c 0000:07:00.0: PME# enabled
[18307.748221] pcieport 0000:00:1c.0: wake-up capability enabled by ACPI
[18307.764072] ehci_hcd 0000:00:1d.0: PME# enabled
[18307.764103] ehci_hcd 0000:00:1d.0: wake-up capability enabled by ACPI
[18307.795954] PM: late suspend of devices complete after 79.288 msecs
[18307.796158] ACPI: Preparing to enter system sleep state S3
[18307.891827] PM: Saving platform NVS memory
[18307.894304] Disabling non-boot CPUs ...
[18307.895955] CPU 1 is now offline
[18307.999572] CPU 2 is now offline
[18308.000264] Broke affinity for irq 1
[18308.103412] CPU 3 is now offline
[18308.104046] ACPI: Low-level resume complete
[18308.104084] PM: Restoring platform NVS memory
[18308.104496] CPU0: Thermal monitoring handled by SMI
[18308.104567] Enabling non-boot CPUs ...
[18308.104667] Booting Node 0 Processor 1 APIC 0x1
[18308.104669] smpboot cpu 1: start_ip = 98000
[18308.115584] Calibrating delay loop (skipped) already calibrated this CPU
[18308.115607] CPU1: Thermal monitoring handled by SMI
[18308.135887] NMI watchdog enabled, takes one hw-pmu counter.
[18308.136115] CPU1 is up
[18308.136177] Booting Node 0 Processor 2 APIC 0x2
[18308.136179] smpboot cpu 2: start_ip = 98000
[18308.147092] Calibrating delay loop (skipped) already calibrated this CPU
[18308.147114] CPU2: Thermal monitoring handled by SMI
[18308.167402] NMI watchdog enabled, takes one hw-pmu counter.
[18308.167604] CPU2 is up
[18308.167655] Booting Node 0 Processor 3 APIC 0x3
[18308.167656] smpboot cpu 3: start_ip = 98000
[18308.178571] Calibrating delay loop (skipped) already calibrated this CPU
[18308.178594] CPU3: Thermal monitoring handled by SMI
[18308.198939] NMI watchdog enabled, takes one hw-pmu counter.
[18308.199140] CPU3 is up
[18308.202830] ACPI: Waking up from system sleep state S3
[18308.220304] pcieport 0000:00:01.0: restoring config space at offset 0x7 (was 0x20004040, writing 0x4040)
[18308.220309] pcieport 0000:00:01.0: restoring config space at offset 0x1 (was 0x100007, writing 0x100407)
[18308.220327] i915 0000:00:02.0: restoring config space at offset 0x1 (was 0x900007, writing 0x900407)
[18308.220385] snd_hda_intel 0000:00:1b.0: restoring config space at offset 0x1 (was 0x100006, writing 0x100002)
[18308.220414] pcieport 0000:00:1c.0: restoring config space at offset 0xa (was 0xffffffff, writing 0x0)
[18308.220457] pcieport 0000:00:1c.2: restoring config space at offset 0xa (was 0xffffffff, writing 0x0)
[18308.220463] pcieport 0000:00:1c.2: restoring config space at offset 0x7 (was 0xf0, writing 0x200000f0)
[18308.220506] pcieport 0000:00:1c.3: restoring config space at offset 0x7 (was 0x20002020, writing 0x2020)
[18308.220559] pcieport 0000:00:1c.5: restoring config space at offset 0xa (was 0xffffffff, writing 0x0)
[18308.220567] pcieport 0000:00:1c.5: restoring config space at offset 0x7 (was 0xf0, writing 0x200000f0)
[18308.220630] ehci_hcd 0000:00:1d.0: restoring config space at offset 0x1 (was 0x2900006, writing 0x2900002)
[18308.220652] ehci_hcd 0000:00:1d.0: wake-up capability disabled by ACPI
[18308.220657] ehci_hcd 0000:00:1d.0: PME# disabled
[18308.220712] ahci 0000:00:1f.2: restoring config space at offset 0x1 (was 0x2b00007, writing 0x2b00407)
[18308.220786] pci 0000:01:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100003)
[18308.220898] atl1c 0000:07:00.0: restoring config space at offset 0xf (was 0x100, writing 0x107)
[18308.221193] iwlwifi 0000:08:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10b)
[18308.221572] rts_pstor 0000:09:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10a)
[18308.221666] xhci_hcd 0000:0f:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10b)
[18308.221703] xhci_hcd 0000:0f:00.0: restoring config space at offset 0x1 (was 0x100006, writing 0x100402)
[18308.221753] pcieport 0000:00:1c.5: wake-up capability disabled by ACPI
[18308.221761] xhci_hcd 0000:0f:00.0: PME# disabled
[18308.221839] PM: early resume of devices complete after 1.581 msecs
[18308.221931] i915 0000:00:02.0: setting latency timer to 64
[18308.221938] snd_hda_intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[18308.221944] ehci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23
[18308.221946] snd_hda_intel 0000:00:1b.0: setting latency timer to 64
[18308.221954] ehci_hcd 0000:00:1d.0: setting latency timer to 64
[18308.221981] ahci 0000:00:1f.2: setting latency timer to 64
[18308.221990] mei 0000:00:16.0: irq 51 for MSI/MSI-X
[18308.222003] snd_hda_intel 0000:00:1b.0: irq 52 for MSI/MSI-X
[18308.222020] pci 0000:01:00.0: power state changed by ACPI to D0
[18308.222024] pci 0000:01:00.0: power state changed by ACPI to D0
[18308.222033] pci 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[18308.222039] pci 0000:01:00.0: setting latency timer to 64
[18308.222056] pcieport 0000:00:1c.0: wake-up capability disabled by ACPI
[18308.222083] atl1c 0000:07:00.0: PME# disabled
[18308.222165] Ready to resume
[18308.222194] iwlwifi 0000:08:00.0: RF_KILL bit toggled to disable radio.
[18308.222203] rts_pstor 0000:09:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[18308.222211] rts_pstor 0000:09:00.0: setting latency timer to 64
[18308.222219] rtsx_acquire_irq: chip->msi_en = 0, pci->irq = 19
[18308.222230] xhci_hcd 0000:0f:00.0: setting latency timer to 64
[18308.222590] sd 0:0:0:0: [sda] Starting disk
[18308.331958] PM: resume of drv:atl1c dev:0000:07:00.0 complete after 110.082 msecs
[18308.399833] PM: resume of drv:hub dev:1-1:1.0 complete after 177.429 msecs
[18308.399851] PM: resume of drv: dev:ep_00 complete after 177.425 msecs
[18308.399863] PM: resume of drv: dev:ep_81 complete after 177.450 msecs
[18308.423851] PM: resume of drv:rts_pstor dev:0000:09:00.0 complete after 202.010 msecs
[18308.423863] PM: resume of drv:scsi dev:host6 complete after 201.187 msecs
[18308.423877] PM: resume of drv:scsi_host dev:host6 complete after 201.190 msecs
[18308.423879] PM: resume of drv:scsi dev:target6:0:0 complete after 201.179 msecs
[18308.423893] PM: resume of drv:sd dev:6:0:0:0 complete after 201.182 msecs
[18308.423925] PM: resume of drv:scsi_device dev:6:0:0:0 complete after 201.202 msecs
[18308.448483] PM: resume of drv:hub dev:1-1.2:1.0 complete after 226.081 msecs
[18308.448508] PM: resume of drv: dev:ep_81 complete after 226.086 msecs
[18308.448577] PM: resume of drv: dev:ep_00 complete after 226.118 msecs
[18308.463992] PM: resume of drv:battery dev:PNP0C0A:00 complete after 242.038 msecs
[18308.471962] usb 1-1.4: reset high-speed USB device number 4 using ehci_hcd
[18308.496135] PM: resume of drv:usbhid dev:1-1.2.4:1.0 complete after 273.626 msecs
[18308.496149] PM: resume of drv: dev:ep_00 complete after 273.594 msecs
[18308.496152] PM: resume of drv: dev:ep_81 complete after 273.633 msecs
[18308.496157] PM: resume of drv:usbhid dev:1-1.2.4:1.1 complete after 273.626 msecs
[18308.496170] PM: resume of drv: dev:ep_82 complete after 273.628 msecs
[18308.547583] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[18308.557548] ata2.00: configured for UDMA/133
[18309.075786] PM: resume of drv:i915 dev:0000:00:02.0 complete after 855.135 msecs
[18309.151076] PM: resume of drv:uvcvideo dev:1-1.4:1.0 complete after 929.619 msecs
[18309.151085] PM: resume of drv:uvcvideo dev:1-1.4:1.1 complete after 929.589 msecs
[18309.151093] PM: resume of drv: dev:ep_00 complete after 929.586 msecs
[18309.151101] PM: resume of drv: dev:ep_87 complete after 929.618 msecs
[18311.335420] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[18311.337433] ata1.00: ACPI cmd ef/5a:00:00:00:00:a0 (SET FEATURES) succeeded
[18311.339782] ata1.00: ACPI cmd 00/00:00:00:00:00:a0 (NOP) rejected by device (Stat=0x51 Err=0x04)
[18311.340079] ata1.00: configured for UDMA/133
[18311.378071] PM: resume of drv:sd dev:0:0:0:0 complete after 3160.179 msecs
[18311.378092] PM: resume of drv:scsi_device dev:0:0:0:0 complete after 3160.167 msecs
[18311.378108] PM: resume of drv:scsi_disk dev:0:0:0:0 complete after 2862.973 msecs
[18311.380087] PM: resume of devices complete after 3162.914 msecs
[18311.380161] PM: resume devices took 3.164 seconds
[18311.380182] PM: Finishing wakeup.
[18311.380183] Restarting tasks ... done.
[18311.487557] video LNXVIDEO:00: Restoring backlight state
[18311.487559] video LNXVIDEO:01: Restoring backlight state
[18311.487639] bbswitch: disabling discrete graphics
[18311.487760] pci 0000:01:00.0: PCI INT A disabled
[18311.512023] pci 0000:01:00.0: power state changed by ACPI to D3
[18312.511478] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 1a000000, was 12000000
[18312.820837] atl1c 0000:07:00.0: irq 53 for MSI/MSI-X
[18312.821006] atl1c 0000:07:00.0: atl1c: eth0 NIC Link is Up<100 Mbps Full Duplex>
[21168.672382] EXT4-fs (sda7): re-mounted. Opts: discard,errors=remount-ro,commit=600
[21168.870110] PM: Syncing filesystems ... done.
[21168.875440] PM: Preparing system for mem sleep

(...)