Dear all, I just saw this in my dmesg (kernel 3.0.3) on a DH67BLB3 mainboard (no addon cards or anything attached): WARNING: at drivers/gpu/drm/i915/i915_irq.c:649 ironlake_irq_handler+0x709/0x720() Hardware name: Missed a PM interrupt Modules linked in: Pid: 0, comm: swapper Not tainted 3.0.3 #4 Call Trace: [] ? warn_slowpath_common+0x7b/0xc0 [] ? warn_slowpath_fmt+0x45/0x50 [] ? ironlake_irq_handler+0x709/0x720 [] ? blk_done_softirq+0x75/0x90 [] ? handle_irq_event_percpu+0x3a/0x140 [] ? read_tsc+0x5/0x20 [] ? handle_irq_event+0x33/0x60 [] ? handle_edge_irq+0x5d/0x110 [] ? handle_irq+0x15/0x20 [] ? do_IRQ+0x53/0xd0 [] ? common_interrupt+0x13/0x13 [] ? intel_idle+0xb7/0x120 [] ? intel_idle+0x9a/0x120 [] ? cpuidle_idle_call+0x81/0x100 [] ? cpu_idle+0x5e/0xb0 [] ? start_kernel+0x438/0x443 [] ? x86_64_start_kernel+0x104/0x113 $ cat /proc/cpuinfo | grep Core | sort -u model name : Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz $ lspci 00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Sandy Bridge Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 05) 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 05) 00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b5) 00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b5) 00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 05) 01:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10) 03:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04) $ cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 0: 2459 0 0 0 0 0 0 0 IO-APIC-edge timer 1: 2 0 0 0 0 0 0 0 IO-APIC-edge i8042 8: 1 0 0 0 0 0 0 0 IO-APIC-edge rtc0 9: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi acpi 12: 3 0 0 0 0 0 0 0 IO-APIC-edge i8042 16: 1175258852 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1 23: 30 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2 40: 0 0 0 0 0 0 0 0 PCI-MSI-edge PCIe PME 41: 0 0 0 0 0 0 0 0 PCI-MSI-edge PCIe PME 42: 5992215 0 0 0 0 0 0 0 PCI-MSI-edge i915 43: 95318489 0 0 0 0 0 0 0 PCI-MSI-edge ahci 44: 14074153 0 0 0 0 0 0 0 PCI-MSI-edge eth0 NMI: 0 0 0 0 0 0 0 0 Non-maskable interrupts LOC: 1164594470 180433546 174024393 165733517 251730525 142586007 140662100 144705720 Local timer interrupts SPU: 0 0 0 0 0 0 0 0 Spurious interrupts PMI: 0 0 0 0 0 0 0 0 Performance monitoring interrupts IWI: 0 0 0 0 0 0 0 0 IRQ work interrupts RES: 10976738 14449620 12484512 10296658 64938540 10026255 8551007 7452717 Rescheduling interrupts CAL: 6753507 4549505 4174293 4569450 6989000 7046680 7443517 8433381 Function call interrupts TLB: 1582967 1484471 1421638 1417115 2112721 1981530 2063581 1874732 TLB shootdowns TRM: 0 0 0 0 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 0 0 0 0 Threshold APIC interrupts MCE: 0 0 0 0 0 0 0 0 Machine check exceptions MCP: 2336 2336 2336 2336 2336 2336 2336 2336 Machine check polls ERR: 0 MIS: 0 -- For the one fact about the future of which we can be certain is that it will be utterly fantastic. -- Arthur C. Clarke, 1962