I have attached the dmesg log captured soon after a bootup. I am using a fixed DSDT for the Ferrari 4005 (which I fixed myself).
[NOTE: While looking over the log file it eventually filled up the dmesg buffer, but I noticed the "many lost ticks" warning at the end] A quick analysis shows these interesting entries: [ 19.151590] PCI: No mmconfig possible on device 0:18 .. [ 19.222130] PCI: Bus #07 (-#0a) is hidden behind transparent bridge #06 (-#07) (try 'pci=assign-busses') [ 19.222133] Please report the result to linux-kernel to fix this permanently .. [ 20.242636] pnp: PnP ACPI init [ 20.243507] pnp: PnPACPI: METHOD_NAME__CRS failure for PNP0a03 [ 20.246577] pnp: PnP ACPI: found 11 devices [ 20.246618] PCI: Using ACPI for IRQ routing [ 20.246621] PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report [ 20.246748] PCI-DMA: Disabling IOMMU. .. [ 20.285270] PCI: Setting latency timer of device 0000:00:02.0 to 64 [ 20.285275] pcie_portdrv_probe->Dev[5a34:1002] has invalid IRQ. Check vendor BIOS [ 20.285290] assign_interrupt_mode Found MSI capability [ 20.285330] Allocate Port Service[0000:00:02.0:pcie00] [ 20.285363] Allocate Port Service[0000:00:02.0:pcie01] [ 20.285392] PCI: Setting latency timer of device 0000:00:06.0 to 64 [ 20.285395] pcie_portdrv_probe->Dev[5a38:1002] has invalid IRQ. Check vendor BIOS [ 20.285410] assign_interrupt_mode Found MSI capability [ 20.285430] Allocate Port Service[0000:00:06.0:pcie00] [ 20.285455] Allocate Port Service[0000:00:06.0:pcie01].. .. [ 26.887398] irq 233: nobody cared (try booting with the "irqpoll" option) [ 26.887403] [ 26.887404] Call Trace: <IRQ> <ffffffff802b68a5>{__report_bad_irq+53} [ 26.887418] <ffffffff802b6b20>{note_interrupt+544} <ffffffff802b6190>{__do_IRQ+224} [ 26.887428] <ffffffff802737e2>{do_IRQ+66} <ffffffff80265d08>{ret_from_intr+0} <EOI> [ 26.887437] <ffffffff802089ff>{__handle_mm_fault+1391} <ffffffff8026b578>{_spin_unlock_irqrestore+8} [ 26.887447] <ffffffff8026d989>{do_page_fault+1273} <ffffffff8026580e>{system_call+126} [ 26.887459] <ffffffff802664a1>{error_exit+0} [ 26.887467] handlers: [ 26.887469] [<ffffffff8810c0c0>] (ohci_irq_handler+0x0/0x7ff [ohci1394]) [ 26.887480] Disabling IRQ #233 .. [ 39.748618] APIC error on CPU0: 00(40) [ 39.820528] Losing some ticks... checking if CPU frequency changed. .. [ 85.542940] ibm_acpi: ec object not found [ 85.571130] pcc_acpi: loading... .. [ 93.860670] ttyS0: LSR safety check engaged! .. [ 95.185772] ttyS1: LSR safety check engaged! .. [ 514.657380] APIC error on CPU0: 40(40) [ 514.658974] warning: many lost ticks. [ 514.658975] Your time source seems to be instable or some driver is hogging interupts [ 514.658991] rip acpi_processor_idle+0x1d9/0x466 [processor] [ 514.662171] APIC error on CPU0: 40(40) ** Attachment added: "Output of dmesg shortly after a clean bootup" http://librarian.launchpad.net/4930938/dmesg.txt -- APIC error on CPU0: 40(40) https://launchpad.net/bugs/66900 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs