Hi Colin, Disabling IO-APIC (kernel boot option noapic ) works for me and avoid going into crazy mode.
acpi=noirq is working well for me too ( DELL D630 A06) but it generates some warning messages during boot: ======= /var/log/messages ======= Apr 14 16:31:31 minquiers2 kernel: [ 14.829946] sysfs: duplicate filename 'bridge' can not be created Apr 14 16:31:31 minquiers2 kernel: [ 14.829949] WARNING: at /build/buildd/linux-2.6.24/fs/sysfs/dir.c:424 sysfs_add_one() Apr 14 16:31:31 minquiers2 kernel: [ 14.829951] Pid: 1, comm: swapper Not tainted 2.6.24-15-generic #1 Apr 14 16:31:31 minquiers2 kernel: [ 14.829954] [sysfs_add_one+0x9f/0xe0] sysfs_add_one+0x9f/0xe0 Apr 14 16:31:31 minquiers2 kernel: [ 14.829960] [usbcore:sysfs_create_link+0x8a/0x6f0] sysfs_create_link+0x8a/0x110 Apr 14 16:31:31 minquiers2 kernel: [ 14.829964] [shpchp:pci_bus_add_devices+0x9e/0x4f0] pci_bus_add_devices+0x9e/0x130 Apr 14 16:31:31 minquiers2 kernel: [ 14.829968] [pcibios_scan_root+0x1b/0x80] pcibios_scan_root+0x1b/0x80 Apr 14 16:31:31 minquiers2 kernel: [ 14.829972] [pci_legacy_init+0x51/0x100] pci_legacy_init+0x51/0x100 Apr 14 16:31:31 minquiers2 kernel: [ 14.829976] [kernel_init+0x131/0x320] kernel_init+0x131/0x320 Apr 14 16:31:31 minquiers2 kernel: [ 14.829979] [ret_from_fork+0x6/0x20] ret_from_fork+0x6/0x20 Apr 14 16:31:31 minquiers2 kernel: [ 14.829983] [kernel_init+0x0/0x320] kernel_init+0x0/0x320 Apr 14 16:31:31 minquiers2 kernel: [ 14.829985] [kernel_init+0x0/0x320] kernel_init+0x0/0x320 Apr 14 16:31:31 minquiers2 kernel: [ 14.829988] [kernel_thread_helper+0x7/0x10] kernel_thread_helper+0x7/0x10 [...] Apr 14 16:31:31 minquiers2 kernel: [ 14.959425] PCI: No IRQ known for interrupt pin A of device 0000:00:01.0. Please try using pci=biosirq. Apr 14 16:31:31 minquiers2 kernel: [ 14.959455] PCI: No IRQ known for interrupt pin A of device 0000:00:1c.0. Please try using pci=biosirq. Apr 14 16:31:31 minquiers2 kernel: [ 14.959486] PCI: No IRQ known for interrupt pin B of device 0000:00:1c.1. Please try using pci=biosirq. Apr 14 16:31:31 minquiers2 kernel: [ 14.959518] PCI: No IRQ known for interrupt pin B of device 0000:00:1c.5. Please try using pci=biosirq. [...] Apr 14 16:31:31 minquiers2 kernel: [ 15.553799] pcie_portdrv_probe->Dev[8086:2a01] has invalid IRQ. Check vendor BIOS ======= ======= I haven't check if it's harmless or not. Hence, disabling ACPI or IO-APIC for IRQ routing makes the problem disappear. Regarding this, can we still consider this as a ACPI issue ( broken DSDT) or a IRQ routing bug or kernel bug or else ? lspci -v and cat /proc/interrupts with and without acpi=noirq follows ** Attachment added: "lspci-v.default.log" http://launchpadlibrarian.net/13423360/lspci-v.default.log -- Powertop reports huge number of wakeups and drains battery https://bugs.launchpad.net/bugs/145377 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
