When trying to upgrade a 5.2.1-REL machine to 5.4, I get an 'Interrupt storm detected on IRQ 11 fxp0 fxp1' message right after 'Waiting for SCSI devices to settle', and a freeze after that. As far as I can tell from the 5.2.1 boot messages, IRQ11 is actually allocated to the asr controller. Is this a known issue? Anything I should try? 5.2.1 dmesg output below. Thomas. Copyright (c) 1992-2004 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.2.1-RELEASE-p9 #2: Wed Sep 15 20:39:57 CEST 2004 root@alexandria:/usr/obj/usr/src/RELENG_5_2/sys/MYKERNEL Preloaded elf kernel "/boot/kernel.old/kernel" at 0xc099a000. Preloaded elf module "/boot/kernel/acpi.ko" at 0xc099a270. link_elf: symbol device_get_sysctl_tree undefined KLD file acpi.ko - could not finalize loading Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Pentium(R) III CPU family 1266MHz (1263.45-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x6b1 Stepping = 1 Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE> real memory = 1342111744 (1279 MB) avail memory = 1295372288 (1235 MB) Pentium Pro MTRR support enabled npx0: [FAST] npx0: <math processor> on motherboard npx0: INT 16 interface pcibios: BIOS version 2.10 Using $PIR table, 13 entries at 0xc00f3bc0 pcib1: <ServerWorks host to PCI bridge> at pcibus 1 on motherboard pci1: <PCI bus> on pcib1 pci_cfgintr: 1:7 INTA BIOS irq 7 pci_cfgintr: 1:7 INTB BIOS irq 9 pci_cfgintr: 1:9 INTA BIOS irq 11 ahc0: <Adaptec aic7899 Ultra160 SCSI adapter> port 0x2400-0x24ff mem 0xfeae0000-0xfeae0fff irq 7 at device 7.0 on pci1 aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs ahc1: <Adaptec aic7899 Ultra160 SCSI adapter> port 0x2000-0x20ff mem 0xfeaf0000-0xfeaf0fff irq 9 at device 7.1 on pci1 aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs pcib2: <PCI-PCI bridge> at device 9.0 on pci1 pci2: <PCI bus> on pcib2 asr0: <Adaptec Caching SCSI RAID> mem 0xfa000000-0xfbffffff irq 11 at device 9.1 on pci1 asr0: major=154 asr0: ADAPTEC 3210S FW Rev. 370F, 2 channel, 256 CCBs, Protocol I2O pcib0: <ServerWorks host to PCI bridge> at pcibus 0 on motherboard pci0: <PCI bus> on pcib0 pci_cfgintr: 0:3 INTA BIOS irq 10 pci_cfgintr: 0:4 INTA BIOS irq 5 pci_cfgintr: 0:12 INTA BIOS irq 11 pci_cfgintr: 0:15 INTA BIOS irq 10 fxp0: <Intel 82550 Pro/100 Ethernet> port 0x1400-0x143f mem 0xfe8a0000-0xfe8bffff,0xfe8e0000-0xfe8e0fff irq 10 at device 3.0 on pci0 fxp0: Ethernet address 00:03:47:f1:52:de miibus0: <MII bus> on fxp0 inphy0: <i82555 10/100 media interface> on miibus0 inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto fxp1: <Intel 82550 Pro/100 Ethernet> port 0x1440-0x147f mem 0xfe860000-0xfe87ffff,0xfe880000-0xfe880fff irq 5 at device 4.0 on pci0 fxp1: Ethernet address 00:03:47:f1:52:e1 miibus1: <MII bus> on fxp1 inphy1: <i82555 10/100 media interface> on miibus1 inphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto pci0: <display, VGA> at device 12.0 (no driver attached) isab0: <PCI-ISA bridge> at device 15.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <ServerWorks CSB5 UDMA100 controller> port 0x410-0x413,0x3a0-0x3af,0-0x3,0-0x7,0-0x3,0-0x7 at device 15.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata0: [MPSAFE] ata1: at 0x170 irq 15 on atapci0 ata1: [MPSAFE] ohci0: <OHCI (generic) USB controller> mem 0xfe840000-0xfe840fff irq 10 at device 15.2 on pci0 usb0: OHCI version 1.0, legacy support usb0: SMM does not respond, resetting usb0: <OHCI (generic) USB controller> on ohci0 usb0: USB revision 1.0 uhub0: (0x1166) OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 4 ports with 4 removable, self powered pcib3: <ServerWorks host to PCI bridge> at pcibus 3 on motherboard pci3: <PCI bus> on pcib3 pci_cfgintr: 3:9 INTA BIOS irq 11 em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.19> port 0x3000-0x303f mem 0xfebe0000-0xfebfffff irq 11 at device 9.0 on pci3 em0: Speed:1000 Mbps Duplex:Full orm0: <Option ROMs> at iomem 0xe4000-0xe7fff,0xd1000-0xd6fff,0xcb000-0xd0fff,0xc9800-0xcafff,0xc8000-0xc97ff,0xc0000-0xc7fff on isa0 pmtimer0 on isa0 atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0 fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 ppc0: parallel port not found. sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x100> sio0 at port 0x3f8-0x3ff irq 4 on isa0 sio0: type 16550A sio1 at port 0x2f8-0x2ff irq 3 flags 0x10 on isa0 sio1: type 16550A, console vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 unknown: <PNP0303> can't assign resources (port) unknown: <PNP0501> can't assign resources (port) unknown: <PNP0501> can't assign resources (port) unknown: <PNP0700> can't assign resources (port) Timecounter "TSC" frequency 1263452498 Hz quality 800 Timecounters tick every 10.000 msec IP Filter: v3.4.31 initialized. Default = pass all, Logging = enabled Waiting 3 seconds for SCSI devices to settle GEOM: create disk da4 dp=0xc720b850 GEOM: create disk da5 dp=0xc720c450 GEOM: create disk da6 dp=0xc720d050 GEOM: create disk da7 dp=0xc7204c50 GEOM: create disk da8 dp=0xc7206850 GEOM: create disk da9 dp=0xc7207450 GEOM: create disk da0 dp=0xc7208050 GEOM: create disk da1 dp=0xc7208c50 GEOM: create disk da2 dp=0xc71fe850 GEOM: create disk da3 dp=0xc7201450 GEOM: create disk cd0 dp=0xc6f90600 pass9 at asr0 bus 0 target 6 lun 0 pass9: <ESG-SHV SCA HSBP M16 0.05> Fixed Processor SCSI-2 device pass11 at asr0 bus 1 target 15 lun 0 pass11: <Adaptec DuraStor 312R 1.05> Fixed Processor SCSI-2 device da0 at asr0 bus 0 target 0 lun 0 da0: <ADAPTEC RAID-1 370F> Fixed Direct Access SCSI-2 device da0: Tagged Queueing Enabled da0: 17501MB (35842048 512 byte sectors: 255H 63S/T 2231C) da1 at asr0 bus 0 target 2 lun 0 da1: <ADAPTEC RAID-0 370F> Fixed Direct Access SCSI-2 device da1: Tagged Queueing Enabled da1: 280026MB (573493248 512 byte sectors: 255H 63S/T 35698C) da2 at asr0 bus 0 target 4 lun 0 da2: <ADAPTEC RAID-0 370F> Fixed Direct Access SCSI-2 device da2: Tagged Queueing Enabled da2: 280026MB (573493248 512 byte sectors: 255H 63S/T 35698C) da3 at asr0 bus 1 target 1 lun 0 da3: <ADAPTEC RAID-5 370F> Fixed Direct Access SCSI-2 device da3: Tagged Queueing Enabled da3: 350745MB (718325760 512 byte sectors: 255H 63S/T 44713C) da4 at ahc0 bus 0 target 1 lun 0 da4: <IFT IFT-7250 331I> Fixed Direct Access SCSI-4 device da4: 160.000MB/s transfers (80.000MHz, offset 62, 16bit), Tagged Queueing Enabled da4: 478224MB (979402752 512 byte sectors: 255H 63S/T 60965C) da5 at ahc0 bus 0 target 1 lun 1 da5: <IFT IFT-7250 331I> Fixed Direct Access SCSI-4 device da5: 160.000MB/s transfers (80.000MHz, offset 62, 16bit), Tagged Queueing Enabled da5: 478224MB (979402752 512 byte sectors: 255H 63S/T 60965C) da6 at ahc0 bus 0 target 1 lun 2 da6: <IFT IFT-7250 331I> Fixed Direct Access SCSI-4 device da6: 160.000MB/s transfers (80.000MHz, offset 62, 16bit), Tagged Queueing Enabled da6: 478222MB (979398656 512 byte sectors: 255H 63S/T 60964C) da7 at ahc0 bus 0 target 1 lun 3 da7: <IFT IFT-7250 331I> Fixed Direct Access SCSI-4 device da7: 160.000MB/s transfers (80.000MHz, offset 62, 16bit), Tagged Queueing Enabled da7: 478224MB (979402752 512 byte sectors: 255H 63S/T 60965C) da8 at ahc0 bus 0 target 1 lun 4 da8: <IFT IFT-7250 331I> Fixed Direct Access SCSI-4 device da8: 160.000MB/s transfers (80.000MHz, offset 62, 16bit), Tagged Queueing Enabled da8: 478224MB (979402752 512 byte sectors: 255H 63S/T 60965C) da9 at ahc0 bus 0 target 1 lun 5 da9: <IFT IFT-7250 331I> Fixed Direct Access SCSI-4 device da9: 160.000MB/s transfers (80.000MHz, offset 62, 16bit), Tagged Queueing Enabled da9: 478224MB (979402752 512 byte sectors: 255H 63S/T 60965C) cd0 at ata0 bus 0 target 0 lun 0 cd0: <SAMSUNG CD-ROM SN-124 QM15> Removable CD-ROM SCSI-0 device cd0: 3.300MB/s transfers cd0: Attempt to query device size failed: NOT READY, Medium not present