>> Somebody knows if this problem only happends on Intel X58/5500/5600 chipsets ? Did somebody tried the i386 version of OpenBSD 4.7 ?
I am running 4.7 i386 release (+ errata patches) on a Intel 5500 platform with the following Intel NIC. Seems to be behaving itself so far. (Sorry no dmesg, it got overwritten by system events, so you'll have to wait until I get a chance to reboot....). 10:0:0: Intel PRO/1000 PT (82571EB) 0x0000: Vendor ID: 8086 Product ID: 105e 0x0004: Command: 0047 Status ID: 0010 0x0008: Class: 02 Subclass: 00 Interface: 00 Revision: 06 0x000c: BIST: 00 Header Type: 80 Latency Timer: 00 Cache Line Size: 10 0x0010: BAR mem 32bit addr: 0xfbfe0000 0x0014: BAR mem 32bit addr: 0xfbfc0000 0x0018: BAR io addr: 0x00004000 0x001c: BAR empty (00000000) 0x0020: BAR empty (00000000) 0x0024: BAR empty (00000000) 0x0028: Cardbus CIS: 00000000 0x002c: Subsystem Vendor ID: 8086 Product ID: 115e 0x0030: Expansion ROM Base Address: 00000000 0x0038: 00000000 0x003c: Interrupt Pin: 01 Line: 07 Min Gnt: 00 Max Lat: 00 0x00c8: Capability 0x01: Power Management 0x00d0: Capability 0x05: Message Signaled Interrupts (MSI) 0x00e0: Capability 0x10: PCI Express 10:0:1: Intel PRO/1000 PT (82571EB) 0x0000: Vendor ID: 8086 Product ID: 105e 0x0004: Command: 0047 Status ID: 0010 0x0008: Class: 02 Subclass: 00 Interface: 00 Revision: 06 0x000c: BIST: 00 Header Type: 80 Latency Timer: 00 Cache Line Size: 10 0x0010: BAR mem 32bit addr: 0xfbfa0000 0x0014: BAR mem 32bit addr: 0xfbf80000 0x0018: BAR io addr: 0x00004020 0x001c: BAR empty (00000000) 0x0020: BAR empty (00000000) 0x0024: BAR empty (00000000) 0x0028: Cardbus CIS: 00000000 0x002c: Subsystem Vendor ID: 8086 Product ID: 115e 0x0030: Expansion ROM Base Address: 00000000 0x0038: 00000000 0x003c: Interrupt Pin: 02 Line: 0b Min Gnt: 00 Max Lat: 00 0x00c8: Capability 0x01: Power Management 0x00d0: Capability 0x05: Message Signaled Interrupts (MSI) 0x00e0: Capability 0x10: PCI Express