Hi Czeslaw, Can you try the attached patch? You'll have to do a make in sys/dev/pci after you've applied the patch.
Index: dev/pci/pcidevs =================================================================== RCS file: /cvs/src/sys/dev/pci/pcidevs,v retrieving revision 1.1139 diff -u -p -r1.1139 pcidevs --- dev/pci/pcidevs 25 Aug 2006 04:26:29 -0000 1.1139 +++ dev/pci/pcidevs 11 Sep 2006 15:45:17 -0000 @@ -1203,6 +1203,7 @@ product COMPAQ CSA6400 0x409c Smart Arr product COMPAQ CSA6400EM 0x409d Smart Array 6400 EM product COMPAQ CSA6422 0x409e Smart Array 6422 product COMPAQ CSA64XX 0x0046 Smart Array 64xx +product COMPAQ HOTPLUG_PCI 0x6010 Hotplug PCI product COMPAQ USB 0x7020 USB product COMPAQ FXP 0xa0f0 Netelligent ASMC product COMPAQ PCI_ISA_BRIDGE1 0xa0f3 ISA Index: arch/i386/pci/pchb.c =================================================================== RCS file: /cvs/src/sys/arch/i386/pci/pchb.c,v retrieving revision 1.52 diff -u -p -r1.52 pchb.c --- arch/i386/pci/pchb.c 13 Mar 2006 20:10:49 -0000 1.52 +++ arch/i386/pci/pchb.c 11 Sep 2006 15:45:17 -0000 @@ -220,6 +220,27 @@ pchbattach(parent, self, aux) break; } break; + case PCI_VENDOR_COMPAQ: + switch (PCI_PRODUCT(pa->pa_id)) { + case PCI_PRODUCT_COMPAQ_HOTPLUG_PCI: + pbnum = pci_conf_read(pa->pa_pc, pa->pa_tag, 0xc8); + + /* + * This host bridge has a second PCI bus. + * Configure it. + */ + neednl = 0; + pba.pba_busname = "pci"; + pba.pba_iot = pa->pa_iot; + pba.pba_memt = pa->pa_memt; + pba.pba_dmat = pa->pa_dmat; + pba.pba_bus = pbnum; + pba.pba_bridgetag = NULL; + pba.pba_pc = pa->pa_pc; + printf("\n"); + config_found(self, &pba, pchb_print); + } + break; case PCI_VENDOR_RCC: bdnum = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x44); if (bdnum >= (sizeof(rcc_bus_visited) * 8) ||