Dear Developers, I'm trying to install last FreeBSD 12.0-RELEASE in an old i386 previously supported without trouble by some old FreeBSD Release. I modified the /boot/loader.conf from the install memstick media due to the fact that this is an appliance without screen and keyboard and only serial console. Modified appended to /boot/loader.conf: boot_multicons="YES" boot_serial="YES" comconsole_speed="19200" console="comconsole,vidconsole" kern.cam.boot_delay="10000" I tried to add this line to the /boot/loader.conf as discribed in documentation to disable ACPI APIC hint.apic.0.disabled="1" Here are the details of the kernel panic: Copyright (c) 1992-2018 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 is a registered trademark of The FreeBSD Foundation. FreeBSD 12.0-RELEASE r341666 GENERIC i386 FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based on LLVM 6.0.1) VT(vga): resolution 640x480 CPU: AMD-K6(tm) 3D processor (400.92-MHz 586-class CPU) Origin="AuthenticAMD" Id=0x58c Family=0x5 Model=0x8 Stepping=12 Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX> AMD Features=0x80000800<SYSCALL,3DNow!> real memory = 268435456 (256 MB) avail memory = 225329152 (214 MB) arc4random: no preloaded entropy cache Timecounter "TSC" frequency 400920213 Hz quality 800 random: entropy device external interface kbd1 at kbdmux0 K6-family MTRR support enabled (2 registers) [ath_hal] loaded module_register_init: MOD_LOAD (vesa, 0x15f8f40, 0) error 19 vtvga0: <VT VGA driver> on motherboard cryptosoft0: <software crypto> on motherboard pcib0 pcibus 0 on motherboard pir0: <PCI Interrupt Routing Table: 7 Entries> on motherboard pci0: <PCI bus> on pcib0 isab0: <PCI-ISA bridge> at device 7.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <Intel PIIX4 UDMA33 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f at device 7.1 on pci0 ata0: <ATA channel> at channel 0 on atapci0 ata1: <ATA channel> at channel 1 on atapci0 uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0x6400-0x641f irq 11 at device 7.2 on pci0 usbus0 on uhci0 piix0: <PIIX Timecounter> port 0x6200-0x620f at device 7.3 on pci0 Timecounter "PIIX" frequency 3579545 Hz quality 0 fxp0: <Intel 82558 Pro/100 Ethernet> port 0x6800-0x681f mem 0xe0300000-0xe0300fff,0xe0000000-0xe00fffff irq 10 at device 13.0 on p0 fxp0: EEPROM checksum mismatch! (0xbbb9 -> 0xffff) miibus0: <MII bus> on fxp0 inphy0: <i82555 10/100 media interface> PHY 1 on miibus0 inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, auto-flow fxp0: Ethernet address: ff:ff:ff:ff:ff:ff fxp1: <Intel 82558 Pro/100 Ethernet> port 0x6c00-0x6c1f mem 0xe0302000-0xe0302fff,0xe0100000-0xe01fffff irq 12 at device 14.0 on p0 fxp1: EEPROM checksum mismatch! (0xbbb9 -> 0xffff) miibus1: <MII bus> on fxp1 inphy1: <i82555 10/100 media interface> PHY 1 on miibus1 inphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, auto-flow fxp1: Ethernet address: ff:ff:ff:ff:ff:ff fxp2: <Intel 82558 Pro/100 Ethernet> port 0x7000-0x701f mem 0xe0301000-0xe0301fff,0xe0200000-0xe02fffff irq 5 at device 15.0 on pc0 fxp2: EEPROM checksum mismatch! (0xbbb9 -> 0xffff) miibus2: <MII bus> on fxp2 inphy2: <i82555 10/100 media interface> PHY 1 on miibus2 inphy2: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, auto-flow fxp2: Ethernet address: ff:ff:ff:ff:ff:ff pcib1: <PCI-PCI bridge> at device 16.0 on pci0 pci1: <PCI bus> on pcib1 dc0: <Intel 21143 10/100BaseTX> port 0xe000-0xe07f mem 0xd8000000-0xd80003ff irq 10 at device 5.0 on pci1 miibus3: <MII bus> on dc0 dcphy0: <Intel 21143 NWAY media interface> PHY 31 on miibus3 dcphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto dc0: Ethernet address: 00:c0:95:c4:9c:90 dc1: <Intel 21143 10/100BaseTX> port 0xe400-0xe47f mem 0xd8001000-0xd80013ff irq 12 at device 6.0 on pci1 miibus4: <MII bus> on dc1 dcphy1: <Intel 21143 NWAY media interface> PHY 31 on miibus4 dcphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto dc1: Ethernet address: 00:c0:95:c4:9c:91 cpu0 on motherboard attimer0: <AT timer> at port 0x40-0x43 irq 0 pnpid PNP0100 on isa0 Timecounter "i8254" frequency 1193182 Hz quality 0 Event timer "i8254" frequency 1193182 Hz quality 100 atrtc0: <AT realtime clock> at port 0x70-0x71 irq 8 pnpid PNP0b00 on isa0 atrtc0: registered as a time-of-day clock, resolution 1.000000s Event timer "RTC" frequency 32768 Hz quality 0 atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 irq 1 pnpid PNP0303 on isa0 atkbd0: <AT Keyboard> irq 1 on atkbdc0 kbd0 at atkbd0 atkbd0: [GIANT-LOCKED] unknown: <PNP0c01> can't assign resources (memory) unknown: <PNP0a03> can't assign resources (port) uart0: <16550 or compatible> at port 0x3f8-0x3ff irq 4 flags 0x10 pnpid PNP0501 on isa0 uart0: console (19200,n,8,1) uart1: <16550 or compatible> at port 0x2f8-0x2ff irq 3 pnpid PNP0501 on isa0 fdc0: <Enhanced floppy controller> at port 0x3f2-0x3f5,0x3f7 irq 6 drq 2 pnpid PNP0700 on isa0 ppc0: <ECP parallel printer port> at port 0x378-0x37f,0x778-0x77a irq 7 drq 3 pnpid PNP0401 on isa0 ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode ppc0: FIFO with 16/16/8 bytes threshold ppbus0: <Parallel port bus> on ppc0 lpt0: <Printer> on ppbus0 lpt0: Interrupt-driven port ppi0: <Parallel I/O> on ppbus0 psmcpnp0: irq resource info is missing; assuming irq 12 panic: resource_list_release: resource entry is not busy cpuid = 0 time = 1 KDB: stack backtrace: #0 0x110854f at kdb_backtrace+0x4f #1 0x10bb517 at vpanic+0x147 #2 0x10bb3cb at panic+0x1b #3 0x10f88a1 at resource_list_release+0x1d1 #4 0x16a4b7c at isa_release_resource+0x3c #5 0x10f8cc5 at bus_release_resource+0x65 #6 0x159f57c at psmcpnp_probe+0x24c #7 0x10f6835 at device_probe_child+0x165 #8 0x10f7597 at device_probe+0x77 #9 0x10f7622 at device_probe_and_attach+0x12 #10 0x1044cd2 at isa_probe_children+0x132 #11 0x16a794a at configure+0x1a #12 0x1053507 at mi_startup+0xf7 #13 0x8f805f at btext+0x5f Uptime: 1s Automatic reboot in 15 seconds - press a key on the console to abort --> Press a key on the console to reboot, --> or switch off the system now. Kind Regards