Oups... Correct version with attachement. Sorry. When booting a 4.2-current kernel on a HP Compaq dc7800, the system crashes if ACPI is enabled (this is by default with current).
Attached a dmesg. I can test patches if necessary. The same problem arises on Linux 2.6, so this might be related to the BIOS. Sincerely, Aurelien. OpenBSD 4.2-current (GENERIC) #657: Mon Feb 11 19:17:03 MST 2008 [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel(R) Core(TM)2 Duo CPU E4400 @ 2.00GHz ("GenuineIntel" 686-class) 2 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,EST,TM2,CX16,xTPR real mem = 2116313088 (2018MB) avail mem = 2038419456 (1943MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 07/18/07, BIOS32 rev. 0 @ 0xe8790, SMBIOS rev. 2.5 @ 0xea0c0 (76 entries) bios0: vendor Hewlett-Packard version "786F1 v01.04" date 07/18/2007 bios0: Hewlett-Packard HP Compaq dc7800 Convertible Minitower acpi0 at bios0: rev 0 acpi0: tables DSDT FACP APIC ASF! MCFG TCPA SLIC HPET DMAR acpi0: wakeup devices COM1(S4) COM2(S4) PCI0(S4) PEG1(S4) PEG2(S4) IGBE(S4) PCX1(S4) PCX2(S4) PCX5(S4) PCX6(S4) HUB_(S4) USB1(S3) USB2(S3) USB3(S3) USB4(S3) USB5(S3) USB6(S3) EUS1(S3) EUS2(S3) PBTN(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0 [\DCHM] 0xd28b6544 cnt:02 stk:00 field: bitpos=19f8 bitlen=0120 ref1:d28a6004 ref2:0 [Field] [\BIOS] 0xd28a6004 cnt:99 stk:00 opregion: 00,000e5c40,1fcb wrong setbufint type 5 216f Called: \GDBF arg0: 0xd286e710 cnt:01 stk:00 objref: 0xd28b6544 index:ffffffff [\DCHM] 0xd28b6544 cnt:02 stk:00 field: bitpos=19f8 bitlen=0120 ref1:d28a6004 ref2:0 [Field] [\BIOS] 0xd28a6004 cnt:99 stk:00 opregion: 00,000e5c40,1fcb arg1: 0xd286e73c cnt:01 stk:00 objref: 0xd28dbc3c index:ffffffff 0xd28dbc3c cnt:00 stk:61 integer: 0 2487 Called: \_SB_.PCI0._CRS local0: 0xd28dbc10 cnt:00 stk:60 integer: d0 local1: 0xd28dbc3c cnt:00 stk:61 integer: 0 panic: aml_die aml_setbufint:988 Stopped at Debugger+0x4: leave Debugger(d0789a90,d28c2e90,d090b578,8,160) at Debugger+0x4 panic(d077d955,d077da34,3dc,d28dbc10,d28a6004) at panic+0x63 _aml_die(d077da34,3dc,d077da1b,5,d28b6544,0,d090b5d8,d0445ca9) at _aml_die+0x46 aml_setbufint(d28dd9d0,0,20,d28b6544) at aml_setbufint+0x38 aml_fieldio(d28ddc04,d28ddb84,d28dd9d0,0,d28ddc04) at aml_fieldio+0x5f aml_derefvalue(d28ddc04,d28ddb84,0,d28dda10,d28dda50) at aml_derefvalue+0xcb aml_evalterm(d28ddc04,d28dda10,d28dda50,d0672eb1,38) at aml_evalterm+0x20 aml_parseterm(d28ddc04,d28dda50,d090b738,d05ce28d,d28ddc04) at aml_parseterm+0x37 aml_parseref(d28ddc04,a4,d28dda90,7d) at aml_parseref+0x27e aml_parseop(d28ddc04,d28dda90,74) at aml_parseop+0xe6 RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC! DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION! ddb> ps PID PPID PGRP UID S FLAGS WAIT COMMAND * 0 -1 0 0 7 0x80200 swapper ddb> trace Debugger(d0789a90,d28c2e90,d090b578,8,160) at Debugger+0x4 panic(d077d955,d077da34,3dc,d28dbc10,d28a6004) at panic+0x63 _aml_die(d077da34,3dc,d077da1b,5,d28b6544,0,d090b5d8,d0445ca9) at _aml_die+0x46 aml_setbufint(d28dd9d0,0,20,d28b6544) at aml_setbufint+0x38 aml_fieldio(d28ddc04,d28ddb84,d28dd9d0,0,d28ddc04) at aml_fieldio+0x5f aml_derefvalue(d28ddc04,d28ddb84,0,d28dda10,d28dda50) at aml_derefvalue+0xcb aml_evalterm(d28ddc04,d28dda10,d28dda50,d0672eb1,38) at aml_evalterm+0x20 aml_parseterm(d28ddc04,d28dda50,d090b738,d05ce28d,d28ddc04) at aml_parseterm+0x37 aml_parseref(d28ddc04,a4,d28dda90,7d) at aml_parseref+0x27e aml_parseop(d28ddc04,d28dda90,74) at aml_parseop+0xe6 aml_parseterm(d28ddc04,d286e768,390,d05ce28d,d28ddc04) at aml_parseterm+0x2c aml_callmethod(d28ddc04,d286e768,d28ab19b,d28c1644,d28da244) at aml_callmethod+0x26 aml_evalmethod(d28da244,d28c1644,2,d286e710,d286e768,d286e73c,74,d286e710) at aml_evalmethod+0x41 aml_derefvalue(d28da244,d28c1604,1,101) at aml_derefvalue+0x8d aml_derefvalue(d28da244,d28ddc50,0,d28ddc50,d28ddcd0) at aml_derefvalue+0xf6 aml_evalterm(d28da244,d28ddc50,d28ddcd0,d0672eb1,38) at aml_evalterm+0x20 aml_parseterm(d28da244,d28ddcd0,d090b8f8) at aml_parseterm+0x37 aml_parseref(d28da244,70,d28ddcd0,a9) at aml_parseref+0xeb aml_parseop(d28da244,d28ddcd0,74) at aml_parseop+0xe6 aml_parseterm(d28da244,d090ba20,390,30,d28da244) at aml_parseterm+0x2c aml_callmethod(d28da244,d090ba20,d28ab540,d28c2e84,d077eae2) at aml_callmethod+0x26 aml_evalmethod(0,d28c2e84,0,0,d090ba20) at aml_evalmethod+0x41 aml_evalnode(d28a7e00,d28c2e84,0,0,d090ba20,d090ba20,64,d2894110) at aml_evalnode+0xc7 acpiprt_getpcibus(d28d95c0,d28bca44,d090bac8,d2894120,0) at acpiprt_getpcibus+0x30 acpiprt_attach(d28a7e00,d28d95c0,d090bb50,d28a7e00,d28a7e00) at acpiprt_attach+0x22 config_attach(d28a7e00,d0784288,d090bb50,d0670af4) at config_attach+0xfd acpi_foundprt(d28bca44,d28a7e00,d06702f8,d28a7e00,0) at acpi_foundprt+0x95 aml_find_node(d28b9844,d077d357,d06702f8,d28a7e00) at aml_find_node+0x6e aml_find_node(d28b9944,d077d357,d06702f8,d28a7e00) at aml_find_node+0x5f aml_find_node(d28a6e04,d077d357,d06702f8,d28a7e00,d28a6e04,d077d352,d0670270,d28a7e00) at aml_find_node+0x5f acpi_attach(d28a6f80,d28a7e00,d090bd50,d28a6f80,0) at acpi_attach+0x431 config_attach(d28a6f80,d0784144,d090bd50,d0602824) at config_attach+0xfd biosattach(d28a6fc0,d28a6f80,d090be80,d28a6fc0,d0202251) at biosattach+0x33a config_attach(d28a6fc0,d07833a0,d090be80,d04a4200,d06d1518) at config_attach+0xfd mainbus_attach(0,d28a6fc0,0,e605a000,d090a334) at mainbus_attach+0x3d config_attach(0,d0780cf4,0,0,0) at config_attach+0xfd config_rootfound(d06cfd8b,0,d090bf38,d0477ca2) at config_rootfound+0x27 cpu_configure(d0877b60,1,3,0,2) at cpu_configure+0x29 main(0,0,0,0,0) at main+0x389 ddb>