I just tried to boot a -current kernel cvsupped 
at Sat Jun  2 14:11:35 PDT 2001, and was thrown
the following error trying to boot to single-user
(transcribed by hand):

src/sys/kern/kern_sync.c:385 sleeping with "eventhandler" 
locked from src/sys/kern/subr_eventhandler:159

This came up immediately after  "Mounting root from ufs:/dev/ad0s2a"
and locked the box hard (no keyboard response, not even from the
"caps lock"), so I am unable to produce a trace. Included below is my
dmesg.boot from the old kernel.

Is there some trick to get -current to boot at the moment?

Please let me know if there is any further information I can provide
that would be of help.



----- dmesg.boot -----
Copyright (c) 1992-2001 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 5.0-CURRENT #6: Sun Apr 22 20:41:02 PDT 2001
    [EMAIL PROTECTED]:/usr/obj/usr/local/src/freebsd/src/sys/TAKHUS
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 750033375 Hz
CPU: AMD Athlon(tm) Processor (750.03-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x621  Stepping = 1
  AMD Features=0xc0400000<AMIE,DSP,3DNow!>
real memory  = 536788992 (524208K bytes)
avail memory = 517771264 (505636K bytes)
Preloaded elf kernel "kernel" at 0xc0425000.
Pentium Pro MTRR support enabled
Using $PIR table, 8 entries at 0xc00f0e50
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at 0.0 (no driver attached)
pci1: <display> at 1.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 4.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686 ATA66 controller> port 0xb800-0xb80f at device 4.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <VIA 83C572 USB controller> port 0xb400-0xb41f irq 7 at device 4.2 on pci0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <VIA 83C572 USB controller> port 0xb000-0xb01f irq 7 at device 4.3 on pci0
usb1: <VIA 83C572 USB controller> on uhci1
usb1: USB revision 1.0
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
ed0: <NE2000 PCI Ethernet (RealTek 8029)> port 0x9400-0x941f irq 3 at device 10.0 on 
ed0: address 52:54:05:fb:f4:9d, type NE2000 (16 bit) 
pcm0: <Creative EMU10K1> port 0x9000-0x901f irq 10 at device 11.0 on pci0
pcib2: <PCI-PCI bridge> at device 13.0 on pci0
pci2: <PCI bus> on pcib2
de0: <Digital 21140A Fast Ethernet> port 0x7800-0x787f mem 0xd6000000-0xd600007f irq 7 
at device 4.0 on pci2
de0: 21140A [10-100Mb/s] pass 2.0
de0: address 00:00:bc:11:0c:51
de1: <Digital 21140A Fast Ethernet> port 0x7400-0x747f mem 0xd5800000-0xd580007f irq 
11 at device 5.0 on pci2
de1: 21140A [10-100Mb/s] pass 2.0
de1: address 00:00:bc:11:0c:52
de2: <Digital 21140A Fast Ethernet> port 0x7000-0x707f mem 0xd5000000-0xd500007f irq 
10 at device 6.0 on pci2
de2: 21140A [10-100Mb/s] pass 2.0
de2: address 00:00:bc:11:0c:53
de3: <Digital 21140A Fast Ethernet> port 0x6800-0x687f mem 0xd4800000-0xd480007f irq 3 
at device 7.0 on pci2
de3: 21140A [10-100Mb/s] pass 2.0
de3: address 00:00:bc:11:0c:54
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model MouseMan+, device ID 0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
pmtimer0 on isa0
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0501> can't assign resources
unknown: <PNP0700> can't assign resources
unknown: <PNP0f13> can't assign resources
unknown: <PNP0303> can't assign resources
ad0: 19569MB <WDC WD205AA> [39761/16/63] at ata0-master UDMA66
acd0: CD-RW <SAMSUNG CD-R/RW SW-408B> at ata1-master PIO4
acd1: CDROM <TOSHIBA CD-ROM XM-6702B> at ata1-slave PIO4
Mounting root from ufs:/dev/ad0s2a
acquiring duplicate lock of same type: "allproc"
 1st @ /usr/local/src/freebsd/src/sys/kern/kern_proc.c:584
 2nd @ /usr/local/src/freebsd/src/sys/kern/kern_proc.c:143

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