Kernel panic during boot in usb_add_task

Michael Neumann mneumann at
Wed Nov 21 08:18:23 PST 2007

Bill Hacker schrieb:
Michael Neumann wrote:

I tried my brand new HP Compaq laptop 6710b under DragonFly, but 
during booting
the installer CD it "throws" a page fault:

  uhub0: 2 ports ...
  uhub0: <Intel UHCI root hub, ...>
  Fatal trap 12: page fault while in kernel mode
  fault virtual address = 0x0
  fault code            = supervisor write, page not present
  instruction pointer   = 0x8:0xc04a9c5c
  stack pointer         = 0x10:0xc25f8d38
  frame pointer         = 0x10:0xc25f8d48
  code segment          = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gram 1
  processor eflags      = interrupt enabled, resume, IOPL = 0
  current process       = Idle
  current thread        = pri 46 (CRIT)
  kernel: type 12, code=2
  stopped at       usb_add_task+0x4c:    movl     %edi,0(%eax)
This happens with the latest snapshot version as of yesterday and also 
with the
1.10 release.

FreeBSD 7.0-BETA3 silently hangs during boot, while NetBSD 4.0RC_4 
works like a charm (it can even dual-boot windows natively)!

Any hints?


For starters, what does NetBSD report as the hardware and can you 
capture *any* scan, dmesg, or other report from FreeBSD 7-BETA3 or DFLY?
Dmesg of NetBSD-4.0_RC4 is appended.

I can start FreeBSD 7-BETA3 if I disable the LAN in the BIOS and boot without 
ACPI as explained here:

I tried the same with DragonFly, but that didn't helped.

And have you tried DFLY and/or FreeBSD with the various boot options 
selected - or can you not get far enough to do so?
I can, but it doesn't help much. I tried "unset acpi_load", but that gives the 
same result (panic). Maybe a SATA problem I thought? But I disabled "native SATA 
mode" in BIOS, so I guess it's now seen by DF as a (P)ATA controller.

Well, I just wanted to share this, maybe this will help others. For now I don't 
want to install DF anyway, because of lack of Bluetooth and wpi (and probably 
X3100 graphics support).




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