Re: recent 5.1-CURRENT kernel panics on acd0 probe/attach, IBM T30 laptop

From: Andre Guibert de Bruet <andy_at_siliconlandmark.com>
Date: Wed, 27 Aug 2003 14:58:51 -0400 (EDT)
On Wed, 27 Aug 2003, Lee Damon wrote:

> : || tylendel.castle.org [10] ; uname -a
> FreeBSD tylendel.castle.org 5.1-CURRENT FreeBSD 5.1-CURRENT #38: Wed Aug 27 09:05:21 PDT 2003     root_at_tylendel.castle.org:/users/FreeBSD-5.0/obj/users/FreeBSD-5.0/src/sys/TYLENDEL  i386
>
> The kernel I compiled on 20 AUG recognizes acd0 and loggs the following:
>
> Aug 27 08:24:10 tylendel kernel: acd0: CD-RW <UJDA720 DVD/CDRW> at ata1-master U
> DMA33
> Aug 27 08:24:10 tylendel kernel: cd0 at ata1 bus 0 target 0 lun 0
> Aug 27 08:24:10 tylendel kernel: cd0: <MATSHITA UJDA720 DVD/CDRW 1.03> Removable
>  CD-ROM SCSI-0 device
> Aug 27 08:24:10 tylendel kernel: cd0: 33.000MB/s transfers
> Aug 27 08:24:10 tylendel kernel: cd0: Attempt to query device size failed: NOT R
> EADY, Medium not present - tray closed
>
> However, kernels compiled since Monday's SUP get as far as the initial
> discovery of the acd0 device and then panic with:
>
> 	fatal trap 12: page fault while in kernel mode
> 	fault virtual address	= 0x0
> 	fault code		= supervisor write, page not present
> 	instruction pointer	= 0x8 :0xc015ca8e
> 	stack pointer		= 0x10 :0xdd79aaac
> 	frame pointer		= 0x10 :0xdd79aab8
> 	code segment		= base 0x0, limit 0xfffff, type 0x1b
> 				= DPL 0, pres 1, def 32 1, gran 1
> 	processor eflags	= interrupt enabled, resume, IOPL=0
> 	current process		= 19 (swi 3: cambio)
> 	kernel: type 12 trap, code=0
> 	Stopped at	free_hcb+0x2e:	mov1	%eax,0(xedx)
>
> When I remove the DVD/CDRW from the system it boots.

Try booting with an ISO 9660 image in the drive. Does it make any
difference?

I've spotted this behavior with a brand-new SONY DRU-510A (Version "BA").

Regards,

> Andre Guibert de Bruet | Enterprise Software Consultant >
> Silicon Landmark, LLC. | http://siliconlandmark.com/    >
Received on Wed Aug 27 2003 - 09:59:13 UTC

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