From owner-freebsd-bugs  Thu May 18  4:10: 6 2000
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Date: Thu, 18 May 2000 13:06:08 +0200 (CEST)
From: Thiemo Nordenholz <nz@thiemo.net>
To: FreeBSD-gnats-submit@freebsd.org
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Subject: kern/18650: panic when enabling linux with emu10k1 driver installed (SMP)
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>Number:         18650
>Category:       kern
>Synopsis:       panic when enabling linux with emu10k1 driver installed (SMP)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu May 18 04:10:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Thiemo Nordenholz <nz@thiemo.net>
>Release:        FreeBSD 4.0-RELEASE i386
>Organization:
University of Technology, Clausthal, Germany
>Environment:

I guess these are the relevant things: ASUS P2B-DS with 2*P-II/400, SMP
enabled in FreeBSD, SB AWE64 sound card, SB Live! sound card. Full dmesg
output can be mailed, if necessary.

>Description:

Today I've added the emu10k1 driver to my kernel after cvsup'ing the sys
collection (as described in freebsd-questions). Before this, the machine was
running perfectly in SMP mode, with linux emulation enabled, and playing
music over the (also installed) AWE64. But now i wanted to have two sound
cards supported.
After booting the new kernel in single-user mode, i could use the SB Live!
to output sound, trying a "mixer" on the AWE64 device gave something like
"device busy" and did nothing. mpg123 worked well with the Live! device,
while the AWE64 remained silent, but the machine stayed alive, so I went
multi-user.
When rc.i386 turned on the linux emulation, the machine went to the kernel
debugger and printed the following messages (which don't really clue me up):
	Fatal trap 12: page fault while in kernel mode
	mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
	fault virtual address = 0x0
	fault code = supervisor read, page not present
	instruction pointer = 0x8:0xc0e85dbb
	stack pointer = 0x10:0xcd23cf0c
	frame pointer = 0x10:0xcd23cf28
	code segment = base 0x0, limit 0xfffff, type 0x1b
	             = DPL 0, pres 1, def32 1, gran 1
	processor eflags = interrupt enable, resume, IOPL=0
	current process = 145 (ldconfig)
	interrupt mask = none <- SMP:XXX
	kernel: type 12 trap, code=0
	Stopped at linux_open+0x23  subl 0(%edx),%eax

>How-To-Repeat:

Only tried this on my machine, as described, I don't know any other computer
with this hardware configuration and FreeBSD 4

>Fix:

Sorry, no clue.



>Release-Note:
>Audit-Trail:
>Unformatted:


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