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FromGeoff Hoff <>
SubjectA sound oops and Re: still sound problems....
DateTue, 17 Mar 1998 23:54:02 -0500
> The result is interesting too:
> yoda:~# modprobe sb
> /lib/modules/2.1.89/misc/sound.o: unresolved symbol unload_mpu401_R5febf284
> /lib/modules/2.1.89/misc/sound.o: unresolved symbol probe_mpu401_Rcd91465c
> /lib/modules/2.1.89/misc/sound.o: unresolved symbol attach_mpu401_Rb18f4f68
> sound: No such file or directory
> sound: No such file or directory
> 
> BTW anyone willing to send me his entrys in  /etc/conf.modules for a SB?

I just compiled and tested 2.1.90-pre3.  This is what I configured in the
sound section:

CONFIG_SOUND=m
CONFIG_SB=m

everything else I set to n.  All I want is /dev/audio and /dev/dsp.  The
relevent lines from my conf.modules are:

alias char-major-14 sb
options sb io=0x220 irq=10 dma=1 dma16=6

So then I do a modprobe sb and everything works fine.  Also, I didn't notice
any switching of stereo channels (this is with an mp3 I just made from an audio
cd, I even stuck the cd into my cdplayer and it sounded just the same on it as
through my sound blaster).  I do an lsmod and this is what was returned:

Module                  Size  Used by
sb                     22028   0
uart401                 5516   0  [sb]
sound                  63244   0  [sb uart401]

Works well for me.  The only difference I see is that I don't use module
versioning.

And while I'm at it this oops occured when doing an "modprobe -r sb"

kfree: Bad obj c4820000
Unable to handle kernel NULL pointer dereference at virtual address 00000000
current->tss.cr3 = 0368d000, ^Hr3 = 0368d000
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[<c01240b7>]
EFLAGS: 00010296
eax: 0000001b   ebx: c4820000   ecx: c3d6e000   edx: c01aee44
esi: c4819000   edi: c4820000   ebp: bffffd28   esp: c3529f54
ds: 0018   es: 0018   ss: 0018
Process rmmod (pid: 322, process nr: 35, stackpage=c3529000)
Stack: c01997fe c4820000 c4820000 c4819000 00000000 bffffd28 00000000 00000000
       00000000 c481b694 c4820000 c4819000 c481a532 c481e520 c481a66f c481e520
       c0119f4c c4819000 fffffff0 0804ef78 c011936a c4819000 00000000 c3528000
Call Trace: [<c01997fe>] [<c4820000>] [<c4820000>] [<c4819000>] [<c481b694>] [<c       [<c481a532>] [<c481e520>] [<c481a66f>] [<c481e520>] [<c0119f4c>] [<c48190       [<c0109f5a>]
Code: c7 05 00 00 00 00 00 00 00 00 83 c4 08 5b 5e 5f 5d 83 c4 0c
Using `/boot/System2.1.90.map' to map addresses to symbols.

>>EIP: c01240b7 <kfree+1c7/1dc>

Code: c01240b7 <kfree+1c7/1dc>
Code: c01240b7 <kfree+1c7/1dc>  c7 05 00 00 00  movl   $0x0,0x0
Code: c01240bc <kfree+1cc/1dc>  00 00 00 00 00
Code: c01240c7 <kfree+1d7/1dc>  83 c4 08        addl   $0x8,%esp
Code: c01240ca <kfree+1da/1dc>  5b              popl   %ebx
Code: c01240cb <kfree+1db/1dc>  5e              popl   %esi
Code: c01240cc <kfree_s>  5f                    popl   %edi
Code: c01240cd <kfree_s+1/1e0>  5d              popl   %ebp
Code: c01240ce <kfree_s+2/1e0>  83 c4 0c        addl   $0xc,%esp

Geoff Hoff

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