I'm reporting a problem that has plagued me for many kernels. The
quick summary: If I am burning a CD-R using cdrecord (my burner is
an HP 8100i, internal IDE, so I'm using the ide-scsi module) while
playing music through /dev/dsp (soundcard is a SoundBlaster AWE64), my
machine will lock solid after an indefinite period of time. This is
reproducable; I've made a few coasters this way, in fact I just did
again which prompted me to write this. The lockup does not respond to
alt-sysrq keys or anything else but a hard reboot. When it occurs the
cd burner stops burning, music stops playing, I start swearing.  I have
gotten used to just not playing music while burning CDs but every couple
of kernels I try it again hoping my problem is cured but to no avail.

I never get this problem by only burning a CD or only playing music
through /dev/dsp, both have to be occuring simultaneously for this to
happen, and those simultaneous events appear to be completely sufficient
for the lockup to occur.  I can sometimes get away with playing music
for a few minutes while burning a CD and then stopping the music,
and then there is no problem.  I have an external removable drive
(Castelwood ORB) which is SCSI and does not need to be mounted/detected
for this to occur.

Unfortunately no messages appear in any of my logs when this occurs.  Is
there a way to run the kernel through a debugger, maybe that would shed
some light? I am not a kernel hacker, apologies for sounding dumb.

I will now barf out lots of stuff, apologies if it's not sufficient. I
am not currently subscribed to the kernel list, please Cc: to
[EMAIL PROTECTED] I will be happy to supply any more information or to
try any suggestions.

My current flavor of Linux is redhat 7 with all upgrades as of today
(oct. 14).

home[1001]:/home/orf% uname -a
Linux ci225670-a.ashvil1.nc.home.com 2.2.17 #2 Sat Sep 9 15:30:32 EDT
2000 i586 unknown

home[1002]:/home/orf% lspci
00:00.0 Host bridge: Intel Corporation 430TX - 82439TX MTXC (rev 01)
00:01.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 01)
00:01.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
00:01.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
00:01.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 01)
00:09.0 Ethernet controller: Lite-On Communications Inc LNE100TX (rev 20)
00:0b.0 SCSI storage controller: Adaptec AIC-7881U (rev 01)
00:0c.0 VGA compatible controller: Matrox Graphics, Inc. MGA 1064SG
[Mystique] (rev 03).

home[1023]:/proc% cat /proc/pci
PCI devices found:
  Bus  0, device   0, function  0:
    Host bridge: Intel 82439TX (rev 1).
      Medium devsel.  Master Capable.  Latency=32.  
  Bus  0, device   1, function  0:
    ISA bridge: Intel 82371AB PIIX4 ISA (rev 1).
      Medium devsel.  Fast back-to-back capable.  Master Capable.  No
bursts.  
  Bus  0, device   1, function  1:
    IDE interface: Intel 82371AB PIIX4 IDE (rev 1).
      Medium devsel.  Fast back-to-back capable.  Master Capable.
Latency=32.  
      I/O at 0xe000 [0xe001].
  Bus  0, device   1, function  2:
    USB Controller: Intel 82371AB PIIX4 USB (rev 1).
      Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master
Capable.  Latency=32.  
      I/O at 0xd800 [0xd801].
  Bus  0, device   1, function  3:
    Bridge: Intel 82371AB PIIX4 ACPI (rev 1).
      Medium devsel.  Fast back-to-back capable.  
  Bus  0, device   9, function  0:
    Ethernet controller: LiteOn LNE100TX (rev 32).
      Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master
Capable.  Latency=32.  
      I/O at 0xd400 [0xd401].
      Non-prefetchable 32 bit memory at 0xe6000000 [0xe6000000].
  Bus  0, device  11, function  0:
    SCSI storage controller: Adaptec AIC-7881U (rev 1).
      Medium devsel.  Fast back-to-back capable.  IRQ 10.  Master
Capable.  Latency=32.  Min Gnt=8.Max Lat=8.
      I/O at 0xd000 [0xd001].
      Non-prefetchable 32 bit memory at 0xe5800000 [0xe5800000].
  Bus  0, device  12, function  0:
    VGA compatible controller: Matrox Mystique (rev 3).
      Medium devsel.  Fast back-to-back capable.  IRQ 11.  Master
Capable.  Latency=32.  
      Prefetchable 32 bit memory at 0xe7000000 [0xe7000008].
      Non-prefetchable 32 bit memory at 0xe5000000 [0xe5000000].
      Non-prefetchable 32 bit memory at 0xe4800000 [0xe4800000].

home[1003]:/home/orf% cat /proc/interrupts
           CPU0       
  0:     157738          XT-PIC  timer
  1:       6206          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  5:          1          XT-PIC  soundblaster
  9:     443901          XT-PIC  eth0
 10:      11473          XT-PIC  aic7xxx
 12:      20015          XT-PIC  PS/2 Mouse
 13:          1          XT-PIC  fpu
 14:      81018          XT-PIC  ide0
 15:      19345          XT-PIC  ide1
NMI:          0

home[1004]:/home/orf% lsmod
Module                  Size  Used by
sg                     15652   1 (autoclean)
ide-scsi                7316   1
nls_cp437               3872   2 (autoclean)
vfat                    9308   1 (autoclean)
fat                    30208   1 (autoclean) [vfat]
aic7xxx               137060   1 (autoclean)
sd_mod                 18812   1 (autoclean)
scsi_mod               58800   4 (autoclean) [sg ide-scsi aic7xxx sd_mod]
tulip                  31864   1 (autoclean)
awe_wave              158068   0 (unused)
sb                     33748   0
uart401                 6192   0 [sb]
sound                  56600   0 [awe_wave sb uart401]
soundlow                 344   0 [sound]
soundcore               2372   6 [sb sound]


home[1006]:/home/orf% cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 5
model           : 4
model name      : Pentium MMX
stepping        : 3
cpu MHz         : 233.868
fdiv_bug        : no
hlt_bug         : no
sep_bug         : no
f00f_bug        : yes
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr mce cx8 mmx
bogomips        : 466.94

home[1007]:/home/orf% cdrecord -scanbus
Cdrecord 1.9 (i686-pc-linux-gnu) Copyright (C) 1995-2000 Jörg Schilling
Linux sg driver version: 2.1.39
Using libscg version 'schily-0.1'
scsibus0:
        0,0,0     0) 'CWS ORB2' '-SE U ID 0      ' 'D11 ' Removable Disk
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *
scsibus1:
        1,0,0   100) 'TEAC    ' 'CD-524E         ' '3.0C' Removable CD-ROM
        1,1,0   101) 'HP      ' 'CD-Writer+ 8100 ' '1.0g' Removable CD-ROM
        1,2,0   102) *
        1,3,0   103) *
        1,4,0   104) *
        1,5,0   105) *
        1,6,0   106) *
        1,7,0   107) *

home[1033]:/proc/scsi% cat /proc/scsi/scsi
Attached devices: 
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: CWS ORB2 Model: -SE U ID 0       Rev: D11 
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: TEAC     Model: CD-524E          Rev: 3.0C
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 01 Lun: 00
  Vendor: HP       Model: CD-Writer+ 8100  Rev: 1.0g
  Type:   CD-ROM                           ANSI SCSI revision: 02

home[1013]:/proc% cat /proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0220-022f : soundblaster
02f8-02ff : serial(auto)
0330-0333 : MPU-401 UART
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
d000-d0fe : aic7xxx
d400-d4ff : eth0
e000-e007 : ide0
e008-e00f : ide1


home[1016]:/proc% cat /proc/sound
OSS/Free:3.8s2++-971130
Load type: Driver loaded as a module
Kernel: Linux ci225670-a.ashvil1.nc.home.com 2.2.17 #2 Sat Sep 9
15:30:32 EDT 2000 i586
Config options: 0

Installed drivers: 

Card config: 

Audio devices:
0: Sound Blaster 16 (4.16) (DUPLEX)

Synth devices:

Midi devices:
0: Sound Blaster 16

Timers:
0: System clock

Mixers:
0: Sound Blaster
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