I've had a problem subscribing, so my appologies if you get two copies
of this.
In any event...
I've been following the CVS-alsa on a i686-linux-gnu Sony Viao laptop.
About the time I upgraded my OS to Slackware 9.0 and the kernel to
2.4.22, it stopped working--usually with my machine hanging.
Occasionally it doesn't and today (using today's CVS) I was able to
get kysmoops to give some useful information (appended below).
I'm using a kernel with the lowlatency and preemptive patches (for
2.4.22) applied.
I build alsa using a script, the key parts of which are:
function BuildIn ()
{
echo
echo Building in $1...
echo
cd alsa-$1*
if [ ! -e config.status ]; then
if [ ! -x configure ]; then
./cvscompile $2
else
./configure $2
fi
fi
if [ $? != 0 ]; then
exit 1
fi
make
if [ $? != 0 ]; then
exit 1
fi
cd ..
InstallIn $1
}
BuildIn lib "--with-debug=no --with-gnu-ld"
BuildIn driver "--with-cards=nm256 --with-sequencer=yes"
BuildIn oss "--disable-alsatest --with-gnu-ld"
#BuildIn tools "--disable-alsatest --with-gnu-ld"
BuildIn utils "--disable-alsatest --with-gnu-ld"
and only use the nm256 driver.
Here's what I get:
ksymoops 2.4.1 on i686 2.4.22. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.22/ (default)
-m /usr/src/linux/System.map (default)
Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.
Warning (compare_maps): ksyms_base symbol
IO_APIC_get_PCI_irq_vector_R__ver_IO_APIC_get_PCI_irq_vector not found in System.map.
Ignoring ksyms_base entry
Warning (compare_maps): mismatch on symbol snd_pcm_devices , snd-pcm says cc8cda00,
/lib/modules/2.4.22/kernel/sound/acore/snd-pcm.o says cc8cd5e0. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd-pcm.o entry
Warning (compare_maps): mismatch on symbol snd_pcm_link_rwlock , snd-pcm says
cc8cdb00, /lib/modules/2.4.22/kernel/sound/acore/snd-pcm.o says cc8cd6e0. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd-pcm.o entry
Warning (compare_maps): mismatch on symbol snd_cards , snd says cc8a89e0,
/lib/modules/2.4.22/kernel/sound/acore/snd.o says cc8a8820. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd.o entry
Warning (compare_maps): mismatch on symbol snd_cards_count , snd says cc8a89c0,
/lib/modules/2.4.22/kernel/sound/acore/snd.o says cc8a8800. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd.o entry
Warning (compare_maps): mismatch on symbol snd_ecards_limit , snd says cc8a8964,
/lib/modules/2.4.22/kernel/sound/acore/snd.o says cc8a87a4. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd.o entry
Warning (compare_maps): mismatch on symbol snd_major , snd says cc8a8968,
/lib/modules/2.4.22/kernel/sound/acore/snd.o says cc8a87a8. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd.o entry
Warning (compare_maps): mismatch on symbol snd_mixer_oss_notify_callback , snd says
cc8a8a08, /lib/modules/2.4.22/kernel/sound/acore/snd.o says cc8a8848. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd.o entry
Warning (compare_maps): mismatch on symbol snd_seq_root , snd says cc8a8a14,
/lib/modules/2.4.22/kernel/sound/acore/snd.o says cc8a8854. Ignoring
/lib/modules/2.4.22/kernel/sound/acore/snd.o entry
Warning (compare_maps): mismatch on symbol nlmsvc_ops , lockd says cc88d510,
/lib/modules/2.4.22/kernel/fs/lockd/lockd.o says cc88c7d0. Ignoring
/lib/modules/2.4.22/kernel/fs/lockd/lockd.o entry
Warning (compare_maps): mismatch on symbol nfs_debug , sunrpc says cc880ccc,
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o says cc88098c. Ignoring
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): mismatch on symbol nfsd_debug , sunrpc says cc880cd0,
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o says cc880990. Ignoring
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): mismatch on symbol nlm_debug , sunrpc says cc880cd4,
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o says cc880994. Ignoring
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): mismatch on symbol rpc_debug , sunrpc says cc880cc8,
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o says cc880988. Ignoring
/lib/modules/2.4.22/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): ip_conntrack symbol GPLONLY_ip_conntrack_expect_find_get not
found in /lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o. Ignoring
/lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o entry
Warning (compare_maps): ip_conntrack symbol GPLONLY_ip_conntrack_expect_put not found
in /lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o. Ignoring
/lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o entry
Warning (compare_maps): ip_conntrack symbol GPLONLY_ip_conntrack_find_get not found in
/lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o. Ignoring
/lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o entry
Warning (compare_maps): ip_conntrack symbol GPLONLY_ip_conntrack_put not found in
/lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o. Ignoring
/lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o entry
Warning (compare_maps): mismatch on symbol ip_conntrack_hash , ip_conntrack says
cc8618d4, /lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o says cc8613a0.
Ignoring /lib/modules/2.4.22/kernel/net/ipv4/netfilter/ip_conntrack.o entry
Warning (compare_maps): mismatch on symbol usb_devfs_handle , usbcore says cc8490f4,
/lib/modules/2.4.22/kernel/drivers/usb/usbcore.o says cc848b74. Ignoring
/lib/modules/2.4.22/kernel/drivers/usb/usbcore.o entry
Unable to handle kernel NULL pointer dereference at virtual address 00000000
c0113b58
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0113b58>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010086
eax: c826d984 ebx: c5fb4000 ecx: 00000000 edx: 00000003
esi: c826d984 edi: c8205f20 ebp: c5fb5f20 esp: c5fb5f00
ds: 0018 es: 0018 ss: 0018
Process aplay (pid: 8535, stackpage=c5fb5000)
Stack: c30a8a00 c826d800 c8205f20 c826d988 cc8a87c0 00000001 00000286 00000003
c826d94c cc8a27ea c8205f20 00000000 00000282 c826d95c c826d95c c1cab520
c826d800 cc8a40dd c826d800 c8205f20 00000000 c1cab540 c826d95c c8205f20
Call Trace: [<cc8a87c0>] [<cc8a27ea>] [<cc8a40dd>] [<c0136bc4>] [<c0135827>]
[<c013588b>] [<c0106d9b>]
Code: 8b 01 85 45 fc 74 6a c7 45 f0 00 00 00 00 9c 5f fa ff 43 04
>>EIP; c0113b58 <__wake_up+48/ec> <=====
Trace; cc8a87c0 <[snd]snd_fops+0/44>
Trace; cc8a27ea <[snd]snd_card_file_remove+aa/d0>
Trace; cc8a40dd <[snd]snd_ctl_release+11d/140>
Trace; c0136bc4 <fput+4c/f8>
Trace; c0135827 <filp_close+93/a0>
Trace; c013588b <sys_close+57/7c>
Trace; c0106d9b <system_call+33/38>
Code; c0113b58 <__wake_up+48/ec>
00000000 <_EIP>:
Code; c0113b58 <__wake_up+48/ec> <=====
0: 8b 01 mov (%ecx),%eax <=====
Code; c0113b5a <__wake_up+4a/ec>
2: 85 45 fc test %eax,0xfffffffc(%ebp)
Code; c0113b5d <__wake_up+4d/ec>
5: 74 6a je 71 <_EIP+0x71>
Code; c0113b5f <__wake_up+4f/ec>
7: c7 45 f0 00 00 00 00 movl $0x0,0xfffffff0(%ebp)
Code; c0113b66 <__wake_up+56/ec>
e: 9c pushf
Code; c0113b67 <__wake_up+57/ec>
f: 5f pop %edi
Code; c0113b68 <__wake_up+58/ec>
10: fa cli
Code; c0113b69 <__wake_up+59/ec>
11: ff 43 04 incl 0x4(%ebx)
21 warnings issued. Results may not be reliable.
David
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