From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: Oops on resume, X crashes
Date: Mon, 20 Oct 2003 16:48:54 +0200
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To: Gou Zhuang <gouzhuang@bigfoot.com>
Cc: alsa-devel@lists.sourceforge.net
List-Id: alsa-devel@alsa-project.org

At Mon, 20 Oct 2003 15:48:55 +0800,
Gou Zhuang wrote:
> 
> I'm running kernel 2.4.22 and alsa-0.9.7c on a Dell laptop. I have problem on
> suspend/resume when alsa modules loaded. I have done a few testings, below is my findings:
> 
> If the snd-pcm-oss module is in use(by arts sound server) at the time of suspend, kernel
> oops upon resuming and X server crashes. It has no problem when snd-pcm-oss is not in use(
> released by arts). 0.9.6 has the same behavior. My sound card is on-board intel8x0.
> 
> I searched the mail archive and didn't find any similar cases. Could anybody look into
> this problem?

i don't see any obvious bugs in the resume code, and i thought it
worked fine once on my test machine.
could you check at which funciton the oops occurs, e.g. simply by
puttig debug printk at each entry point?  according to ksymoops, it's
in snd_intel8x0_resume() (i.e. intel8x0_resume()).  this could be
either in snd_intel8x0_chip_init() or snd_ac97_resume().
in the latter function, there is no sleep or no wakeup, so it's likely
in the former one.


Takashi

> 
> Below is the decoded oops(on kernel 2.4.22 with alsa-0.9.7c loaded):
> --------------------------------------------------------------
> ksymoops 2.4.9 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 /boot/System.map-2.4.22 (specified)
> 
> Unable to handle kernel paging request at virtual address fffffffc
> c0116d70
> *pde = 00001063
> Oops: 0000
> CPU:    0
> EIP:    0010:[<c0116d70>]    Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010007
> eax: 00000000   ebx: 00000000   ecx: 00000000   edx: 00000000
> esi: d7ec2fb0   edi: 00000003   ebp: d5307ee4   esp: d5307ec8
> ds: 0018   es: 0018   ss: 0018
> Process X (pid: 851, stackpage=d5307000)
> Stack: 00000000 00000000 00000001 00000282 d7fc7808 d7fc9eb4 d7fc9ea0 00000000
>        d8bee512 d754a000 c021dc06 d7fc7800 c021dd3b d7fc7800 d7fc9ea0 00000003
>        00000000 c021de83 d7fc9ea0 c142d2a0 c021dee5 c142d420 c0127e52 c142d2a0
> Call Trace:    [<d8bee512>] [<c021dc06>] [<c021dd3b>] [<c021de83>] [<c021dee5>]
>   [<c0127e52>] [<c0127f54>] [<c0113a43>] [<c011415c>] [<c0149b39>] [<c010740f>]
> Code: 8b 4b fc 8b 01 85 c7 75 19 8b 02 89 d3 89 c2 0f 18 00 39 f3
> 
> 
> >>EIP; c0116d70 <__wake_up+30/80>   <=====
> 
> >>esi; d7ec2fb0 <_end+17b53f8c/1880603c>
> >>ebp; d5307ee4 <_end+14f98ec0/1880603c>
> >>esp; d5307ec8 <_end+14f98ea4/1880603c>
> 
> Trace; d8bee512 <[snd-intel8x0]snd_intel8x0_resume+12/20>
> Trace; c021dc06 <pci_pm_resume_device+26/30>
> Trace; c021dd3b <pci_pm_resume_bus+2b/70>
> Trace; c021de83 <pci_pm_resume+33/50>
> Trace; c021dee5 <pci_pm_callback+45/50>
> Trace; c0127e52 <pm_send+72/a0>
> Trace; c0127f54 <pm_send_all+74/b0>
> Trace; c0113a43 <suspend+e3/120>
> Trace; c011415c <do_ioctl+10c/180>
> Trace; c0149b39 <sys_ioctl+c9/250>
> Trace; c010740f <system_call+33/38>
> 
> Code;  c0116d70 <__wake_up+30/80>
> 00000000 <_EIP>:
> Code;  c0116d70 <__wake_up+30/80>   <=====
>    0:   8b 4b fc                  mov    0xfffffffc(%ebx),%ecx   <=====
> Code;  c0116d73 <__wake_up+33/80>
>    3:   8b 01                     mov    (%ecx),%eax
> Code;  c0116d75 <__wake_up+35/80>
>    5:   85 c7                     test   %eax,%edi
> Code;  c0116d77 <__wake_up+37/80>
>    7:   75 19                     jne    22 <_EIP+0x22>
> Code;  c0116d79 <__wake_up+39/80>
>    9:   8b 02                     mov    (%edx),%eax
> Code;  c0116d7b <__wake_up+3b/80>
>    b:   89 d3                     mov    %edx,%ebx
> Code;  c0116d7d <__wake_up+3d/80>
>    d:   89 c2                     mov    %eax,%edx
> Code;  c0116d7f <__wake_up+3f/80>
>    f:   0f 18 00                  prefetchnta (%eax)
> Code;  c0116d82 <__wake_up+42/80>
>   12:   39 f3                     cmp    %esi,%ebx
> 
> --------------------------------------------------------------
> 
> This is the list of modules:
> Module                  Size  Used by    Not tainted
> snd-pcm-oss            39364   1
> snd-mixer-oss          13720   1 [snd-pcm-oss]
> keybdev                 2112   0 (unused)
> mousedev                4404   1
> hid                    15624   0 (unused)
> input                   3328   0 [keybdev mousedev hid]
> uhci                   25968   0 (unused)
> usbcore                62624   1 [hid uhci]
> snd-intel8x0           19460   2
> snd-pcm                61536   0 [snd-pcm-oss snd-intel8x0]
> snd-timer              14628   0 [snd-pcm]
> snd-ac97-codec         42456   0 [snd-intel8x0]
> snd-page-alloc          6484   0 [snd-intel8x0 snd-pcm]
> snd-mpu401-uart         3456   0 [snd-intel8x0]
> snd-rawmidi            13536   0 [snd-mpu401-uart]
> snd-seq-device          4288   0 [snd-rawmidi]
> snd                    29956   0 [snd-pcm-oss snd-mixer-oss snd-intel8x0 snd-pcm snd-timer
> snd-ac97-codec snd-mpu401-uart snd-rawmidi snd-seq-device]
> soundcore               3588   4 [snd]
> 3c59x                  27984   1
> yenta_socket           10816   0
> pcmcia_core            43104   0 [yenta_socket]
> nls_cp936             119964   1 (autoclean)
> nls_gb2312               448   1 (autoclean)
> 
> 
> 
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