Re: [BUG] Sound related problem with Linux-2.6.31-rc8-git1-rt9

From: Takashi Iwai
Date: Sat Sep 05 2009 - 04:44:46 EST


At Fri, 4 Sep 2009 14:45:28 +0300,
Tarkan Erimer wrote:
>
>
> When I ran a movie, I got these errors in dmesg. Also, sound began to skip too
> fastly. My audio device is:
>
> tarkane@tarkane:~$ lspci | grep -i audio
> 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition
> Audio Controller (rev 01)
>
>
> Tarkan Erimer
>
>
> [81001.954666] BUG: unable to handle kernel NULL pointer dereference at
> 00000000000000a8
> [81001.954677] IP: [<ffffffffa010f4b5>] snd_pcm_period_elapsed+0x11/0x1ec
> [snd_pcm]
> [81001.954701] PGD 1a028067 PUD 1a022067 PMD 0
> [81001.954708] Oops: 0000 [#1] PREEMPT SMP
> [81001.954713] last sysfs file:
> /sys/devices/pci0000:00/0000:00:1d.7/usb5/5-8/5-8:1.0/host5/target5:0:0/5:0:0:0/block/sdb/size
> [81001.954718] CPU 1
> [81001.954721] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat usb_storage
> nfs lockd fscache nfs_acl auth_rpcgss sunrpc xt_multiport iptable_filter
> ip_tables x_tables binfmt_misc bridge stp llc bnep xfrm_user xfrm4_tunnel
> tunnel4 ipcomp xfrm_ipcomp esp4 ah4 deflate ctr twofish twofish_common
> camellia serpent blowfish cast5 des_generic cbc aes_x86_64 aes_generic xcbc
> rmd160 sha256_generic sha1_generic crypto_null af_key xfs exportfs btrfs
> zlib_deflate crc32c libcrc32c snd_hda_codec_realtek snd_hda_intel
> snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss
> snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer iTCO_wdt
> snd_seq_device iTCO_vendor_support snd soundcore snd_page_alloc psmouse
> serio_raw pcspkr usbhid ehci_hcd uhci_hcd tg3 floppy
> [81001.954806] Pid: 2180, comm: hd-audio0 Not tainted 2.6.31-rc8-git1 #4 HP
> Compaq dc7600 Small Form Factor
> [81001.954810] RIP: 0010:[<ffffffffa010f4b5>] [<ffffffffa010f4b5>]
> snd_pcm_period_elapsed+0x11/0x1ec [snd_pcm]
> [81001.954827] RSP: 0018:ffff88003a0cddd0 EFLAGS: 00010282
> [81001.954831] RAX: 0000000000000000 RBX: ffff88003a1cf9e0 RCX:
> 0000000000000000
> [81001.954834] RDX: 0000000000000001 RSI: 0000000000000003 RDI:
> 0000000000000000
> [81001.954837] RBP: 0000000000000004 R08: ffff88003a1cf9e0 R09:
> 00000000ffffffff
> [81001.954841] R10: 0000000000000013 R11: ffffffff81033a48 R12:
> ffff88003a49cc48
> [81001.954844] R13: 0000000000000000 R14: ffff88003a49cc00 R15:
> ffffffffa014c092
> [81001.954849] FS: 0000000000000000(0000) GS:ffff8800017f8000(0000)
> knlGS:0000000000000000
> [81001.954853] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> [81001.954856] CR2: 00000000000000a8 CR3: 000000001a01b000 CR4:
> 00000000000006a0
> [81001.954860] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [81001.954863] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [81001.954868] Process hd-audio0 (pid: 2180, threadinfo ffff88003a0cc000, task
> ffff88003f197750)
> [81001.954870] Stack:
> [81001.954872] 0000000000000000 ffff88003a1cf9e0 0000000000000004
> ffff88003a49cc48
> [81001.954878] <0> 0000000000000000 ffff88003a49cc00 ffffffffa014c092
> ffffffffa014c11c
> [81001.954884] <0> ffff88003a0cdec8 ffffc9000260c100 ffff88003a49cdf0
> ffff88003a49cdf8
> [81001.954892] Call Trace:
> [81001.954905] [<ffffffffa014c092>] ? azx_irq_pending_work+0x0/0xbc
> [snd_hda_intel]
> [81001.954914] [<ffffffffa014c11c>] ? azx_irq_pending_work+0x8a/0xbc
> [snd_hda_intel]
> [81001.954923] [<ffffffff81051f35>] ? worker_thread+0x1cb/0x268
> [81001.954928] [<ffffffff81056355>] ? autoremove_wake_function+0x0/0x2e
> [81001.954933] [<ffffffff81051d6a>] ? worker_thread+0x0/0x268
> [81001.954938] [<ffffffff81055f9c>] ? kthread+0x8b/0x93
> [81001.954944] [<ffffffff81011c5a>] ? child_rip+0xa/0x20
> [81001.954949] [<ffffffff81055f11>] ? kthread+0x0/0x93
> [81001.954953] [<ffffffff81011c50>] ? child_rip+0x0/0x20
> [81001.954955] Code: 01 00 00 31 c9 ba 01 00 00 00 be 06 00 00 00 e8 5d 7c f2
> e0 31 c9 89 c8 5f c3 41 57 41 56 41 55 41 54 55 53 48 83 ec 08 49 89 fd <4c>
> 8b bf a8 00 00 00 49 8b 87 b0 02 00 00 48 85 c0 74 02 ff d0
> [81001.955011] RIP [<ffffffffa010f4b5>] snd_pcm_period_elapsed+0x11/0x1ec
> [snd_pcm]
> [81001.955026] RSP <ffff88003a0cddd0>
> [81001.955029] CR2: 00000000000000a8
> [81001.955033] ---[ end trace 552f354de445b720 ]---

It's the first case of such a report. Might be some races.
Did you set CONFIG_SND_DEBUG=y?


thanks,

Takashi
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