ac3 pass-thru occasionally causing a kernel panic?

[MRKisThatKid]

I've recently started to get a kernel panic every few days, and the only thing consistent with each one is that I have been playing an x264 in vlc with the ac3 pass-thru to my z-5500.

Also, the kernel panic log says the panic was caused by the audio IO. Is there a chance that this is a bug in VLC?

Here's the panic log...

Wed Nov 12 23:05:28 2008
panic(cpu 0 caller 0x001A8CEC): Kernel trap at 0x00198016, type 14=page fault, registers:
CR0: 0x80010033, CR2: 0x2e639000, CR3: 0x01060000, CR4: 0x000026e0
EAX: 0x45a0764c, EBX: 0x04676800, ECX: 0x00000194, EDX: 0x00002640
CR2: 0x2e639000, EBP: 0x34607cd8, ESI: 0x2e639000, EDI: 0x45a0963c
EFL: 0x00010206, EIP: 0x00198016, CS: 0x00000008, DS: 0x00190010
Error code: 0x00000000

Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x34607ae8 : 0x12b0fa (0x459234 0x34607b1c 0x133243 0x0)
0x34607b38 : 0x1a8cec (0x4627a0 0x198016 0xe 0x461f50)
0x34607c18 : 0x19eed5 (0x34607c2c 0x34607cd8 0x198016 0xe)
0x34607c24 : 0x198016 (0xe 0x2e600048 0x10 0x34600010)
0x34607cd8 : 0xb0282a (0x4676800 0x2e637010 0x459f3000 0x5193)
0x34607d28 : 0xb0266e (0x4748500 0x5193 0x990 0x17514b)
0x34607d68 : 0xb0246d (0x4748500 0x6912898 0x34607e98 0x16a243)
0x34607de8 : 0xafdafc (0x4748500 0x4d31988 0x5523 0x170)
0x34607e68 : 0xafd196 (0x48d1800 0x5523 0x170 0x9173f00)
0x34607ea8 : 0x43d4bc (0x48d1800 0x5523 0x170 0x0)
0x34607f08 : 0x1974c2 (0x34607f44 0x0 0x0 0x0)
0x34607fc8 : 0x19f4a3 (0xb574cf8 0x1 0x1a20b5 0x4827ba0)
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb09ccb58
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.IOAudioFamily(1.6.4b7)@0xaf3000->0xb09fff
dependency: com.apple.kext.OSvKernDSPLib(1.1)@0xaf0000

BSD process name corresponding to current thread: VLC

Mac OS version:
9F33

Kernel version:
Darwin Kernel Version 9.5.0: Wed Sep 3 11:29:43 PDT 2008; root:xnu-1228.7.58~1/RELEASE_I386
System model name: iMac4,1 (Mac-F42787C8)

[DallasDeckard]

This has been happening to me as well. My Mac has completely crashed under a kernel panic 5 times and only 5 times and each time it was caused by the DTS passthrough from VLC. It occurs playing an .mkv Hi-Def x264 file with DTS encoded audio.

I have tried playing the same files in Mplayer and Plex and it happens with neither of those programs. It only happens in VLC.

It is a bug in VLC or some bug in the Apple module dealing with VLC.

This is the last line in Console before the crash:

11/19/08 11:42:29 PM [0x0-0x238238].org.videolan.vlc[3780] [00000434] a52 decoder: A/52 channels:6 samplerate:48000 bitrate:640000

Then... boom. The next time it happens I will save the crash report that is sent to Apple and post it here.