[mythtv-users] Kernel Oops on mythfrontend

James Tyson james at giantrobot.co.nz
Tue Sep 14 01:30:56 EDT 2004


Hi All.

When I select LiveTV on my mythbox I get a kernel oops.

My hardware is a Via C3 on an EPIA MII 10000 motherboard, with 512MB of 
RAM.  Kernel is 2.6.8.1-epia1.  The video capture card in question is a 
bt878 based card.

I'm hoping someone on this list has an idea what's going on, otherwise 
I'm screwed :)

Debug output (generated by tailing the x server and kernel logs 
simultaneously):

2004-09-14 17:23:30 Connecting to backend server: 127.0.0.1:6543 (try 1 
of 5)
2004-09-14 17:23:30 Using protocol version 13
2004-09-14 17:23:30 Using protocol version 13
2004-09-14 17:23:30 Using protocol version 13
2004-09-14 17:23:33 Opening OSS audio device '/dev/dsp'.
2004-09-14 17:23:33 Audio fragment size: 4096
Sep 14 17:23:33 localhost kernel: Warning: CPU frequency out of sync: 
cpufreq and timing core thinks of 931000, is 997000 kHz.
2004-09-14 17:23:33 Using XV port 56
2004-09-14 17:23:36 Changing from None to WatchingLiveTV
GetModeLine - scrn: 0 clock: 31500
GetModeLine - hdsp: 640 hbeg: 656 hend: 720 httl: 840
               vdsp: 480 vbeg: 481 vend: 484 vttl: 500 flags: 10
pthread_setschedparam: Success
Sep 14 17:23:36 localhost kernel: Unable to handle kernel NULL pointer 
dereference at virtual address 00000004
Sep 14 17:23:36 localhost kernel:  printing eip:
Sep 14 17:23:36 localhost kernel: c0115485
Sep 14 17:23:36 localhost kernel: *pde = 00000000
Sep 14 17:23:36 localhost kernel: Oops: 0002 [#1]
Sep 14 17:23:36 localhost kernel: Modules linked in: snd_pcm_oss 
snd_mixer_oss via ds af_packet snd_bt87x tuner tvaudio bttv video_buf 
i2c_algo_bit v4l2_common btcx_risc i2c_core videodev snd_via82xx 
snd_ac97_codec snd_pcm snd_timer snd_page_alloc gameport 
snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore via_ircc irda 
crc_ccitt ehci_hcd joydev usbhid eth1394 uhci_hcd usbcore ohci1394 
ieee1394 yenta_socket pcmcia_core pciehp shpchp pci_hotplug 
cpufreq_userspace longhaul evdev proc_intf freq_table cpufreq_powersave 
psmouse mousedev via_agp agpgart via_rhine mii crc32 rtc unix
Sep 14 17:23:36 localhost kernel: CPU:    0
Sep 14 17:23:36 localhost kernel: EIP:    0060:[add_wait_queue+21/48]   
  Not tainted
Sep 14 17:23:36 localhost kernel: EFLAGS: 00210046   (2.6.8.1-epia1)
Sep 14 17:23:36 localhost kernel: EIP is at add_wait_queue+0x15/0x30
Sep 14 17:23:36 localhost kernel: eax: dec50618   ebx: 00000000   ecx: 
d012defc   edx: d012def0
Sep 14 17:23:36 localhost kernel: esi: 00200246   edi: c01146f0   ebp: 
dec50400   esp: d012deac
Sep 14 17:23:36 localhost kernel: ds: 007b   es: 007b   ss: 0068
Sep 14 17:23:36 localhost kernel: Process mythfrontend (pid: 2736, 
threadinfo=d012c000 task=d2d66eb0)
Sep 14 17:23:36 localhost kernel: Stack: d012c000 fffe04bd dec4315e 
00000000 00000000 00000001 dec50618 00000000
Sep 14 17:23:36 localhost kernel:        d939b26c 00000000 d2d66eb0 
c01146f0 00000000 00000000 d1ba4ce0 d939b26c
Sep 14 17:23:36 localhost kernel:        ffffffed 00000000 d2d66eb0 
c01146f0 00000000 00000000 c01b3dc2 d012df44
Sep 14 17:23:36 localhost kernel: Call Trace:
Sep 14 17:23:36 localhost kernel:  
[__crc_generic_file_aio_write+1479058/3508722] 
viadrv_vblank_wait+0xae/0x170 [via]
Sep 14 17:23:36 localhost kernel:  [default_wake_function+0/32] 
default_wake_function+0x0/0x20
Sep 14 17:23:36 localhost kernel:  [default_wake_function+0/32] 
default_wake_function+0x0/0x20
Sep 14 17:23:36 localhost kernel:  [copy_from_user+66/112] 
copy_from_user+0x42/0x70
Sep 14 17:23:36 localhost kernel:  
[__crc_generic_file_aio_write+1488212/3508722] 
viadrv_wait_vblank+0x1c0/0x1f0 [via]
Sep 14 17:23:36 localhost kernel:  [dentry_open+219/464] 
dentry_open+0xdb/0x1d0
Sep 14 17:23:36 localhost kernel:  [do_coprocessor_error+26/32] 
do_coprocessor_error+0x1a/0x20
Sep 14 17:23:36 localhost kernel:  
[__crc_generic_file_aio_write+1492296/3508722] viadrv_ioctl+0xe4/0x160 
[via]
Sep 14 17:23:36 localhost kernel:  [do_coprocessor_error+26/32] 
do_coprocessor_error+0x1a/0x20
Sep 14 17:23:36 localhost kernel:  [do_coprocessor_error+26/32] 
do_coprocessor_error+0x1a/0x20
Sep 14 17:23:36 localhost kernel:  [sys_ioctl+201/576] 
sys_ioctl+0xc9/0x240
Sep 14 17:23:36 localhost kernel:  [do_coprocessor_error+26/32] 
do_coprocessor_error+0x1a/0x20
Sep 14 17:23:36 localhost kernel:  [syscall_call+7/11] 
syscall_call+0x7/0xb
Sep 14 17:23:36 localhost kernel:  [do_coprocessor_error+26/32] 
do_coprocessor_error+0x1a/0x20
Sep 14 17:23:36 localhost kernel: Code: 89 4b 04 89 5a 0c 89 41 04 89 
08 56 9d 8b 1c 24 8b 74 24 04
2004-09-14 17:23:36 Running as SUID root would allow some threads to 
run with realtime priority, improving video smoothness.
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out
waiting for free video buffers timed out


---
James Tyson
If it's gigantic, it's probably something to do with us.
Giant Robot Ltd, http://www.giantrobot.co.nz/
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