Diff for "Install_IVTV_Troubleshooting"

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=== Check IVTV is initialized ===

Run:
 {{{
dmesg |grep Initialized
}}}

You should see something like:
 {{{
ivtv: Initialized WinTV PVR 250, card #0
ivtv: Initialized WinTV PVR 350, card #1
}}}
This example shows two cards. If you only have one, you will see results similar to this:
 {{{
ivtv: Initialized WinTV PVR 250, card #0
}}}

This is a good way to identify if the card even initially loaded.
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=== Poor Audio Quality on a PVR-500 ===
If you are encountering distorted audio, this is a known issue with certain versions of the ivtv driver (and is apparent in the windows driver too). Follow the directions below on this page to upgrade to a newer version. Thanks to jlr4u for verifying that this solved the problem.
If you encounter issues still, post in this thread: http://ubuntuforums.org/showthread.php?t=345655
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dmesg dmesg | tac | sed -n '/=\ \ END INIT IVTV\ \ =/,/= START INIT IVTV =/p;/= START INIT IVTV =/q' | tac
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Look in between the two blocks for START IVTV and END IVTV. If you see any errors about "unable to load firmware" or "missing module" or anything like that, go into #ubuntu and see if you can grab some help or post on the forums. If you see any errors that are not covered below, go into #ubuntu and see if you can grab some help or post on the forums.

=== Errors during modprobe ===
If you encounter errors similar to:
 {{{
sudo modprobe ivtv
FATAL: Error inserting ivtv (/lib/modules/2.6.17-10-generic/ivtv/ivtv.ko): Unknown symbol in module, or unknown parameter (see dmesg)
}}}
and check {{{dmesg}}} to see similar things to this:
 {{{
[17182375.312000] ivtv: disagrees about version of symbol video_unregister_device
[17182375.312000] ivtv: Unknown symbol video_unregister_device
[17182375.312000] ivtv: disagrees about version of symbol video_device_alloc
[17182375.312000] ivtv: Unknown symbol video_device_alloc
[17182375.312000] ivtv: disagrees about version of symbol video_register_device
[17182375.312000] ivtv: Unknown symbol video_register_device
[17182375.312000] ivtv: disagrees about version of symbol video_device_release
[17182375.312000] ivtv: Unknown symbol video_device_release
[17182762.044000] ivtv: disagrees about version of symbol video_unregister_device
[17182762.044000] ivtv: Unknown symbol video_unregister_device
[17182762.044000] ivtv: disagrees about version of symbol video_device_alloc
[17182762.044000] ivtv: Unknown symbol video_device_alloc
[17182762.044000] ivtv: disagrees about version of symbol video_register_device
[17182762.044000] ivtv: Unknown symbol video_register_device
[17182762.044000] ivtv: disagrees about version of symbol video_device_release
[17182762.044000] ivtv: Unknown symbol video_device_release
}}}
you will need to reinstall the running linux image. This can be caused by overwriting the modules necessary for ivtv to work.

Reinstall the linux image:
 {{{
sudo apt-get install --reinstall linux-image-`uname -r`
sudo depmod -a
}}}

Follow the steps to rebuild the modules.
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First make a copy of your old grub configuration. You should do this everytime you make an edit of grub.
{{{
cp /boot/grub/menu.list /boot/grub/menu.list.backup
}}}
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=== Check IVTV is initialized ===
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Run:

{{{dmesg |grep Initialized}}}
You should see something like:
{{{ivtv: Initialized WinTV PVR 250, card #0
ivtv: Initialized WinTV PVR 350, card #1}}}
(Here I'm showing an example with two cards. If you only have one....
{{{ivtv: Initialized WinTV PVR 250, card #0 }}}

doesn't help diagnose but is a yes/no answer to if it's starting on boot.		 <<Include(Install_IVTV_Troubleshooting/PreFeisty)>>

Troubleshooting

Check IVTV is initialized

Run: 

  • dmesg |grep Initialized

You should see something like: 

  • ivtv: Initialized WinTV PVR 250, card #0
ivtv: Initialized WinTV PVR 350, card #1

This example shows two cards. If you only have one, you will see results similar to this: 

  • ivtv: Initialized WinTV PVR 250, card #0

This is a good way to identify if the card even initially loaded.

Testing Capture

  • After the driver is loaded, you can test it by doing a simple capture 
    • cat /dev/video0 > /tmp/test_capture.mpg

    Let this go for about 5 sec and then press <ctrl> + 'c'

  • Attempt to play this back using your favorite media player. (mplayer for the example) 
    • mplayer /tmp/test_capture.mpg
  • See if you have some recorded content coming up in the test capture.

Poor Audio Quality on a PVR-500

If you are encountering distorted audio, this is a known issue with certain versions of the ivtv driver (and is apparent in the windows driver too). Follow the directions below on this page to upgrade to a newer version. Thanks to jlr4u for verifying that this solved the problem. If you encounter issues still, post in this thread: http://ubuntuforums.org/showthread.php?t=345655

Diagnosing Problems

  • Check dmesg to see if there are any errors loading firmware or anything like that. 
    dmesg | tac | sed -n '/=\ \ END INIT IVTV\ \ =/,/= START INIT IVTV =/p;/= START INIT IVTV =/q' | tac

If you see any errors that are not covered below, go into #ubuntu and see if you can grab some help or post on the forums.

Errors during modprobe

If you encounter errors similar to: 

  • sudo modprobe ivtv
FATAL: Error inserting ivtv (/lib/modules/2.6.17-10-generic/ivtv/ivtv.ko): Unknown symbol in module, or unknown parameter (see dmesg)

and check dmesg to see similar things to this: 

  • [17182375.312000] ivtv: disagrees about version of symbol video_unregister_device
[17182375.312000] ivtv: Unknown symbol video_unregister_device
[17182375.312000] ivtv: disagrees about version of symbol video_device_alloc
[17182375.312000] ivtv: Unknown symbol video_device_alloc
[17182375.312000] ivtv: disagrees about version of symbol video_register_device
[17182375.312000] ivtv: Unknown symbol video_register_device
[17182375.312000] ivtv: disagrees about version of symbol video_device_release
[17182375.312000] ivtv: Unknown symbol video_device_release
[17182762.044000] ivtv: disagrees about version of symbol video_unregister_device
[17182762.044000] ivtv: Unknown symbol video_unregister_device
[17182762.044000] ivtv: disagrees about version of symbol video_device_alloc
[17182762.044000] ivtv: Unknown symbol video_device_alloc
[17182762.044000] ivtv: disagrees about version of symbol video_register_device
[17182762.044000] ivtv: Unknown symbol video_register_device
[17182762.044000] ivtv: disagrees about version of symbol video_device_release
[17182762.044000] ivtv: Unknown symbol video_device_release

you will need to reinstall the running linux image. This can be caused by overwriting the modules necessary for ivtv to work.

Reinstall the linux image: 

  • sudo apt-get install --reinstall linux-image-`uname -r`
sudo depmod -a

Follow the steps to rebuild the modules.

Resource allocation errors

There are two possible solutions to resource allocation problems:

  • Be sure that you have enabled APIC on your machine's BIOS. This will guarantee enough resources are allocated for the device.

    See http://ubuntuforums.org/showthread.php?t=284041 for more information.

  • Add  vmalloc=192m  to your kernel boot parameters.

First make a copy of your old grub configuration. You should do this everytime you make an edit of grub. 

cp /boot/grub/menu.list /boot/grub/menu.list.backup

  • Edit /boot/grub/menu.lst to add the vmalloc=192 to the end of your kernel line: 

    • title           Ubuntu, kernel 2.6.17-10-server
root            (hd0,0)
kernel          /boot/vmlinuz-2.6.17-10-server root=/dev/hda1 ro quiet splash vmalloc=192m
initrd          /boot/initrd.img-2.6.17-10-server
quiet
savedefault
boot

Install_IVTV_Troubleshooting (last edited 2008-06-27 10:15:00 by localhost)