[mythtv-users] HDPVR cat video0 input output error. Everything seems in place

Mark markhsa at gmail.com
Wed Oct 31 13:43:41 UTC 2012


On 10/31/2012 05:06 AM, Rick wrote:
>>>>
>>>> New Mythbox on F17
>>>> I know the HDPVR works as its fine on another F17 ( old ) box.
>>>>
>>>> Problem: cat /dev/video0 > /tmp/vid.avi
>>>>
>>>> Info:
>>>> ls -al /dev/video0
>>>> crw-rw----+ 1 root video 81, 0 Oct 30 15:19 /dev/video0
>>> Well, it's a guess but that + on the end of the attributes means it
>>> has an ACL (Access Control List) associated with it - it's an
>>> extension to the standard Linux permissions. Doing
>>>
>>> getfacl /dev/video0 will show you the true permissions.
>>>
>>> To determine whether it's an ACL problem you can remove the ACL with
>>> setfacl -b.
>>>
>>> Mark
>>>
>>>> lsmod |grep hdpvr
>>>> hdpvr                  32337  0
>>>> v4l2_common            15099  1 hdpvr
>>>> videodev              119976  2 hdpvr,v4l2_common
>>>> i2c_core               38314  5
>>>> i2c_i801,hdpvr,nvidia,v4l2_common,videodev
>>>>
>>>> hdpvr 2-1.6:1.0: firmware version 0x12 dated May  7 2009 23:27:43
>>>> [80987.350493] hdpvr 2-1.6:1.0: device now attached to video0
>>>> [80987.350519] usbcore: registered new interface driver hdpvr
>>>>
>>>> So it all looks good.  I cant cat the video device as root or anyone
>>>> in the video group.
>>>>
>>>> Any ideas on what else I can check?
>>>>
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>> I thought this could be firmware related, so I upgrade the HDPVR to the
>> latest from Haupaugge.
>>
>> Still doing the same thing.  Also, went one Kernel back, same.
>> [root at beast ~]# cat /dev/video0 > /tmp/outvid
>> cat: /dev/video0: Input/output error
>>
>> Ideas?
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>>
>
>
> Audio cable connected correctly and tightly?  Seems to me if it is not 
> you don't record.
>
> rick
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> mythtv-users at mythtv.org
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Yes, verified that all cables are connected and in properly.


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