[mythtv-users] correctly setting permission for /dev/video* ubuntu 12.04+myth

[Allan Strand]

duh.  found the module compilation instructions on the myth wiki page for
hdpvr
cheers,
a.

On Thu, Jun 14, 2012 at 10:06 AM, Allan Strand <stranda at gmail.com> wrote:

> Will try the sleep.
>
> Any more specifics on the fix you mention?    I have not updated the
> firmware.  I'm a little wary of that given this thread:
>
> http://www.mythtv.org/pipermail/mythtv-users/2012-March/330825.html
>
> I'm running a 3.2 kernel and am unclear how to update the driver. Or even
> where to go to find its source code.
>
> thanks, Allan
>
> On Thu, Jun 14, 2012 at 9:53 AM, Michael T. Dean <mtdean at thirdcontact.com>wrote:
>
>> On 06/14/2012 09:08 AM, Allan Strand wrote:
>>
>>> Hi All,
>>>
>>> Ubuntu 12.04 and MythTV 0.25.1
>>>
>>> I have a hdpvr that works fine with the exception of color balance.  As
>>> documented multiple places, the device can be controlled with 'v4l2-ctl'
>>> and this issue can be fixed.
>>>
>>> So I have a bash script to change the settings using this approach
>>> that's called by my channel change script.
>>>
>>> Unfortunately, the script does not seem to run when channel changing,
>>> though it does when I run from command line.
>>>
>>> I suspect this is a permission problem, so I added mythtv (the user that
>>> runs the backend) to the video group on this machine and verified that
>>> group permissions on /dev/video1 (pvr-150 on video0) allow both reading and
>>> writing.
>>>
>>> Still there seems to be no change to the device.  Also, I'm not sure
>>> where to find stderr output from the channel change script.  It does not
>>> seem to appear in the mythbackend log.
>>>
>>> Any pointers to solutions to what must be a common problem?
>>>
>>
>> Perhaps you're running it too early--before MythTV sets it device
>> settings?  Try putting a sleep in the channel change script before the
>> color-fix script is run.
>>
>> Also, I think there's a fix for the "wrong colors with new HD-PVR
>> firmware versions" available (in new kernels or something?).  Might want to
>> just fix the issue, instead of working around it.
>>
>> Mike
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>>
>
>
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