[mythtv-users] 0.24+fixes - tearing, /dev/rtc permissions and getting openGL to work

[Mike]

On 26 February 2011 13:34, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 02/26/2011 01:25 PM, Mike wrote:
>> On 26 February 2011 13:12, Michael T. Dean wrote:
>>> On 02/26/2011 11:01 AM, Mike wrote:
>>>> On 26 February 2011 10:50, Brian J. Murrell wrote:
>>>>> On 11-02-26 10:47 AM, Mike wrote:
>>>>>> Thanks for everyones help and commentary on what my hardware can
>>>>>> achieve.
>>>>> I just wish I could get mine to stop tearing as easily as you did.
>>> ...
>>>> I've also tried to ensure I'm running 'good' NVIDIA drivers
>>> And, TTBOMK, that is basically the approach you need to take to prevent
>>> tearing.  AFAIU, tearing has nothing to do with /dev/rtc timing versus
>>> usleep timing.  The video drivers prevent tearing, so you need good
>>> drivers and need to configure them correctly for your chosen video
>>> output method.
>> I realised tearing is not related to the timing sources in my
>> situation with GPU/Composite issue... I had understood from a mythtv
>> wiki page that OpenGL (obselete) was better than RTC which was
>> possibly better than usleep... overall, I figured since RTC
>> configureable it may be useful or better than usleep for general
>> timing issues wrt audio&  video and streaming from a separate backend
>> vs frontend.  All speculation though and was just pinning my hopes on
>> what I'd read and trying to figure out how to achieve RTC timing
>> instead of usleep.  Maybe usleep is less important in the newer
>> versions of hardware&  software?
>
>  From what I understand, the timing is more about frame delivery than
> tearing.  A good-quality timer makes it more likely for us to have the
> frame ready when it's needed (presuming decoding/rendering hardware are
> able to keep up), so you don't end up dropping frames or whatever.
>
> Mike
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Anyone know how/why I can't control the volume in MythTV given it is
now using NVIDIA HDMI sound source?  I rescanned to find this source
when I upgraded from 0.23 to 0.24 but I'd not tried adjusting the HDMI
audio volume in either version until today.