[mythtv-users] Re: Tearing in playback

[William Uther]

On 08/01/2005, at 12:52 AM, Tom Hughes wrote:

> [snip]
> That sounds likely. I'd try checking the other setting with:
>
>   sysctl dev.rtc.max-user-freq

heh:

% sysctl dev.rtc.max-user-freq
dev.rtc.max-user-freq = 64

> If it is less than 1024 then that is probably the problem. You
> can increase it with:
>
>   sysctl -w dev.rtc.max-user-freq=1024
>
> and add it to /etc/sysctl.conf to make it permanent.

2005-01-08 09:55:33 nVidiaVideoSync: Could not open device 
/dev/nvidia0, No such file or directory
2005-01-08 09:55:33 DRMVideoSync: Could not open device /dev/dri/card0, 
No such file or directory
2005-01-08 09:55:33 Using audio as timebase
2005-01-08 09:55:33 Video timing method: RTC

Looks like that was it.  :)

Quick question: how does RTC sync work?

RTC stands for Real Time Clock, right?
I assume that the frequency has to be higher than the total number of 
horizontal lines in your X modeline.  If myth then got a known sync 
signal at any point in the image display it could use that to find the 
blacking period.  Do you know at what point in the frame the sync 
signal is sent and how myth gets it?

Thanks for your help,

Will         :-}

--
Dr William Uther                            National ICT Australia
Phone: +61 2 9385 6357             School of Computer Science and 
Engineering
Email: willu at cse.unsw.edu.au             University of New South Wales
Web: http://www.cse.unsw.edu.au/~willu/        Sydney, Australia