[mythtv-users] Playback stoppyand go-y. Ie super-duper-uber-jittery.

[Isaac Richards]

On Tuesday 28 March 2006 13:03, Greg Stark wrote:
> Greg Stark <gsstark at MIT.EDU> writes:
> > So my question is, what does mythfrontend use to handle vsync if it's
> > _not_ using opengl vsync? Reading the code it seems to base it on some
> > calculated refresh rate, but where does it get that refresh rate?
>
> Ok, it seems it uses XF86VidModeGetModeLine to calculate a refresh rate.
> And the ATI driver appears to be giving a bogus value that makes mythtv
> think the refresh rate is 434Khz. I could see how that would confuse
> mythtv.
>
> I submitted an xorg bug report:
> https://bugs.freedesktop.org/show_bug.cgi?id=6421
>
> But it seems like mythtv can easily protect itself here. It already
> defaults to 60hz if it can't get any refresh rate from X. I would say it
> should also fail over to the default if the refresh rate it gets from X is
> unreasonable.
>
> Something like this (untested):

Looks reasonable - file a bug in trac ( http://svn.mythtv.org ) and someone 
will apply it.

Isaac