[mythtv] Re: Ticket #430: Tuner busy on consecutive recordings

Daniel Kristjansson danielk at cuymedia.net
Sat Oct 8 20:27:08 UTC 2005


On Sat, 2005-10-08 at 12:18 -0700, Mark Kundinger wrote:
> I was also experiencing the tuner busy problem yesterday.  And making
> the eventsleep change suggested did nothing.
> 
> For what it's worth, testing 7416 (which includes the change Daniel
> made in 7410), I was able to tape 5 back-to-back shows on one tuner
> (MPEG) and 3 back-to-back on the other (MJPEG).
> 
> This apparently diverges from JR's experience with 7410, and I cannot
> offer any explanation for that.

There are apparently 3 problems:
 Waiting problem, recently introduced, and fixed in 7410.
 Race problem, old but was made worse by event loop improvements.
 Clock drift problem, which has been around a while.

The clock drift problem is basically this:
 The master backend expects the slave backend to end
 a recording itself. If the slave backend clock drifts 
 out of sync so that it ends recordings after the 
 master backend expects it to, then the master abandons
 the next recording.

I'm working on a fix for all three.

-- Daniel



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