[mythtv-users] Backend Upstart howto

[Jan Ceuleers]

On 24/04/11 22:51, R. G. Newbury wrote:
> A tip published here was to delay starting the mythbackend service. Set
> it NOT to start in the usual way (chkconfig mythbackend off), but start
> it by a line near the bottom of /etc/rc.d/rc.local (service mythbackend
> start). The effect is the same but this makes it one of the last steps
> before the x-server starts and ensures that the network and any tuners
> which rely on modprobe, have stabilized. And you can even add a wait
> time with a 'sleep 10' if necessary.
>
> So does upstart have a similar last step script?

Yes, that's what I did until I did what I described earlier. With a long 
timeout (with sleep), because in the worst case the last of my tuners 
isn't ready until 70 seconds after power-on. You can make this as robust 
as you like by picking a long-enough timeout. Note that the amount of 
time you need to wait might depend on whether you're cold-booting or 
warm-booting, as in the latter case the tuners might not need their 
firmware reloaded. And if for some reason a tuner does not come online 
the backend will be started anyway. So some people might prefer this 
method, but to me the backend does not have any purpose without its 
tuners, so I prefer it not to start in case of tuner failure.

I had also tried starting on "started udev-finish" (which was another 
tip floating around) but that is also not a proper fix, because although 
udev might know that it has finished working through the boot-time 
backlog it cannot know whether any events are yet to fire as a result of 
actions it has initiated (such as firmware loads).

Cheers, Jan