[mythtv-users] DVB-S locking problem

[Mark Carbonaro]

Hi,

I have a strange issue that started happening in the last month and
was wondering if anyone has some advice on how I can track down and
resolve the issue.

I use a DVB-S (Tevii S660) which was working fine, but all of a sudden
it stopped getting a lock (Tl___).  I thought I may have blown the
tuner or something like that so I grabbed a PCI DVB-S tuner that I
had, but the same problem.  I connected my providers decoder back in
and it works fine (so the dish, cabling, LNB and smart card seem to be
fine).

Thinking it may have been my Gentoo install I tried installing Arch
Linux (quicker than re-doing Gentoo from scratch), but the same
problem remained. In the end I reinstalled Gentoo from scratch, double
checked all the config, kernel etc, but still no locks.  I tried
running dvbscan and szap but again no transponders tuned and no locks.

This is where it gets strange, if I stop mythbackend and power cycle
the S660 (its a USB external tuner) without rebooting the computer.  I
can run dvbscan and szap without issue.  dvbscan finds all the
channels and szap happily tunes and locks the channels.  If I then
start mythbackend, I can't lock channels and running dvscan/szap fails
until I power cycle the device.  Running a channel (scan all
transports) from mythtv-setup times out trying to tune all transports
regardless if I have power cycled the device or not.  It seems
everytime a mythtv component touches the tuner it kills it.

I am running the following:
mythbackend version: fixes/0.24 [v0.24.1-101-g5da2367]
Linux Kernel Gentoo 3.0.6 (I have also tried running 2.6.39 kernel as
it seemed to stop working around the time I upgraded, but no luck)

I would appreciate any help you are able to provide trying to figure
this one out as its got me stumped.

Regards,
Mark