<div class="gmail_quote">On 10 November 2011 23:27, William Kenworthy <span dir="ltr"><<a href="mailto:billk@iinet.net.au">billk@iinet.net.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On Fri, 2011-11-11 at 08:45 +1000, David Whyte wrote:<br>
> On Fri, Nov 11, 2011 at 8:12 AM, Thomas Boehm<br>
> <<a href="mailto:mythtv-users@lists.boehmi.net">mythtv-users@lists.boehmi.net</a>> wrote:<br>
><br>
> > That's what I meant above. Shut down your PC completely. If your USB<br>
> > ports are still powered after a shutdown, look in your BIOS to power<br>
> > them down.<br>
> ><br>
><br>
> In the past with my tuners based on these chips, I had to really power<br>
> off the server. I would shutdown the OS, remove power from the PSU,<br>
> try to turn on the PC (the fans would turn momentarily), scratch my<br>
> head for 30seconds, just to be sure there is no power in the system,<br>
> replace power lead and boot up.<br>
><br>
> This forces the tuner chip to boot from 'cold, which will include a<br>
> reload of the firmware. If it is doing a 'warm' boot, it already has<br>
> the firmware and doesn't reload it.<br>
><br>
> You should see messages in dmesg which relate to 'dvb' or 'DVB' and<br>
> indicate whether it is a warm or cold boot.<br>
><br>
<br>
<br>
</div>I have two usb thingies using this chip with gentoo - this might give<br>
some clues.<br>
<br>
I power off (at the mains via a remote switch every night, the machine<br>
hibernates to disk. If the signal is weak/not present at the chip<br>
antenna, they often will not come back online. Also, if mythbackend is<br>
running when the machine is un-hibernating (is that a word :), the chip<br>
wont initialise.<br>
<br>
Fix for me is to stop mythbackend, remove all modules loaded when<br>
inserted (tda18218,af9013,dvb_usb_af9015), make sure the signal is ok<br>
then reload modules and restart mythbackend<br>
<br>
Its not having a signal present when its loading up that seems to be the<br>
root cause of most problems - but its pretty random, works a few times<br>
then just refuses until until the modules are reloaded. In a very few<br>
cases, pulling/reinserting the usb key is needed as well but having a<br>
reliable signal when coming online was the main "fix".<br></blockquote><div><br>just to be clear, my BE is on 24/7.<br>full power off (with usb keep-alive off) gets the usb device working. although this is effectively the same as unplugging it as the USB device looses power.<br>
<br>signal-at-startup shouldn't be an issue, as it's wired into the house antenna, and the BE is in the loft. when i do have a working stick, signal is around the 90% mark, so it's not a weak signal either.<br>
</div></div>