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<div class="moz-cite-prefix">On 27/11/2018 11:35, Daryl McDonald
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMwtTBDfLE6qxA1QN2y+aAQQOdmZmAodcUkqNUUwZSGHuV5NtA@mail.gmail.com">
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<div dir="auto">Due to recent hardware problems I've ordered a new
motherboard, and because it has more PCI slots I've ordered more
tuners. Since I now have only one source for recording Udev
rules wont be necessary because it wont matter which tuner is
asked to record, or will it?
<div dir="auto"><br>
</div>
<div dir="auto">I may just create them anyway, but it wont be
without challenge, because one card is the same model as an
existing card. Daryl</div>
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<br>
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<p>I have never got a dual card working reliably. <tt>They tend to
fail about once a week on boot. (multiple single tuner cards
have been completely reliable). A reboot always fixes the
problem and the cards are then 100% reliable until power on.</tt></p>
<p>I have been using the "Example for twin tuner cards with no
difference in udevadm info output" from the wiki<br>
</p>
<p><a moz-do-not-send="true"
href="https://www.mythtv.org/wiki/Device_Filenames_and_udev">https://www.mythtv.org/wiki/Device_Filenames_and_udev</a><br>
</p>
<p>but having re-read it (maybe its been updated) I think my problem
is the race condition as described in "More complicated setup with
multi-tuner cards having no difference in udevadm info output
coexisting with other cards based on the same A/V decoder" . The
issue being that it is possible to receive adapterX with frontend
from adapterY. The symptom being the tuner gets the signal ok but
with only a partial lock because it cant find the channel its
looking for in the stream.</p>
<p>So I am currently testing a dual PCI and a dual USB card together
without using udev. Its been a week with no issues but I know this
is perhaps only luck.</p>
<p>Trying to get my head round the solution proposed in "More
complicated setup with multi-tuner cards having no difference in
udevadm info output coexisting with other cards based on the same
A/V decoder" but having difficulty understanding it.</p>
<p>The bottom line is - if you get partial tuner locks on a dual
card with errors like this /dev/dvb/adapter2/frontend0): Wrong
PMT; pmt->pn(6033) desired(6031) the solution possibly lies at
the end of the wiki.<br>
</p>
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