<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, May 9, 2022 at 7:41 AM Paul Harrison <<a href="mailto:mythtv@mythqml.net">mythtv@mythqml.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>On 09/05/2022 11:41, James Abernathy wrote:<br>
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<div dir="ltr" class="gmail_attr">On Sun, May 8, 2022 at 8:39
AM James Abernathy <<a href="mailto:jfabernathy@gmail.com" target="_blank">jfabernathy@gmail.com</a>>
wrote:<br>
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<div>Results of my first test of the Hauppauge WinTV
Quad HD in a new system with Ubuntu 20.04.3 LTS and
mythtv v31.</div>
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<div>I installed Ubuntu 20.04.3 minimal and added the
apt repository for v31. The install was as expected
and I setup the 4 tuners to correspond to the Quad
tuner PCIe card.</div>
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<div>I used a table top antenna in my lab since I didn't
have a tap for the big attic antenna. I could not get
the PBS station 40 miles away as expected but the
nearby stations all scanned. While watching LiveTV, I
noticed that the signal strength displayed was 80-100%
instead of 40-50% in V32 Ubuntu 22.04, my production
backend. </div>
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<div>I'll try later today or tomorrow to move the test
PC to a room that can access the same 8-way splitter
that all my other tuners and tvs are connected to. At
this point it's looking like the difference between
v31 and v32 or Ubuntu 20.04 and 22.04.</div>
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<div>Where I'm located with respect to the TV towers you
can get great signals with a coat hanger jammed into
the F-connector. </div>
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<div>Jim A</div>
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<div>I've narrowed down when the signal reporting gets
changed. On my newly built test system with MythTV v31 on
Ubuntu 20.04.3 LTS my signals were reported as ~100% on most
of my channels using my Hauppauge WinTV quadTV as it had for
years on my production backend.</div>
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<div>I added the ppa:mythbuntu/32 repository and upgraded to
v32. The system updated all 21 packages and everything was
working as before but now on v32.</div>
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<div>But when I use Watch Live TV all my reported signal
strengths were between 40-50%. So the change is MythTV v32
related and not the version of Ubuntu. The OS remained at
Ubuntu 20.04 with latest patches without any package updates
to Linux during this test.</div>
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<div>Jim A</div>
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<p>Could be this commit which changed the signal strength range for
DVBv5 :- <br>
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<p><a href="https://github.com/MythTV/mythtv/commit/5d76841b8c1878" target="_blank">https://github.com/MythTV/mythtv/commit/5d76841b8c1878</a></p>
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<p>You could try starting the backend with --dvbv3 to see what you
get with the old DVB v3 API.</p>
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<p>Like other have said if it not causing you any problems then I
wouldn't worry to much about it. <br>
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<p>Paul H.</p></div></blockquote><div>You are correct. Starting the mythtv-backend with --dvbv3 does restore the signal strength to what I was seeing on v31. </div><div><br></div><div>So what I'm hearing is by default in v32 the signal strength is based on dbm instead of %. Are there any problems using --dvbv3 instead of the default??</div><div><br></div><div>Jim A</div><div><br></div><div><br></div></div></div>