[mythtv-users] Signal strength now reporting 50% instead of 100%
mythtv at mythqml.net
Mon May 9 11:40:41 UTC 2022
On 09/05/2022 11:41, James Abernathy wrote:
> On Sun, May 8, 2022 at 8:39 AM James Abernathy <jfabernathy at gmail.com>
> Results of my first test of the Hauppauge WinTV Quad HD in a new
> system with Ubuntu 20.04.3 LTS and mythtv v31.
> 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.
> 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.
> 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.
> Where I'm located with respect to the TV towers you can get great
> signals with a coat hanger jammed into the F-connector.
> Jim A
> 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.
> 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.
> 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.
> Jim A
Could be this commit which changed the signal strength range for DVBv5 :-
You could try starting the backend with --dvbv3 to see what you get
with the old DVB v3 API.
Like other have said if it not causing you any problems then I wouldn't
worry to much about it.
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