Dropout Diagnosis

Reception, channel detection, network issues, CableCARD setup, etc.
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A. Nonny Muss
Posts: 28
Joined: Thu Feb 02, 2017 8:06 pm

Dropout Diagnosis

Post by A. Nonny Muss »

For the last month or so, I've been experiencing dropouts with my HDHomeRun Prime (13129D38). My Quatro on the same network is doing just fine.

Seemingly every 3-10 minutes, I will get these dropouts where the bitrate tumbles. This happens on all devices on a range of channels and devices (Xbox, Mac, iOS, LG webOS DLNA), via the DVR and straight from the Prime.

Does this suggest the Prime is at fault, my networking gear (I changed the Prime/NAS from ports on the router to a switch) or something up the line that I'll have a difficult time explaining to a phone rep?

Example file:
https://www.dropbox.com/s/bpfw0gkd9vn29 ... 9.mpg?dl=0

Below is a debug log (UTC-6) for an hour after it had been tuned to that channel already for 20+ minutes. After capturing the above file, I caught another glitch in progress in the debug log.

Fri 03/06/2020
09:14 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-445/2290
dev: bps=38809216 resync=0 overflow=0
cc: bps=38810720 resync=1 overflow=0
ts: bps=11254432 te=0 crc=0
net: pps=1069 err=73914 stop=0

Fri 03/06/2020
09:46 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2269
dev: bps=38810720 resync=0 overflow=0
cc: bps=38810720 resync=1 overflow=0
ts: bps=12638112 te=0 crc=0
net: pps=1201 err=130044 stop=0

*** GLITCH IN EXAMPLE OCCURS ***

Fri 03/06/2020
09:51 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-445/2187
dev: bps=38798688 resync=0 overflow=0
cc: bps=77603392 resync=1 overflow=0
ts: bps=12495232 te=0 crc=0
net: pps=2595 err=164629 stop=0

Fri 03/06/2020
10:06 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2279
dev: bps=38809216 resync=0 overflow=0
cc: bps=38809216 resync=1 overflow=0
ts: bps=12568928 te=0 crc=0
net: pps=1194 err=164629 stop=0

Fri 03/06/2020
10:16 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2249
dev: bps=38809216 resync=0 overflow=0
cc: bps=38810720 resync=1 overflow=0
ts: bps=12526816 te=0 crc=0
net: pps=1190 err=169965 stop=0

*** RE-TUNED CHANNEL ***

Fri 03/06/2020
10:20 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2239
dev: bps=38810720 resync=0 overflow=0
cc: bps=38809216 resync=1 overflow=0
ts: bps=8592352 te=0 crc=0
net: pps=817 err=0 stop=0

*** GLITCH BEGINS ***

Fri 03/06/2020
10:20 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2239
dev: bps=38798688 resync=0 overflow=0
cc: bps=38800192 resync=1 overflow=0
ts: bps=12460640 te=0 crc=0
net: pps=476 err=11731 stop=0

Fri 03/06/2020
10:20 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2249
dev: bps=38809216 resync=0 overflow=0
cc: bps=38809216 resync=1 overflow=0
ts: bps=12552384 te=0 crc=0
net: pps=1193 err=14004 stop=0

*** GLITCH OVER ***

Fri 03/06/2020
10:21 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=94 snq=100 seq=100 dbg=-446/2239
dev: bps=38810720 resync=0 overflow=0
cc: bps=38810720 resync=1 overflow=0
ts: bps=12522304 te=0 crc=0
net: pps=1190 err=14004 stop=0

nickk
Silicondust
Posts: 15847
Joined: Tue Jan 13, 2004 9:39 am

Re: Dropout Diagnosis

Post by nickk »

Hi,

The net err count indicates the video stream isn't being accepted fast enough... either the network path between the HDHomeRun and the record engine can't keep up or the record engine writing to disk can't keep up.

Is there anything other than Ethernet in the network path between the HDHomeRun and the record engine?

What hardware is the record engine running on (platform, HDD connected via USB, etc)

Nick

A. Nonny Muss
Posts: 28
Joined: Thu Feb 02, 2017 8:06 pm

Re: Dropout Diagnosis

Post by A. Nonny Muss »

The hard-wired stuff is on the same switch. I used to have my single-disk MyCloud and the Prime plugged into my router; I moved them to my switch after the problem started and the issue continues. I see the same issue when I tune directly with DLNA on my TV or use the app or do a direct capture.

A. Nonny Muss
Posts: 28
Joined: Thu Feb 02, 2017 8:06 pm

Re: Dropout Diagnosis

Post by A. Nonny Muss »

I swapped out the switch that my Prime, Quatro and My Cloud are exclusively on and in limited testing, I am still getting glitches. In the process of untangling the rats nest, I discovered I was committing the cardinal sin of using the RF out of the tuning adapter to feed the Prime. By changing this, I got signal strength up to 100% from 94%.

A. Nonny Muss
Posts: 28
Joined: Thu Feb 02, 2017 8:06 pm

Re: Dropout Diagnosis

Post by A. Nonny Muss »

I pressure tested the system last night and had 6-7 concurrent recordings going on. All of the errors show on the Prime, none on the Quatro. I've tried a new switch and new cables. Is this just the Prime flaking out?

Sat 03/07/2020
11:40 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=100 snq=100 seq=100 dbg=-396/1646
dev: bps=38810720 resync=0 overflow=0
cc: bps=116432160 resync=2 overflow=0
ts: bps=12633600 te=0 crc=0
net: pps=1200 err=75080 stop=0

tun: ch=qam:297000000 lock=qam256:297000000 ss=100 snq=100 seq=100 dbg=-397/1226
dev: bps=38809216 resync=0 overflow=0
cc: bps=116432160 resync=2 overflow=0
ts: bps=11577792 te=0 crc=0
net: pps=1100 err=0 stop=0

tun: ch=qam:291000000 lock=qam256:291000000 ss=100 snq=100 seq=100 dbg=-401/1830
dev: bps=38810720 resync=0 overflow=0
cc: bps=116432160 resync=2 overflow=0
ts: bps=12725344 te=0 crc=0
net: pps=1209 err=0 stop=0

tun: ch=8vsb:599000000 lock=8vsb:599000000 ss=80 snq=97 seq=100 dbg=-5525/1631
dev: bps=19272256 resync=0 overflow=0
ts: bps=13033664 te=25 crc=0
net: pps=1241 err=0 stop=0

tun: ch=8vsb:533000000 lock=8vsb:533000000 ss=91 snq=96 seq=100 dbg=-4875/-2923
dev: bps=19636224 resync=0 overflow=0
ts: bps=11168704 te=0 crc=0
net: pps=1061 err=0 stop=0

tun: ch=8vsb:527000000 lock=8vsb:527000000 ss=100 snq=100 seq=100 dbg=-3800/1036
dev: bps=19251200 resync=0 overflow=0
ts: bps=7211680 te=0 crc=0
net: pps=685 err=0 stop=0

tun: ch=8vsb:647000000 lock=8vsb:647000000 ss=84 snq=100 seq=100 dbg=-5250/-544
dev: bps=19251200 resync=0 overflow=0
ts: bps=10302400 te=0 crc=0
net: pps=980 err=0 stop=0


Sat 03/07/2020
11:56 PM
tun: ch=qam:273000000 lock=qam256:273000000 ss=100 snq=100 seq=100 dbg=-397/1451
dev: bps=38810720 resync=0 overflow=0
cc: bps=116430656 resync=3 overflow=0
ts: bps=12350848 te=0 crc=0
net: pps=1173 err=150338 stop=0

tun: ch=qam:297000000 lock=qam256:297000000 ss=100 snq=100 seq=100 dbg=-398/1155
dev: bps=38809216 resync=0 overflow=0
cc: bps=116430656 resync=3 overflow=0
ts: bps=10884448 te=0 crc=0
net: pps=1035 err=57028 stop=0

tun: ch=qam:291000000 lock=qam256:291000000 ss=100 snq=100 seq=100 dbg=-399/1707
dev: bps=38810720 resync=0 overflow=0
cc: bps=116430656 resync=3 overflow=0
ts: bps=11024320 te=0 crc=0
net: pps=1049 err=73125 stop=0

tun: ch=8vsb:599000000 lock=8vsb:599000000 ss=79 snq=95 seq=100 dbg=-5550/2143
dev: bps=19251200 resync=0 overflow=0
ts: bps=9684256 te=25 crc=0
net: pps=920 err=0 stop=0

tun: ch=8vsb:533000000 lock=8vsb:533000000 ss=90 snq=99 seq=100 dbg=-4925/-2604
dev: bps=19636224 resync=0 overflow=0
ts: bps=7628288 te=0 crc=0
net: pps=725 err=0 stop=0

tun: ch=8vsb:527000000 lock=8vsb:527000000 ss=100 snq=100 seq=100 dbg=-3800/1580
dev: bps=19251200 resync=0 overflow=0
ts: bps=6822144 te=0 crc=0
net: pps=648 err=0 stop=0

tun: ch=8vsb:647000000 lock=8vsb:647000000 ss=84 snq=100 seq=100 dbg=-5250/-136
dev: bps=19329408 resync=0 overflow=0
ts: bps=9759456 te=0 crc=0
net: pps=930 err=0 stop=0

jasonl
Expert
Posts: 15222
Joined: Sun Oct 28, 2007 9:23 pm

Re: Dropout Diagnosis

Post by jasonl »

Any WeMo devices on your network by chance?

A. Nonny Muss
Posts: 28
Joined: Thu Feb 02, 2017 8:06 pm

Re: Dropout Diagnosis

Post by A. Nonny Muss »

Yes, a number of them.

jasonl
Expert
Posts: 15222
Joined: Sun Oct 28, 2007 9:23 pm

Re: Dropout Diagnosis

Post by jasonl »

That would do it. There's something wrong with them that causes them to intermittently flood the network and cause packet loss like that.

A. Nonny Muss
Posts: 28
Joined: Thu Feb 02, 2017 8:06 pm

Re: Dropout Diagnosis

Post by A. Nonny Muss »

I moved all (nine!) Wemo devices to a separate SSID that I rate limited to 1 mbps and the error count has been zero through three hours.

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