OE + TVHeadend scan fail

andy f

I have been trying to get live TV on Raspberry Pi 2 with OpenELEC 5.02, TVHeadend, and WinTV-HVR950 (not HVR950Q) tuner. I think I am getting close but am not quite there yet. TVHeadend scans but fails to find any channels. My antenna is not the problem; I have very good signal quality on many stations when I connect the antenna to a TV.

I am probably missing something in the TVHeadend configuration. Here are the steps I followed to configure TVHeadend:

1) Went to IP address:9981 and navigated to Configuration>DVB Inputs>Networks tab, clicked "Add" and added ATSC network and selected Pre-defined Muxes: us-ATSC-center-frequencies-8VSB (see networks.png attached)

2) Selected Configuration>DVB>TV Adapters and selected my tuner (LG Electronics LGDT3303 VSB/QAM Frontend:ATSC #0) and added my network (OTA FreeTV) (see TV_adapters.png attached)

3) After scan is complete all channels show "fail" (see fail.png attached)

Is this a TVHeadend setup issue or do I have some other problem? TVHeadend appears to be seeing the HVR950 tuner OK. If I unplug the HVR950 tuner from the USB port then the tuner no longer shows up in the TV Adapters tab of TVHeadend but shows up again when I plug it back in.

I would very much appreciate any help and advice!!

mpmc

If your TV has a diag page (most do) that displays signal details, frequency etc try adding that into Tvheadend.

The pre-defined mux list can be seriously out of date.

Also check that your tuner is OK by using it in another system, Windows for example.

Maury Markowitz

On Networks, try turning on "idle scan muxes", restart, force scan and WAIT. Wait like an hour.

I find it interesting that your adaptor is the same as mine, but mine says "kWorld" on the outside.

andy f

Mark & Maury, thank you for your suggestions. Still no luck on getting a successful scan.

- from Maury: went to Configuration>DVB Inputs>Networks, selected network, then selected Edit, checked box for "Idle Scan Muxes" and waited 2 hours. On the Muxes tab all of the channels still show "FAIL" for scan result. BTW the adapter appears to show the ID of the tuner IC; your kWorld and the Hauppauge HVR-950 evidently both used the same LGDT3303 tuner IC.

- from Mark: The mux list showed all 68 channels allocated in US. The frequency allocations do not change so I'm not sure how that can be out of date but I deleted them all and manually added only the known local channels per your suggestion. When scan completes result is still "FAIL"

- from Mark: trying the tuner on a Windows system is a good suggestion but not practical at this point. I bought the tuner some time ago and the software is for XP. It will not install on Vista or Win 7 and I do not have an XP box anymore. I don't want to purchase new software from Hauppauge just for a one time test. It's possible the tuner went bad sitting on the shelf but it worked the last time I used it several years ago. I can query the tuner using the lsusb -v command and get the appropriate response and it shows up in the list of adapters so all indications are that it's working.

Is there anything else in TVHeadend setup I might not have done that would cause the Muxes scan to fail?

Thank you very much for your suggestions and advise.

Andy

mpmc

What about firmware? Do you have that? https://www.linuxtv.org/wiki/index.php/Hauppauge_WinTV-HVR-950 says your tuner needs one..

andy f

Yes, file xc3028-v27.fw is in /lib/firmware

The link you referenced shows the output of lsusb -v command with this tuner. The descriptor I see (attached) is nearly but not exactly the same.

Thanks for your help and any other suggestions you might have.

Andy

mpmc

andy f wrote:
> Yes, file xc3028-v27.fw is in /lib/firmware
>
> The link you referenced shows the output of lsusb -v command with this tuner. The descriptor I see (attached) is nearly but not exactly the same.
>
> Thanks for your help and any other suggestions you might have.
>

> Andy

What about doing this: https://tvheadend.org/issues/3483#note-9

andy f

Thanks Mark. I deleted all of the entries on the Muxes tab, then clicked Add to manually enter a few local channels and selected VSB/8 for modulation. Still no go.

I noticed something in the tuner descriptor file that may or may not be significant. When I boot into Raspbian and load the firmware for the tuner (xc3028-v27.fw), then run lsusb -v it returns the descriptor file below labeled "Raspbian_lsusb_HVR-950 descriptor.txt". If I boot into openelec and ssh in and run lsusb -v it returns the attached file "openelec_lsusb_HVR-950_descriptor.txt". The two files are the same except for lines 16 and 17.

Lines 16 & 17 from "Raspbian_lsusb_HVR-950 descriptor.txt"
iProduct 1 WinTV HVR-980

iSerial 2 4027598479

Lines 16 & 17 from "openelec_lsusb_HVR-950_descriptor.txt"
iProduct 1 (error)

iSerial 2 (error)

Is this significant or a just red herring?

I did a cmp and the xc3028-v27.fw firmware in the Raspbian boot is the same as the xc3028-v27.fw in openelec.

Thanks again for help and suggestions.

Andy

mpmc

andy f wrote:
> Thanks Mark. I deleted all of the entries on the Muxes tab, then clicked Add to manually enter a few local channels and selected VSB/8 for modulation. Still no go.
>
> I noticed something in the tuner descriptor file that may or may not be significant. When I boot into Raspbian and load the firmware for the tuner (xc3028-v27.fw), then run lsusb -v it returns the descriptor file below labeled "Raspbian_lsusb_HVR-950 descriptor.txt". If I boot into openelec and ssh in and run lsusb -v it returns the attached file "openelec_lsusb_HVR-950_descriptor.txt". The two files are the same except for lines 16 and 17.
>
> Lines 16 & 17 from "Raspbian_lsusb_HVR-950 descriptor.txt"
> iProduct 1 WinTV HVR-980
> iSerial 2 4027598479
>
> Lines 16 & 17 from "openelec_lsusb_HVR-950_descriptor.txt"
> iProduct 1 (error)
> iSerial 2 (error)
>
> Is this significant or a just red herring?
>
> I did a cmp and the xc3028-v27.fw firmware in the Raspbian boot is the same as the xc3028-v27.fw in openelec.
>
> Thanks again for help and suggestions.
>

> Andy

I think all that means is that openelec can't probe the device whether that's an indication I have no idea. Have you tried scanning using the raspbian install, using either w_scan or tvheadend?

andy f

Thanks for the suggestion Mark. I didn't know TVheadend could be installed standalone without media center software and also wasn't aware of w_scan. I will investigate both options.

Thanks!
Andy