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Opened 4 years ago

Closed 4 years ago

Last modified 3 years ago

#8074 closed defect (wontfix)

Cannot scan channels on Hauppauge HVR-1300 (cx88) DVB-T

Reported by: kas@… Owned by: danielk
Priority: minor Milestone: unknown
Component: MythTV - Channel Scanner Version: 0.22
Severity: high Keywords: cx88 HVR-1300 scan
Cc: Ticket locked: no

Description

I am trying to setup MythTV on Fedora 12 with Hauppauge HVR-1300 DVB-T card (cx88-dvb driver; the card also has an analog tuner which I don't want to use). With 0.22 in Fedora 12, I can see the DVB-T card, but I cannot scan or tune any channel.

I have tried either to do a full autoscan or to feed a working channels.conf to it, but mythtv cannot find any channel. I have tried to extend the timeouts in the DVB-T card config, but it still did not help.

When I use "tzap <channel_name>", I have FE_HAS_LOCK in about two or three seconds. Also kaffeine works both with autoscan and with selecting the location (i.e. using the /usr/share/dvb-apps/dvb-t/cz-Brno file describing my location).

Attachments (1)

8074-v1.patch (1.5 KB) - added by danielk 3 years ago.
Workaround patch

Download all attachments as: .zip

Change History (21)

comment:1 follow-up: Changed 4 years ago by pstehlik@…

Care to try out the #8060 patch and report if it helps?

comment:2 Changed 4 years ago by kas@…

I will try it, but firstly I have to figure out how to build MythTV from the source RPMs.

comment:3 in reply to: ↑ 1 Changed 4 years ago by kas@…

Replying to pstehlik@…:

Care to try out the #8060 patch and report if it helps?

Tried, it did not help. Autoscan still says "timeout, no channels".

comment:4 follow-up: Changed 4 years ago by yianniv

(I know it's not a support forum, so let me apologize for this, but I don't know if kas@ follows the users list. So...)

Please try increasing the signal timeout in mythtv-setup for your dvb-t card. Mine (Lifeview Trio) can scan channels only when signal timeout is equal or above 2500 ms.

comment:5 in reply to: ↑ 4 Changed 4 years ago by kas@…

Replying to yianniv:

Please try increasing the signal timeout in mythtv-setup for your dvb-t card. Mine (Lifeview Trio) can scan channels only when signal timeout is equal or above 2500 ms.

I have both signal timeout and tuning timeout set to 10000 msec.

[ no, I don't follow the mailing list ]

comment:6 Changed 4 years ago by martin@…

I See the same problem, hvae you found a solution

comment:7 Changed 4 years ago by kas@…

Nope (apart from using kaffeine instead).

comment:8 Changed 4 years ago by robertm

  • Status changed from new to infoneeded_new

Please test the patch on #8303 and use the czech frequency table.

comment:9 Changed 4 years ago by robertm

  • Component changed from MythTV - General to MythTV - Channel Scanner
  • Owner changed from ijr to danielk
  • Status changed from infoneeded_new to new

comment:10 Changed 4 years ago by robertm

  • Status changed from new to infoneeded_new

comment:11 Changed 4 years ago by kas@…

The patch does not apply to my 0.22 sources. I have applied the patch #8060 and edited the czech frequency table by by hand as described in patch #8303 (0 -> 125000 in the penultimate argument.

The resulting mythtv still cannot find any channels, even when the Czech frequency table is selected.

Should I try to build the latest SVN source?

comment:12 Changed 4 years ago by robertm

  • Status changed from infoneeded_new to new

comment:13 Changed 4 years ago by bglu@…

Hi! I have the same problem and tried to create a Channels.conf file using scan .... and tested the card with mplayer. This worked OK for me in an old slow Dell 800mHz. I selected Import channels.conf in MythTv? config to get a channel list and a scan from the imported channel list, this worked OK, even to record a TV program, worked fine on the background server.
But sins this PC is to slow (and old), I tried to do the same in FS Scaleo E but I can't get the channel scan to work even with the channels.conf file, it won't lock to the channels. Now I have tried most of the possible ways to setup this and are out of ideers. Hope this info might help your developers, if you know it worked once if it had a channels.conf file as extra input. I'm new to linux so I'm not sure I can give more info to you. BR Bo-Göran

comment:14 Changed 4 years ago by robertm

  • Status changed from new to assigned

comment:15 Changed 4 years ago by danielk

  • Resolution set to wontfix
  • Status changed from assigned to closed

This was reported against an old version with a very different channel scanner + there are no logs + this card has known issues with MythTV.

comment:16 Changed 4 years ago by anonymous

Pardon me, but is "card has known issues with MythTV" a valid reason of why MythTV should not be fixed? I would think exactly the opposite.

Also, I don't remember anyone requesting more logs or anything I failed to provide.

But anyway, thanks for making the time I have invested in reporting the bug and testing the patches wasted :-(

Sorry, couldn't resist.

comment:17 Changed 4 years ago by robertm

kas, we cannot realistically continue to load Myth down with workarounds for specific driver issues. MythTV has issues with the card in that it exposes driver weaknesses. Please report issues with tuning/etc. upstream with driver devs, and they can work with us to try to figure out what the driver issue is and fix it. Then, everyone wins. Myth is a more complicated consumer of the video4linux APIs than most other applications, so there is no direct apples-to-apples comparison when it comes to tuning/scanning/capture.

If you would like to understand more or follow up, please do so on one of our mailing lists.

comment:18 Changed 4 years ago by c.pettit@…

This problem is not unique to the hvr-1300. I've just dropped an hvr-1110 (SAA7134 based board) into the box and it behaves as described for the hvr-1300.

comment:19 Changed 4 years ago by c.pettit@…

I withdraw my comments about the HVR-1110. It just tunes funny. This information may be useful in tracking down the HVR-1300 issues. Where I am, the DVB streams are between channels 21 and 31. Scanning using HVR-1110 reveals no streams between these channels and I was therefore aborting the scan. However, during one scan I left it unattended only to discover the scan had completed and found DVB streams. So I ran it again and watched it all the way.

It tuned all the way from 21 to 68 and found nothing but then appeared to fall off the end of and found loads of streams. Creating channels.conf with tzap reveals that the streams are indeed between 21 and 31. So its just a quirk of the card. So the card is exonerated. This information may halp with the diagnostics of the HVR-1300 issues.

comment:20 Changed 3 years ago by fgunni@…

The real bug seems to be found.
Hope this gets into kernel quick.

http://www.kernellabs.com/blog/?p=1568

So now some text just to get this post through the spamfilter.

Changed 3 years ago by danielk

Workaround patch

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