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AphexFinn
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PostPosted: Sat Mar 04, 2006 12:17 am    Post subject: MythTV (any version) and nvidia use flag causes Segmentation Reply with quote

Hello - this isnt strictly about 0.19, but i have had MythTV 0.18.1-r1 running with my PVR-350 for several months now with no problems. I decided it was time to free up my PCI Slot for another TV Card so I bought an Gigabyte Nvida 6600GT PCI-e video card, I was going to use this for the mpeg decoding.

However - since building mythtv with the nvida use flag mythtv seg faults.

I decided after reading this post to try 0.19 and I get the same results - any ideas?
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Hobbes-X
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PostPosted: Sat Mar 04, 2006 9:18 am    Post subject: Reply with quote

woZa wrote:
I too am unable to watch Live TV. Screen drops back to menu after serveral seconds. The backend error when trying is
Code:

2006-03-03 14:42:01.565 TVRec(1) Error: Start channel from DB is empty, setting to '' instead.
2006-03-03 14:42:01.566 TVRec(1) Error: Start channel invalid, setting to '' on input DVBInput instead.
2006-03-03 14:42:01.566 TVRec(1) Error: Problem finding starting channel, setting to default of '3'.
2006-03-03 14:42:01.567 DVB#0 ERROR - Could not find dvb tuning parameters for mplex 0
2006-03-03 14:42:01.567 DVB#0 ERROR - Failed to get channel options for channel 3.
2006-03-03 14:42:01.567 TVRec(1) Error: Failed to set channel to 3.


Any ideas?


Looks similar to: http://www.gossamer-threads.com/lists/mythtv/users/182344?search_string=DVB%230%20ERROR%20-%20Failed%20to%20get%20channel%20options%20for%20channel%203;#182344
Might be some help?
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timbo
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PostPosted: Mon Mar 06, 2006 11:38 pm    Post subject: Reply with quote

Well my upgrade from 0.18.x to 0.19 went mostly without a hitch, no emerge erros etc but a couple of strange problems...

1 - on two channels the audio seems to be pausing or going quiet then back up it's hard to tell but I've never noticed this before. On another channel which has really bad reception it does not do this so it can't be signal strength.
Checked my log's last night and the channels that these pauses are on also have "rebuffering" log entry's at the same time...
2 - MythVideo settings got screwed up, now I can't select a file to play next and if I try to play a movie it may not select the first file of, say, three so my daughter will see Bug's Life for the middle.
3 - can't get xmame to work or PC games, have not spent much time on this yet though.

Helper's...

Tim
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PostPosted: Thu Mar 09, 2006 7:41 am    Post subject: Re: MythTV (any version) and nvidia use flag causes Segmenta Reply with quote

AphexFinn wrote:
Hello - this isnt strictly about 0.19, but i have had MythTV 0.18.1-r1 running with my PVR-350 for several months now with no problems. I decided it was time to free up my PCI Slot for another TV Card so I bought an Gigabyte Nvida 6600GT PCI-e video card, I was going to use this for the mpeg decoding.

However - since building mythtv with the nvida use flag mythtv seg faults.

I decided after reading this post to try 0.19 and I get the same results - any ideas?

I am also inerested of a solution. I have the same card you are using and when i use livet tv i sometimes get seg fault and frontend just dies.
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Hobbes-X
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PostPosted: Thu Mar 09, 2006 6:44 pm    Post subject: Reply with quote

For what it's worth, I've seen lots of reports on the myth-dev list where nvidia drivers make a difference. Many people have problems with anything after revision 7667, and some still have problems there and end up falling back to the 6xxx series.

EDIT: And of course, now that I say that, I see a post recommending the 8xxx series :D
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FormerSlacker
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PostPosted: Fri Mar 10, 2006 6:16 am    Post subject: Reply with quote

If I turn on the OpenGL timing option, CPU usage jumps to 100%. Is this an Nvidia driver version issue as well?
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Hobbes-X
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PostPosted: Fri Mar 10, 2006 6:48 am    Post subject: Reply with quote

FormerSlacker wrote:
If I turn on the OpenGL timing option, CPU usage jumps to 100%. Is this an Nvidia driver version issue as well?


Looks like it might be: http://www.gossamer-threads.com/lists/mythtv/users/180595?search_string=OpenGL%20timing%20nvidia;#180595
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woZa
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PostPosted: Sat Mar 11, 2006 7:52 pm    Post subject: Reply with quote

Hobbes-X wrote:
woZa wrote:
I too am unable to watch Live TV. Screen drops back to menu after serveral seconds. The backend error when trying is
Code:

2006-03-03 14:42:01.565 TVRec(1) Error: Start channel from DB is empty, setting to '' instead.
2006-03-03 14:42:01.566 TVRec(1) Error: Start channel invalid, setting to '' on input DVBInput instead.
2006-03-03 14:42:01.566 TVRec(1) Error: Problem finding starting channel, setting to default of '3'.
2006-03-03 14:42:01.567 DVB#0 ERROR - Could not find dvb tuning parameters for mplex 0
2006-03-03 14:42:01.567 DVB#0 ERROR - Failed to get channel options for channel 3.
2006-03-03 14:42:01.567 TVRec(1) Error: Failed to set channel to 3.


Any ideas?


Looks similar to: http://www.gossamer-threads.com/lists/mythtv/users/182344?search_string=DVB%230%20ERROR%20-%20Failed%20to%20get%20channel%20options%20for%20channel%203;#182344
Might be some help?


Nice one! That was the problem. Seemed that
Code:
mythfilldatabase
wasn't filling the database... Fiddled with some things and now it is. Working nicely apart from taking about 15-20 seconds to tune in to each channel. Was about 5 seconds with 0.18.

Thanks again Hobbes-X
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PostPosted: Sat Mar 18, 2006 4:05 pm    Post subject: Re: MythTV (any version) and nvidia use flag causes Segmenta Reply with quote

AphexFinn wrote:
Hello - this isnt strictly about 0.19, but i have had MythTV 0.18.1-r1 running with my PVR-350 for several months now with no problems. I decided it was time to free up my PCI Slot for another TV Card so I bought an Gigabyte Nvida 6600GT PCI-e video card, I was going to use this for the mpeg decoding.

However - since building mythtv with the nvida use flag mythtv seg faults.

I decided after reading this post to try 0.19 and I get the same results - any ideas?

I have always have nvidia in my use flag. After upgrading to the latest release (mythtv-0.19_p9163-r1) of mythtv I got a seg fault when I start mythfrontend. Mythtv-0.19_p9163 worked fine before upgrading but downgrading to that release didn't fix the seg fault.

Last time I run "emerge -u world" I remember the system upgraded gcc (from 3.3.6 to 3.4.5) and mythtv. After I downgraded gcc to 3.3.6 and emerged mythtv again everything works OK and the seg fault is history.
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Icer
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PostPosted: Sun Mar 19, 2006 9:33 pm    Post subject: Reply with quote

I got mythtv running quite smoothly now. Though I've been lazy lately because I still need to try tv-out and fix lirc. Anyway where I live there's not much incentive at the moment to move from analog tv to DVB. Programs suck on DVB as much as on analog TV. Sorry about that venting, thats just IMO.

I got a question too. Is it so that one has to change all myth programs to be owned by mythtv:users? I just changed mythfilldatabase ownership and I think it fixed the nag about permissions when starting frontend(or was it backend). Wasnt very obvious to me. If that is a fix then it would be a good addition to manual/help files to mention all files one has to chown. Or better yet have somekind of script to automate that.

Also is it so that one has to start backend without using the init.d startup script? Last time I checked it didnt work very well. Hopefully that is going to be fixed. How can one shutdown mythbackend cleanly if we cant use shutdown/stop script?

Btw, thanks for all posters on this thread. Could have been much harder to get myth working without your posts. :)
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PostPosted: Mon Mar 20, 2006 1:41 am    Post subject: Reply with quote

Hobbes-X wrote:
FormerSlacker wrote:
If I turn on the OpenGL timing option, CPU usage jumps to 100%. Is this an Nvidia driver version issue as well?


Looks like it might be: http://www.gossamer-threads.com/lists/mythtv/users/180595?search_string=OpenGL%20timing%20nvidia;#180595


Thanks for the link Hobbes.
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phunatic
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PostPosted: Sun Mar 26, 2006 10:45 pm    Post subject: mythtv 0.19 Reply with quote

i guess i wasted all my weekend trying to get mythtv run, and i thought i am not really a n00b. feels like one tho.
after trying emerge which was 0.18 or so, tried with the official source, seems to build ok after a make distclean i finally got rid of the
protocol mismatch (guess that was from the first gentoo emerge leftovers?).
the shit with the xmltv stuff is mostly annoying (especially when your from switzerland and even the german tvtoday thing is fucked up),
just wanted to see tv, is like bullshit. got a plextor convertx and a small pentium m system, everything else works fine.
had a streaming server with wis-streamer (http://www.live555.com/wis-streamer/) set up in no time like it should be but mythtv really sucks!
if you had a different experience let me know how the f#$% u did it ;)
greetings
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MasterC
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PostPosted: Thu Mar 30, 2006 6:14 am    Post subject: Reply with quote

I remember before Zap2It was available, one of the huge obstacles for me trying any of the TV Applications was XMLTV, it just seemed impossible to work with, so I feel for ya.

Other than the program guide info, did you have other problems getting it installed, or was it just the XMLTV portion really turned you off?

It sounds, from your description anyway, that you don't really need a PVR anyway, maybe TVTime or XawTV would be more along the lines of an application you are looking for.

Good luck!

Chad
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depontius
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PostPosted: Tue Apr 04, 2006 1:35 am    Post subject: Reply with quote

RoundsToZero wrote:

For the record, I think the changelog says uses 7676 or lower. So depending on how much you "updated" your drivers, you might have made the problem worse (at least on your nvidia system). I use the stable 6629 and everything works fine on 2.6.15 with an HD3000 and mythtv 0.18.1. Of course stuff like this should only affect the frontend system. The fact that it doesn't work on radeon either still suspect of course, and maybe something is wrong with the backend. Do you have a proper starting channel selected for your input source? Sometimes if you don't have one set right it won't work if you try to watch even for the first time.


Did you do anything to get the 6629 drivers running with 2.6.15? When I try that, I get the black screen, though the system is still responsive, so I can ssh in and fix things.

A while back I also tried the 8xxx drivers, found that they interacted badly with mythtv 0.18.1, and went back to 6629 on advice found somewhere in the forums. Just for jollies, and based on some other reading, I tried the 7676 drivers, and found that they wouldn't work with 2.6.14 - something about "valid screen not found", so it appeared to not like my xorg.conf, though 6629 likes it just fine, and IIRC 88xx used to, too. To be honest, I haven't bugged hard on this, yet. I figure if this is well known stuff I"ll save myself the effort, otherwise I'll set aside some time to check it out more thoroughly.

Searching in the forums here, I've also seen some noise about changing the GART settings to get things working with 2.6.15. Have you done that?
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PostPosted: Tue Apr 04, 2006 9:14 pm    Post subject: Reply with quote

I use latest nvidia driver. In mythtv I disable opengl sync or sonething like that. I dont use xv or xvmc. When emerging mythtv I dont use nvidia use flags. Why? Because I think I got no choice since my motherboard has nvidia 6150 chipset which I think isnt supported by earlier drivers. Anyway mythtv runs just fine.
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PostPosted: Wed Apr 05, 2006 11:47 am    Post subject: Reply with quote

Note that this is a frontend-only system I'm talking about. When I used 1.0.8xxx drivers, playing video took 100% CPU and skipped frames and sound. I saw some notes here in the forums, and went back to stable 1.0.6629, and playback dropped back to about 25% CPU, with no skipped frames or sound. I hadn't bothered to try anything in the 1.0.7xxx range. I believe I tried xvmc, but had hangs with it, and rebuilt without it.

Recently I realized that this system was still running 2.6.14-gentoo-r5, and decided to build 2.6.15-gentoo-r1, also so I could play with the nForce2 FSB cpufreq stuff, for power and heat savings. The system came up to a black screen, though I could still ssh in, so it was a display-only problem. Back to 2.6.14-r5, I tried moving to nVidia 1.0.7676, based on forum exchanges, and was going to try bringing that forward to 2.6.15-r1. But it failed to start properly. I have not yet begun to debug, but figured I'd find more here, first.
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PostPosted: Mon Apr 10, 2006 7:31 am    Post subject: Re: mythtv 0.19 Reply with quote

phunatic wrote:
i guess i wasted all my weekend trying to get mythtv run, and i thought i am not really a n00b. feels like one tho.
after trying emerge which was 0.18 or so, tried with the official source, seems to build ok after a make distclean i finally got rid of the protocol mismatch (guess that was from the first gentoo emerge leftovers?).
the shit with the xmltv stuff is mostly annoying (especially when your from switzerland and even the german tvtoday thing is fucked up),
greetings


The official 0.18 mythtv from portage worked quite well for me. no problems whatsoever. but there's really a ton of stiff that can go wrong.

As for xmltv, I use 0.5.37-r1 which is the current release in portage and a patched grabber for tv_grab_de_tvtoday. It doesn't work directly with mythfilldatabase, you have to call it directly and write to a file before calling mythfilldatabase. You can find more information on my website at http://osiris.simeli.net where you can also download my grabber.

The CVS version of xmltv seems to work again, you have to use all of xmltv tough, can't just copy the grabber. I don't like to mess with cvs stuff on my server, so i'll stick with this solution for the time being.

btw, a channel/frequency sheet for zurich cablecom can be downloaded on my server http://osiris.simeli.net/downloads/cablecom.xls

Drop me a pm if you need any more help.

Gruesse aus Zurich
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PostPosted: Mon Apr 10, 2006 8:21 am    Post subject: Reply with quote

Up to now I have noticed that for 0.19 it takes really long to change channels (at least with DVB-T)
0.18 was faster (and that was already slow) - now we are talking about some 10s - hardly much of
use for channelsurfing. What is good in 0.19, at least, is lossless transcoding and some other things so
I am currently in crossroads.
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PostPosted: Tue Apr 25, 2006 12:05 am    Post subject: Reply with quote

I tend to use MythTV as my PVR, not my channel surfer. If I want to channel surf I'll turn the TV over to antenna input and surf ;)

Chad
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PostPosted: Tue Apr 25, 2006 5:47 am    Post subject: Reply with quote

I dont like the delay in channel change either. I dont use mythtv as much as normal tv. I hate it that the subtitling isnt automatically enabled. It isnt enabled for live tv or recording. No big problem as long as they speak english though. There should be an options page for the subtitles where one can enable it automatically as well as set subtitle position and font and whatnot...
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PostPosted: Mon Jun 05, 2006 10:26 am    Post subject: Re: Error here Reply with quote

pepelepew wrote:
Tried 0.19. Compiled OK but when I click 'Watch TV' borks immediately with this in the terminal window:

2006-02-12 22:54:18.459 Using protocol version 26
2006-02-12 22:54:18.475 TV: Attempting to change from None to WatchingLiveTV
2006-02-12 22:54:18.485 Using protocol version 26
2006-02-12 22:54:18.507 GetEntryAt(-1) failed.
2006-02-12 22:54:18.511 EntryToProgram(0@Thu Jan 1 00:00:00 1970) failed to get pginfo
2006-02-12 22:54:18.511 TV Error: LiveTV not successfully started
2006-02-12 22:54:18.511 TV Error: LiveTV not successfully started
2006-02-12 22:54:18.520 TV: Deleting TV Chain in destructor
2006-02-12 22:54:18.634 Disable DPMS
2006-02-12 22:54:18.634 Enable DPMS

I have tried rescanning all the channels and they get picked up fine.

Ryan


Had the same error. Deleting the card in mythtv-setup and adding at again solved it. Somehow it tried to connect to "tuner 0", which ofcourse is not available (it is "tuner 1" for my PVR-350). Even check the default channel is set up properly!

Now it works like a charm.

Sebi
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PostPosted: Mon Jun 05, 2006 11:17 am    Post subject: Re: Error here Reply with quote

Sebi wrote:
Somehow it tried to connect to "tuner 0", which ofcourse is not available (it is "tuner 1" for my PVR-350). Even check the default channel is set up properly!

This is because in ivtv 0.6.x the tuner numbering changed, using 0.6.x by any chanche :wink:
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PostPosted: Mon Jun 19, 2006 12:03 pm    Post subject: MythTV vs nvidia-kernel > 1.0.7676 vs kernel 2.6.16 Reply with quote

I eventually managed to get 1.0.7676 built against 2.6.15, MythTV is up to the 0.19 portage stable version, and all works.

But now I'd like to get up to the 2.6.16 stable kernel, especially considering the long planned life for this level. I can't get 1.0.7676 to build against this kernel. At work I have 1.0.7174 (the last level that supports my "legacy" card) running against 2.6.16, but at home I haven't tried regressing the driver back yet.

Are others having this build problem, or is it uniquely mine?

Does nVidia have a 1.0.8xxx driver yet that doesn't peg the CPU with MythTV?
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PostPosted: Tue Jun 27, 2006 8:51 pm    Post subject: Reply with quote

pepelepew wrote:
Thanks to the last two posters. I did the "chown -R mythtv:users *;chmod -R ug+rw *" in my video directory, added mythtv to audio and video groups and copied ocer /var/log/mythtv to /etc/mythtv and it now works.
Only problem is that after all that there's nothing decent on TV :D.

Ryan


what video directory are you talking about? I'm getting that same getentry error you did

Thanks!
George
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