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R5A9: all tuner cards in use on live tv after update + fix
http://forums.linhes.org/viewtopic.php?f=1&t=3577		 Page 1 of 1
Author:  epyonrx7 [ Fri Feb 18, 2005 5:43 pm ]
Post subject:  R5A9: all tuner cards in use on live tv after update + fix
I just auto-updated from R4V5 to R5A9 last night and ran into an issue, where upon trying to watch live tv, I got a message that all tuner cards were in use.

This wasn't the case. There were no scheduled recordings (prototype/proof of concept box). I checked the system status, and the tuner cards showed as not in use. I tried remotely on my Powerbook and got the same message.

I then tried running myth-setup and clearing my tuner card info. Upon restarting the backend, I noticed a message that /root/.qt couldn't be created. Permissions were 660. On a hunch, I decided to be heavy handed and I set that directory and everything in it to 777. Lo and behold, everything worked, and I could view tv from all of my tuner cards.

Hopefully this might be of use to someone else out there.

My config:
    old crusty hand-me-down board w/ AMD Duron 1.2GHz
    384MB RAM
    200GB Maxtor
    2x PVR-250 (great) :twisted:
    1x WinTV Go PCI (awful) :evil:
Author:  cesman [ Fri Feb 18, 2005 6:00 pm ]
Post subject: 
Oddity indeed. Making a file or directory under /root is a very bad idea. After restarting the backend, did you try to watch TV?
Author:  epyonrx7 [ Fri Feb 18, 2005 7:20 pm ]
Post subject: 
I had restarted the backend and the machine several times, and I had seen the "All Tuner Cards In Use" message upon watching live tv every time until I changed permissions.

Testing methodology:
1) fire up myth-frontend
2) try and watch live tv
3) see evil message
4) quit frontend
5) tweak something
6) restart backend
7) repeat, with a couple of mythbox powercycles in there

I had seen the "can't access/write/whatever file /root/.qt" a couple of times before I realized it could be an issue.

After I did a chmod -R 777 /root and restarted the backend, the /root/.qt message went away.

I then fired up the front end and got to live TV without a problem. I fired up live TV simultaneously on my Powerbook from the second PVR 250 also without the message.

So it's sounding like mythtv is processing a file it shouldn't. Not sure what everyone else's permissions on /root are, but permissions on that directory might be something that KnoppMyth could look out for.
Author:  cesman [ Fri Feb 18, 2005 7:45 pm ]
Post subject: 
Sorry, while KnoppMyth is meant to be a PVR and it is hopfully behind a firewall, it WILL NOT include /root with permissions of 777 (PERIOD).
Author:  epyonrx7 [ Fri Feb 18, 2005 7:57 pm ]
Post subject: 
Of course not! :shock:

Never meant that KnoppMyth should start churning out legions of completely accessible linux boxes!

I'm just not sure of what the correct, minimally accessible permissions on /root/.qt are to get mythtv to run. So on my firewall protected box, I opened it up to see what worked. I'm sure others could be a little less heavy-handed if they run into the same problem - I was just highlighting a permissions issue. :)
Author:  cecil [ Fri Feb 18, 2005 8:35 pm ]
Post subject: 
Like I stated this is an oddity. I've seen it once or twice before. I've solved it by either restarting the backend or dropping the cards, reconfiguring and restarting backend.
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