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blank screen on "watch tv"
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Author:  PhileDealer [ Tue Feb 15, 2005 9:53 pm ]
Post subject:  blank screen on "watch tv"

I've done the install step for step, but I swear I'm missing something somewhere. My specs are:

P4 1.7
512 megs RAMBUS
40G maxtor 7200 rpm
nVIDIA 5200 128 meg /w tv out
SB live! value
Hauppage 250
some POS NIC


Anyways, setup and install seemed to go OK, but upon starting everything up to it out, my "watch tv turns" up a blank screen. Doing a

cat /dev/video0 > /tmp/test.mpg

turns up a weird blank file that seems to crash mplayer, and also winamp on my windows box when i ftp it over.
After I hit ESC at the blank screen on watching tv, this is the output I get:


root@mythtv:/home/mythtv# mythfrontend
Registering Internal as media playback plugin.
Registering MythDVD DVD Media Handler as a media handler
Registering MythDVD VCD Media Handler as a media handler
Registering MythMusic Media Handler as a media handler
Mediamonitor: Adding /dev/cdrom
Mediamonitor: Adding /dev/dvd
Starting media monitor.
Media status changed... New status is: MEDIASTAT_OPEN old status was MEDIASTAT_MOTMOUNTED
Media status changed... New status is: MEDIASTAT_USEABLE old status was MEDIASTAT_OPEN
Posting MediaEvent
Found a handler
metadata.o: Your database is out of whack. This is not good.
MythThemedDialog.o: something is requesting a screen update of zero size. A widget proabably has not done a calculateScreeArea
(). Will redraw the whole screen (inefficient!).
Connecting to backend server: 127.0.0.1:6543 (try 1 of 5)
Using protocol version 13
Using protocol version 13
Using protocol version 13
Opening OSS audio device '/dev/dsp'.
Audio fragment size: 4096
Using XV port 111
Changing from None to WatchingLiveTV
Using realtime priority.
Waited too long for ringbuffer pause..
Waited too long for ringbuffer pause..
Changing from WatchingLiveTV to None
Changing from None to None
root@mythtv:/home/mythtv#

I'm at a loss.

And suggestions would rock

Author:  xtopher [ Tue Feb 15, 2005 9:56 pm ]
Post subject: 

I am having the same problem ...

Does tunner 0 show up in your Mythtv-setup screen.
all i get is television as my choice. where i use to get composit, tuner, and something else.

Author:  PhileDealer [ Tue Feb 15, 2005 10:01 pm ]
Post subject: 

Ya, I have all the Composite, Tuner0 and a few SVideo

Author:  Xsecrets [ Tue Feb 15, 2005 10:30 pm ]
Post subject: 

if you have television it is not being recognized as an mpeg2 device. ivtv drivers have tuner0 v4l(software) devices and pchdtv3000 devices have television.

Author:  PhileDealer [ Wed Feb 16, 2005 7:40 am ]
Post subject: 

I don't quite understand. Are you saying that my install failed to recognize my tuner card as a valid mpg device? Or that I should be using the svideo for my input instead of the tuner0 as I don't need it to change channels? I'm pretty new at this.

Author:  Xsecrets [ Wed Feb 16, 2005 7:45 am ]
Post subject: 

PhileDealer my comment was aimed at xtopher who said he was not even seeing a tuner0. My two big questions for you would be 1) have you upgraded the ivtv drivers, if not see 2., and 2) have you searched for blank screen?

Author:  srahrens [ Wed Feb 16, 2005 11:39 pm ]
Post subject: 

Funny, I checked out the ol' myth box in order to assist you, and found a blank screen on my live tv as well! (I still use tivo for live tv, havent fully made the leap yet)

Anyway, turns out the backend had crashed. This seems to be happening more often on my system lately. To check just exit mythtv, open an xterm, su to root, and run
Code:
ps -u mythtv
mythbackend should be list there. if not, run
Code:
mythbackend &
worked for me...

If that didn't help, try the following:

blank screen with sound:
Code:
del /dev/fb0autodetect
del /dev/fb1
mknod /dev/fb1 c 29 1
chmod 666 /dev/fb1
chown mythtv /dev/fb1

Blank screen, no sound: it may be that your simply on the wrong input.
makde sure your video input defaults to tuner0 in mythsetup.

hope that helps, --scott

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