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Old 06-14-2015, 04:47 PM   #1
TomBoyle
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Audio from TV Card does not load from time to time


Hello

I have an old Hauppauge WinTVGo TV/capture card that worked flawlessly for years in linux. But starting this year and once in a blue moon, the audio is not heard from the TV card. What's even more weird is there is audio for the rest of the system.

To get the audio to work again for the TV card, I have to reboot the system. And when the system reloads, the audio is working fine for the TV card as usual.

My question is are the newer kernels having issues when handling old hardware?

Instead of rebooting the system to get the audio to work again for the TV card, is there a way I can reload the modules for the TV audio without the reboot? Thanks for reading

Last edited by TomBoyle; 06-14-2015 at 04:51 PM.
 
Old 06-14-2015, 09:33 PM   #2
frankbell
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It would help to know what distro/version and what kernel version you are using.

Linus Torvalds seems committed to keeping support for old hardware in the kernel, so long as that hardware is still in use.

If the Hauppage card works properly after a reboot, that would indicate that the kernel support is still there. You could try using modprobe to unload and reload the relevant kernel module.

You might also look in logs to see if there's some hint as to what's going on. I'd start with /var/log/system and /var/log/messages.

You could also start whatever capture software you are using from the command line. Perhaps the software will throw some useful error messages to the terminal, though, if the audio is just silently dying, that might be a long shot.
 
Old 06-15-2015, 02:25 PM   #3
TomBoyle
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Quote:
Originally Posted by frankbell View Post
It would help to know what distro/version and what kernel version you are using.
Code:
[~]  uname -a
Linux localhost.localdomain 3.19.4-pclos1 #1 SMP Mon Apr 13 13:51:25 CDT 2015 x86_64 x86_64 x86_64 GNU/Linux
Code:
[~]  lsmod | egrep "bttv|bt878"
bt878                   7004  0 
bttv                  100220  2 bt878
v4l2_common             2721  5 tuner,tda7432,tvaudio,msp3400,bttv
videodev               99254  7 tuner,tda7432,tvaudio,msp3400,bttv,v4l2_common
videobuf_dma_sg         7351  1 bttv
videobuf_core          12338  2 bttv,videobuf_dma_sg
btcx_risc               2651  1 bttv
rc_core                14343  1 bttv
tveeprom               13313  1 bttv
i2c_algo_bit            4338  2 bttv,i915

Thanks for the reply Frank. My issue is not major. The majority of the time the audio is working fine for the TV card when the system boots. Only on rare occasions some modules for the TV audio fails to load at boot and a quick reboot is the only way to resolved this.

I will keep your suggestions about reloading the modules for the TV card when this happens again. I will post back in the future on what works. The two modules in bold are good starting points for a reload as both have something to do with tvaudio.

Thanks again

Last edited by TomBoyle; 06-15-2015 at 02:33 PM.
 
Old 06-15-2015, 09:44 PM   #4
frankbell
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(Grin) I haven't dealt with Hauppage cards since I worked for a security software/hardware company; we used them mainly for capturing photos for ID cards. They seem to be just as annoying now as they were then.
 
Old 06-15-2015, 09:58 PM   #5
TomBoyle
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Quote:
Originally Posted by frankbell View Post
(Grin) I haven't dealt with Hauppage cards since I worked for a security software/hardware company; we used them mainly for capturing photos for ID cards. They seem to be just as annoying now as they were then.
Yeah, I know what you mean. But, I was lucky that I chosen a TV card that did worked in linux for many years and still does. I would like to get a new one but with so many brands it will be a gamble to chose one that will work with linux.

Last edited by TomBoyle; 06-15-2015 at 09:59 PM.
 
Old 06-15-2015, 10:33 PM   #6
frankbell
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As I recall (and it's been a long time since I worked there), Hauppage was the only card that my company supported. The company was reasonably sane, so there was likely a reason for that.
 
  


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