Re: Tuner module is too verbose

From: Mauro Carvalho Chehab
Date: Tue Jun 21 2005 - 01:51:54 EST


Damien "tuX" THEBAULT wrote:

>I upgraded from my previous kernel (2.6.10-mm1) to 2.6.12-mm1 today.
>I have a problem with the "tuner" module : it is printing too many
>messages into the syslog :
>"tuner 2-0060: Cmd VIDIOCSCHAN accepted to TV"
>"tuner 2-0060: Cmd VIDIOCGAUDIO accepted to radio"
>(about - return 0; } else \
>+ 26 messages per second, but only when watching TV)
This thing is really strange... 26 msg/sec means a tuner change for
every two video frames! More strange is that tuner is switching from
radio mode to video mode. It is also generating 26 I2C calls to tuner by
second. Maybe you are experiencing some performance troubles with this
application bad behavior.

Maybe there's a radio application that is competing with your TV app.

>I looked into the module's source code and I was able to disable those
>messages with a little modification (patch included).
>(maybe the same modification is needed when CONFIG_TUNER_MULTI_I2C is
>I don't know if this is the good way to do this, but I didn't find any
>other way to solve my problem...
>PS : I'm not subscribed to the list so please CC me.
>--- ./drivers/media/video/tuner-core.old.c 2005-06-20 18:53:12.864742688
>+++ ./drivers/media/video/tuner-core.c 2005-06-20 19:24:42.382492328
>@@ -201,7 +201,7 @@
> #define CHECK_ADDR(tp,cmd,tun) if (client->addr!=tp) { \
>- return 0; } else \
>+ return 0; } else if (tuner_debug!=0) \
> tuner_info ("Cmd %s accepted to "tun"\n",cmd);
> #define CHECK_MODE(cmd) if (t->mode == V4L2_TUNER_RADIO) { \
> CHECK_ADDR(radio_tuner,cmd,"radio") } else \
Your patch will help aliviating the verbose problem, but maybe you
should check if every radio apps are turned off before calling video
app, since they share the same resources.

Mauro Chehab.
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