[linux-dvb] Two card config question

Philip Prindeville philipp_subx at redfish-solutions.com
Mon Oct 31 05:12:02 CET 2005

Michael Krufky wrote:

> Jon Burgess wrote:
>> Philip Prindeville wrote:
>>> Michael Krufky wrote:
>>> install bttv0 /sbin/modprobe --ignore-install bttv && /sbin/modprobe 
>>> dvb-bt8xx && /sbin/modprobe dst
>>> install bttv1 /sbin/modprobe --ignore-install bttv &&
>>> But that doesn't work...  or at least, not automatically at boot.  I 
>>> have to run
>>> "modprobe bttv0" and then "modprobe bttv1"...  I suppose there's an 
>>> easy
>>> way to fix that, such as:
>> I think the reason it doesn't work is that the "modprobe bttv" 
>> creates both the bttv0 & bttv1 devices, hence only one of your two 
>> "install bttvX" lines ever gets executed. You could try having just a 
>> single line which does everything:
>> install bttv /sbin/modprobe --ignore-install bttv && /sbin/modprobe
>> dvb-bt8xx && /sbin/modprobe dst && /sbin/modprobe cx88-dvb && 
>> /sbin/modprobe cx8800
> cx88-dvb depends on cx8802, which depends on cx8800 which depends on 
> cx88xx
> so, the && logic above is incorrect, and irrelevant... all that must 
> be modprobe'd is cx88-dvb ... it will automatically load all of its 
> dependencies.

Still not clear...  I was thinking about the "bttv" options...  If one
of the
invocations of bttv requires:

options bttv0 card=113 i2c_hw=1

but the other invocation of bttv requires:

options bttv1 card=112

(with no "i2c_hw=1" parameter), how does one break those out?


>> FWIW, I removed all my modprobe lines for the frontends of my budget 
>> cards. There was a change made a while ago to the budget code which 
>> forced it to load every supported frontend when the budget module is 
>> loaded. Perhaps this change should be propagated to other card drivers?
> This is already the case.  bttv is the analog driver, dvb-bt8xx is the 
> DVB driver, and it automatically loads (bt878 and) all supported 
> frontends EXCEPT dst.
>> If all else fails, just add the modprobe commands to the 
>> /etc/rc.local file. These will be executed every reboot.
>>     Jon

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