[linux-dvb] Re: how-to for newbies

[Alex Woods <linux-dvb@giblets.org>]

On Saturday 12 Apr 2003 11:30 pm, Robin Marlow wrote:
> Ok, I started with kernel 2.4.21mdk91.  When I applied the bttv patch,
> (manually as it wouldn't play nicely) everything compiled fine - but it
> wouldn't boot.  When depmod ran it caused a stack trace to be produced &
> then hung irreversibly when loading another module.
> So i thought i should use the version of bttv that the patch was written
> for (bttv-0.9.4)  But it says that to use this you have to use a specially
> patched kernel 2.4.20-kraxel.  So i got this kernel, patched it to Kraxel &
> compiled it and the modules.  Then compiled the patched bttv module.   This
> installed too... i was almost getting optimistic!
>

Ergh, distros packaging pre-release kernels again!

I'm afraid that I have no experience with the bttv stuff myself, but so far as 
I'm aware, all you need is a stock kernel and the patches from dvb-kernel 
cvs.  I did come across this thread when trying to find out what a nebula was 
though:

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=20030326190937779%2B0000%40news.cis.dfn.de&rnum=1&prev=/groups%3Fq%3Ddigitv%2Blinux%2Bnebula%2Bbttv%26hl%3Den%26lr%3D%26ie%3DUTF-8%26selm%3D20030326190937779%252B0000%2540news.cis.dfn.de%26rnum%3D1

> So i made the dvb-kernel from the download package, but the make install
> didn't do anything (there isn't a make install).  so i made the cvs version
> & that did install.  I copied the sandy heath (i live in london & it
> sounded the closest) channel.config to the .szap directory, but it still
> complained about there being no /dev/dvb something.  So i thought that it

Are you using devfs?  If not, you'll have to create some device nodes.  Have a 
look at the INSTALL doc in linuxtv-dvb-1.0.0-pre2 for how to do this.  If you 
are using devfs, the card isn't being detected properly.  Does anything 
appear in /var/log/kern.log when you insmod the modules?  The modules are 
getting insmoded aren't they  (lsmod to see loaded modules)??

The nebula seems to be a terrestrial card, so you'll want to be using tzap 
rather than szap once you actually have some devices to work with.

> wasn't loading the modules correctly & out of desparation added what i
> found in the modules.conf in the linuxtv-dvb package to mine.  Then

Oops, not the best idea to add them manually.  Check out your 
/etc/modules.conf, it'll say something like:

### This file is automatically generated by modules-update
#
# Please do not edit this file directly. If you want to change or add
# anything please take a look at the files in /etc/modules.d and read
# the manpage for modules-update.

Probably says to take a look at files somewhere else for you though.  Anyway, 
copy the modules.conf from linuxtv to /etc/modules.d/dvb (or whatever dir it 
says for you) and run modules-update (or update-modules or whatever it says 
for you).

> rebooted.  Everything worked until it hung dead loading X.  When i gave up
> and had a beer & wrote my angry email.
>

Not sure why X is dead, unless you forgot rebuild a graphics card driver when 
you changed kernels.

> any idea?  i haven't!
>

After midnight on Saturday?  Get real ;)

Cheers,
Alex


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