[mythtv-users] cx88-dvb won't load

Tue Mar 21 23:47:15 UTC 2006

Thank you for this - I for one benefit from this type of overview.

Mark

On 3/21/06, R. G. Newbury <newbury at mandamus.org> wrote:
> Mark Johannessen wrote:
> > I tried both renaming and doing a chmod 000 on the files tveeprom.ko,
> > tuner.ko, and tda9887.ko that were in three directories on my FC4
> > system, for example:
> >
> > # locate tveeprom.ko
> > /lib/modules/2.6.11-1.1369_FC4/kernel/drivers/media/video/tveeprom.ko
> > /lib/modules/2.6.15-1.1833_FC4/updates/drivers/media/video/tveeprom.ko
> > /lib/modules/2.6.15-1.1833_FC4/kernel/drivers/media/video/tveeprom.ko
>
> Some history here.
> The v4l and dvb people merged their code and got it into the kernel at
> about 2.6.14. That code base uses a file tveeprom.ko to query the
> hardware and pass parameters to the ATSC module (cx88-dvb_ or the NTSC
> module (CX8800). The other modules, cx8802 and cx88-blackbird are
> support modules and may be used by either main module. Fedora, at least,
>  seems to make up its own mind about which module (cx8800 or cx88-dvb)
> it will load first when the kernel finds the hardware. (The modules are
> listed in /lib/modules/$KVER/modules.pcimap but I cannot get the order
> to 'stick') I suspect that all this happens very early in the boot
> process and *before* modprobe.conf gets called (which is why modprobe
> commands do not seem to do what you would expect).
>
> The ivtv people also use a module called tveeprom.ko. Because these both
> query the hardware there are some standards about calling methods etc.
> which makes them similar. In versions .2 and .3 (and IIRC .40) ivtv's
> module was called tveeprom-ivtv.ko.... thus the instruction to add the
> line 'alias tveeprom tveeprom-ivtv' to modprobe.conf.
>
> Now these groups are aiming at merging the code completely. For whatever
> reason, in ivtv .43 the module has reverted to being called tveeprom.ko.
> Big collision!
>
>
> HERE IS THE PROBLEM:  the ivtv tveeprom module will NOT work with a dvb
> card. It will work only with Hauppauge type cards. BUT Hauppauge cards
> will work happily with the dvb version tveeprom module (since about
> version .41...October 2005)
>
> So, please take notes, there will be a test on this material and it will
> count for 100% of your final mark!
>
> 1.      If you have only a Hauppauge card, you may use he ivtv tveeprom module.
> 2.      If you have an HD3000 card, you must use the kernel tveeprom module.
> 3.      If you have both an HD3000 card and a Hauppauge card, you must use
> the kernel tveeprom module together with the ivtv tuner, tda9887 and
> other modules.
>
> Rename the tveeprom.ko module in the /updates/drivers... etc folder chain.
> Rename the tveeprom.ko module in the /ivtv folder chain but not the
> other modules in that folder.
>
> Comment out all of the lines in modprobe.conf relating to dvb.
>
> Add the following to your rc.local file:
>
> rmmod -v cx88-blackbird
> rmmod -v cx88-dvb
> rmmod -v cx8800
> rmmod -v cx8802                 #Remove *everything*!
> modprobe cx88-dvb               #The kernel will decide what else it needs to load
>
> The cx88-atsc module had long since been replaced and is no longer used.
> Where did your line calling it come from? That module is NOT in the kernel.
> Except for firmware, everything you need to make an HD3000 card work, is
> in the kernel (excepting mythtv, or xine etc)
>
> You need not worry about the kernel 2.6.11 version, as it will only be
> used if you use grub to boot into 2.6.11.
>
> *************** IMPORTANT *******
> RUN depmod -a
>
> AFTER renaming the unwanted versions.
>
>
> > my /etc/modprobe.conf looks like this:
> >
> > =====================
>
> > alias char-major-81 ivtv
> You should have a line here for the PVR card handled by ivtv...
> alias char-major-81-0 ivtv      #points to /dev/video0
>
> Comment out the following
>  install cx88-atsc /sbin/modprobe cx8800;/sbin/modprobe
>  --ignore-install cx88-atsc
>  install cx88-dvb /sbin/modprobe cx8800;/sbin/modprobe --ignore-install
> cx88-dvb
>  install btcx-risc /sbin/modprobe tuner;/sbin/modprobe --ignore-install
> btcx-risc
> *************
> > I get:
> >
> > WARNING: Error inserting cx88xx
> > (/lib/modules/2.6.15-1.1833_FC4/kernel/drivers/media/video/cx88/cx88xx.ko):
> > Unknown symbol in module, or unknown parameter (see dmesg)
> > WARNING: Error inserting cx8802
> > (/lib/modules/2.6.15-1.1833_FC4/kernel/drivers/media/video/cx88/cx8802.ko):
> > Unknown symbol in module, or unknown parameter (see dmesg)
> > FATAL: Error inserting cx88_dvb
> > (/lib/modules/2.6.15-1.1833_FC4/kernel/drivers/media/video/cx88/cx88-dvb.ko):
> > Unknown symbol in module, or unknown parameter (see dmesg)
>
> These errors tell me that you still have the NTSC module cx8800 loaded.
> As far as I know, cx88xx is ONLY loaded by cx8800...it is not loaded on
> my setup with cx88-dvb. I suspect that the cx88-dvb load fails because
> the cx8800 module is already loaded.
>
> I think you need the rmmod's to clean things up (or use modprobe -r if
> you prefer).
>
> > I found that by removing ivtv (yum remove ivtv), I can get
> > /sbin/modprobe -v cx88-dvb to load and create the /dev/dvb directory,
> > but that breaks at least lirc for my PVR 350.  This at least confirms
> > that the issue is with ivtv.  It appears others have gotten cx88-dvb
> > to load by simply moving the three files above, but for some reason
> > that doesn't work for me.  I also tried re-ordering the loading of
> > ivtv, cx88_blackbird, cx88-dvb, and cx8800 with no luck.
>
> Of course it breaks lirc *for the PVR350*...removing ivtv should remove
> the supporting modules that let the PVR350 work.
> The last line just above is the source of the problem. DO NOT LOAD
> CX8800  *EVER*.
> (Well, not if you want to receive ATSC!).
>
> Hope this helps to clarify what the heck is going on!
> Messed me up too!
>
>
>        R. Geoffrey Newbury
>      Barrister and Solicitor
>  Suite 106, 150 Lakeshore Road West
>     Mississauga, Ontario, L5H 3R2
>
>   905-271-9600  Fax 905-271-1638
>        newbury at mandamus.org
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