[mythtv-users] Is there a tuner limit? (problem with >8 tuners)

Robin Hill myth at robinhill.me.uk
Mon Aug 20 13:42:07 UTC 2007

On Mon Aug 20, 2007 at 12:32:11PM +0100, Chris Wilkie - NetrinoUK wrote:

> Hi All
> I've been pointed here by the chaps on the MythDora forum, hoping to
> gain some advice on getting a box working with 12 tuners (6 x Nova-T 500
> dual tuner PCI cards).  I am able to get the first four cards working,
> giving 8 tuners, but the last two throw errors when trying to load the
> driver.
<- snip ->
> Now, 8 seems to be a convenient number to stop working on, so I'm
> wondering if this is a limitation in the driver?  Or (hopefully) there
> is a tweak that needs to be done to allow this many tuners to be used.
> Surely I'm not the only one mad enough to run that many tuners in a
> single box?
Yes, 8 is a limit defined within the DVB subsystem
(drivers/media/dvb/dvb-core/dvbdev.c).  I suspect you may need to do a
little more than just modifying that value though - you're safest
checking on the linux-dvb mailing list

    ( ' }     |       Robin Hill        <myth at robinhill.me.uk>  |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |
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