[pvrusb2] frequencies below 50MHz

Tobias Knieper tobias.knieper at gmail.com
Fri Jun 22 11:24:54 CDT 2007


On Friday 22 June 2007, Mike Isely wrote:
> On Fri, 22 Jun 2007, Tobias Knieper wrote:
> > Hello list,
> > I'm using my pvrusb2 box (model 29039 Rev D257 PAL-B/G-I-D/K-SECAM) for a
> > year or so but never get it to work with a channel of frequency 48,25 MHz
> > (PAL, Germany). The next channel at frequency 55,25 MHz works fine.
> >
> > Are there any hardware or driver limitations to use that frequency? Or
> > can anyone hint me to a line of code which might be the reason for the
> > limitation?
> >
> > Thanks and best regards,
> > Tobias Knieper
>
> There are range checks in the driver.  However to understand this
> correctly I need to know which driver version you are using.  Is this an
> in-kernel driver, and if so which kernel version?
>
> The current driver version range checks against the "legal" frequency
> range reported by the tuner module itself.  But older pvrusb2 driver
> versions used a hardcoded assumedly conservative limit - and the bottom
> at that time was 55.25MHz.  So, which driver version are you running?
> If it is in-kernel, tell me the kernel version.  Output from dmesg will
> help here as well.

Hello Mike,
the machine is running ubuntu feisty with kernel 2.6.20-16-386. The loaded 
pvrusb2 module is an in-kernel one.

Regards,
Tobias


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