Re: Bug#854100: libdvbv5-0: fails to tune / scan

[Mauro Carvalho Chehab <mchehab@osg.samsung.com>]

Em Fri, 10 Feb 2017 22:02:01 +0100
Gregor Jasny <gjasny@googlemail.com> escreveu:

> Hello Mauro & DVB-S maintainers,
> 
> could you please have a look at the bug report below? Marcel was so kind
> to bisect the problem to the following commit:
> 
> https://git.linuxtv.org/v4l-utils.git/commit/?id=d982b0d03b1f929269104bb716c9d4b50c945125

Sorry for not handling it earlier. I took vacations on Jan, and had a pile
of patches to handle after my return. I had to priorize them, as we're
close to a Kernel merge window.

Now that Linus postponed the merge window, I had some time to dig into
it.

> 
> Bug report against libdvbv5 is here:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854100

There was a bug at the logic that was checking if the frequency was
at the range of the local oscillators. This patch should be addressing
it:
	https://git.linuxtv.org/v4l-utils.git/commit/?id=5380ad44de416a41b4972e8a9c147ce42b0e3ba0

With that, the logic now seems to be working fine:

$ ./utils/dvb/dvbv5-scan ~/Intelsat-34 --lnbf universal -vv
Using LNBf UNIVERSAL
	Universal, Europe
	10800 to 11800 MHz, LO: 9750 MHz
	11600 to 12700 MHz, LO: 10600 MHz
...
Seeking for LO for 12.17 MHz frequency
LO setting 0: 10.80 MHz to 11.80 MHz
LO setting 1: 11.60 MHz to 12.70 MHz
Multi-LO LNBf. using LO setting 1 at 10600.00 MHz
frequency: 12170.00 MHz, high_band: 1
L-Band frequency: 1570.00 MHz (offset = 10600.00 MHz)

I can't really test it here, as my satellite dish uses a different
type of LNBf, but, from the above logs, the bug should be fixed.

Marcel,

Could you please test? The patch is already upstream.
I added a debug patch after it, in order to help LNBf issues
(enabled by using "-vv" command line parameters).

Thanks!
Mauro